AC 145-9 

DATE: 7/3/03

GUIDE FOR DEVELOPING AND 

EVALUATING REPAIR STATION AND 

QUALITY CONTROL MANUALS

Initiated by: AFS-340 

Subject: GUIDE FOR DEVELOPING AND 

EVALUATING REPAIR STATION AND 

QUALITY CONTROL MANUALS

Date: 7/3/03 

Initiated By: AFS-340

AC No: 145-9 

Change: 

1. PURPOSE. This Advisory Circular (AC) provides information and guidance material for all 

repair station certificate holders or applicants under Title 14 of the Code of Federal Regulations 

(14 CFR) part 145 to develop and evaluate a repair station manual (RSM) and quality control 

manual (QCM). The material presented in this AC describes an acceptable means, but not the 

only means, to develop a manual and comply with the referenced regulations. 

2. CANCELLATION. This AC cancels AC 145-3, Guide for Developing and Evaluating 

Repair Station Inspection Procedures Manuals, dated February 13, 1981. 

3. RELATED 14 CFR PARTS. Title 14 CFR parts 1, 21, 43, 65, 91, 121, 125, 129, 135, and 

145. 

4. DEFINITION OF TERMS (FOR THE PURPOSE OF THIS AC).

a. Acceptable. Data is acceptable when it meets the requirements of the applicable 

regulations.

b. Accountable Manager. The person designated by the certificated repair station who is 

responsible for and has the authority over all repair station operations that are conducted under 

part 145. This person’s duties include ensuring that repair station personnel follow the 

regulations and serving as the primary contact with the Federal Aviation Administration (FAA). 

c. Approved. Approved by the Administrator unless used with reference to another person. 

Approval is granted to a repair station when the information, such as a process specification or 

rating, is listed on the operations specifications (OpSpecs). 

d. Article. An aircraft, airframe, aircraft engine, propeller, appliance, or component part. 

e. Contracting. Entering into an agreement between two or more persons for the 

performance of maintenance functions on an article. 
AC 145-9 7/3/03 

f. Correction. An action taken to eliminate a detected nonconformity. For repair stations 

electing to use an International Organization for Standardization (ISO 9000) quality system, a 

correction may involve repair or rework and may be made in conjunction with a corrective 

action. 

g. Corrective Action. An action taken to eliminate the cause of a detected nonconformity 

or other undesirable condition to prevent its reoccurrence. For repair stations electing to use an 

ISO 9000 or similar system, the undesirable condition may include potential regulatory 

violations, which differs from a nonconformity requiring correction. 

h. Designated Engineering Representative (DER). A private person designated by the 

FAA Administrator to act as its representative for examining, inspecting, and testing aircraft and 

related data. A DER may recommend approval or approve data within the limitations of his or 

her certificate of authority. 

i. Directly in Charge. Responsible for the work of a certificated repair station that performs

maintenance, preventive maintenance, alterations, or other functions affecting aircraft 

airworthiness. A person directly in charge doesn’t need to physically observe and direct each 

worker constantly, but must be available for consultation on matters requiring instruction or 

decision from higher authority. 

j. Line Maintenance.

(1) Any unscheduled maintenance resulting from unforeseen events; or 

(2) Scheduled checks that contain servicing and/or inspections that do not require 

specialized training, equipment, or facilities. 

k. Maintenance. Inspection, overhaul, repair, preservation, and the replacement of parts, 

excluding preventive maintenance. 

l. Maintenance Function. A step or series of steps in the process of performing 

maintenance, preventative maintenance, or alterations, which result in approving an article for 

return to service. 

m. Major Alteration. An alteration not listed in the aircraft, aircraft engine, or propeller 

specifications that: 

(1) Might appreciably affect weight, balance, structural strength, performance, power 

plant operation, flight characteristics, or other qualities affecting airworthiness; or 

(2) Is not done according to accepted practices or cannot be done by elementary 

operations. 

n. Major Repair. A repair that: 

Page ii Par 4 
7/3/03 AC 145-9 

(1) If improperly done, might appreciably affect weight, balance, structural strength, 

performance, power plant operation, flight characteristics, or other qualities affecting 

airworthiness; or 

(2) Is not done according to accepted practices or cannot be done by elementary 

operations. 

o. Operations Specifications (OpSpecs). The official document that describes the 

authorizations, ratings, and limitations of the repair station. 

p. Preventive Action. An action taken to eliminate the cause of a potential nonconformity

or other potentially undesirable situation. For repair stations electing to use an ISO 9000 system, 

preventative action is taken to prevent an occurrence, whereas corrective action is taken to 

prevent a reoccurrence. For a repair station using an American Society for Quality (ASQ) 

system, preventative action is taken to remove or improve a process to prevent potential future 

occurrences of a nonconformance. 

q. Preventive Maintenance. Simple or minor preservation operations and the replacement 

of small standard parts not involving complex assembly operations. 

r. Procedure. A specified way to perform an activity or a series of steps, such as a 

procedure that describes the methods, steps, or means to carry out policy. 

s. Quality Control Manual (QCM). A manual that describes the inspection and quality 

control procedures used by the repair station. 

t. Rating. A statement that, as a part of the repair station’s certificate, describes the special

conditions, privileges, or limitations issued under part 145, sections 145.59 and/or 145.61. 

u. Repair Station Manual (RSM). A manual that describes the procedures and policies of 

a repair station’s operations. 

v. Required Inspection Item (RII). An item of maintenance that, if not performed properly 

or if improper parts or materials are used, could result in a failure, malfunction, or defect, 

endangering the safe operation of the aircraft. An RII must be inspected by a trained, qualified, 

and authorized inspector. The inspector must be listed on the repair station’s roster but can’t be 

the same individual who performed the work. (See parts 121, 125, and 135, sections 121.371, 

125.251, and 135.429 for details of this requirement). 

w. Supervisor. A person who directs the work performed under the repair station’s 

certificate and OpSpecs. (See part 145, section 145.153 for supervisory personnel requirements.) 

Par 4 Page iii 
AC 145-9 7/3/03 

5. BACKGROUND. The FAA has revised part 145, the regulation for repair stations. This 

action is necessary because many of the former repair station regulations did not reflect 

advancements in the repair station business, and technologies. Part 145 reorganizes the 

requirements applicable to repair stations to reduce duplication of regulatory language and 

eliminate obsolete information. In addition, it clarifies the minimum requirements for an RSM, 

introduces a QCM, and describes the items that should be included in these manuals.

/s/ John M. Allen for 

James J. Ballough 

Director, Flight Standards Service

Page iv Par 5 
7/3/03 AC 145-9 

CONTENTS 

Section Page 

CHAPTER 1. GENERAL INFORMATION........................................................................................1 

 1-1. Purpose.................................................................................................................................1 

1-2. The Manual(s)......................................................................................................................1 

1-3. Combining Portions of the Repair Station Manual with the Quality Control Manual ........3 

1-4. Identification and Control of Sections.................................................................................4 

1-5. Sample Procedure Formats..................................................................................................5 

CHAPTER 2. MANUAL REVISION AND CONTROL ..................................................................11 

2-1. Procedures for Revision.....................................................................................................11 

2-2. Provisions for Control........................................................................................................12 

2-3. Electronic Format...............................................................................................................12 

CHAPTER 3. REPAIR STATION ORGANIZATION CHART.......................................................15 

3-1. Organization Chart.............................................................................................................15 

3-2. Duties and Responsibilities................................................................................................16 

CHAPTER 4. REPAIR STATION AND QUALITY CONTROL MANUAL ELEMENTS ............19 

4-1. Repair Station Personnel Roster ........................................................................................19

4-2. Operations, Housing, Facilities, Equipment, and Materials..............................................21 

4-3. Capability List....................................................................................................................24 

4-4. Training Program Revision................................................................................................26 

4-5. Work Performed at Another Location ...............................................................................27 

4-6. Maintenance, Preventive Maintenance, and Alterations Performed for Air Carriers 

Under Parts 121, 125, 129, and 135...................................................................................29 

4-7. Contract Maintenance Information....................................................................................32 

4-8. Proficiency of Inspection Personnel ..................................................................................36 

4-9. Current Technical Data ......................................................................................................38 

4-10. Inspection and Quality Control System.............................................................................40 

4-11. Required Records and Recordkeeping...............................................................................49 

4-12. Calibration of Measuring and Test Equipment..................................................................52 

4-13. Taking Corrective Action on Deficiencies ........................................................................55 

APPENDIX 1. FORMS (2 pages)......................................................................................................1 

APPENDIX 2. CHECKLIST (13 pages) ..........................................................................................1 

 Page v (and vi)

7/3/03 AC 145-9 

CHAPTER 1. GENERAL INFORMATION 

1-1. PURPOSE. This document is a guide for development and evaluation of the RSM and 

QCM required by part 145, sections 145.207 through 145.211. This guide DOES NOT provide a 

complete sample RSM and QCM for all repair stations. The examples included illustrate one of 

many possible ways to comply with the regulations. 

1-2. THE MANUAL(S). 

a. The repair station may have several manuals or documents that are part of its quality 

control, repair station, and training manual system. The applicant/certificate holder may 

combine portions required by section 145.209 with portions required by section 145.211 into one 

section or chapter of the manual system. For example, the procedures required in 

section 145.209 for RSM revision and the procedures required in section 145.211 for QCM 

revision could be combined into one chapter/section titled, “Manual Revision.” Additionally, the 

repair station may use applicable portions of its ISO manual or other quality system, such as 

ASQ, to show compliance with part 145. 

b. The repair station’s manual(s) must remain current and be accessible for use by repair 

station personnel, as required by part 145 subpart D. The manual(s) may contain more 

procedures than required by the regulations for the certificate holder to describe the repair 

station’s overall functions, responsibilities, and quality control procedures. Procedures described 

in the manual(s) should ensure that the repair station could satisfactorily perform maintenance in 

accordance with its rating(s). In that regard, a repair station with a Limited Specialized Service 

Rating would have different procedures in its manual system criteria than a repair station with a 

Class 3 Airframe Rating. Each manual system should be developed based upon the ratings 

authorized and the size and complexity of the repair station. 

c. The checklist in Appendix 2 may be used to assist the applicant/certificate holder in 

reviewing the content of its manual(s). Not all items listed on the checklist may be applicable to 

each repair station due to differences in rating, size, and type of maintenance performed. 

d. The applicant/certificate holder may submit the manual(s) to the FAA certificate-holding 

district office (CHDO) on paper or by an electronic medium. If the repair station submits the 

manual as part of an initial certification, the manual may be submitted together with related 

documents, such as the application form and repairmen applications, to the CHDO. If the repair 

station submits the manual electronically, the repair station should discuss the format, software, 

and revision procedures with the CHDO before submittal. All submissions will require a cover 

letter. The repair station should follow the procedures described in its manual when submitting 

revisions to an existing manual (see Chapter 2, Manual Revision and Control). 

e. The basic regulatory requirements for manual content are listed below. Each requirement 

will be discussed in detail in the following sections of this AC. 

Par 1-1 Page 1
AC 145-9 7/3/03 

(1) RSM Elements. 

 Manual Revision and Notifying the CHDO. 

 Identification and Control of Sections of the Manual. 

 Organization Chart: 

• Identify each management position 

• The area of responsibility assigned to each management position 

• Duties and responsibilities 

 Rosters—Procedures for Maintaining and Revising. 

 Description of Operations, Including the Housing, Facilities, Equipment, and 

Materials. 

 Capabilities List—Procedures for (if applicable): 

• Revision 

• CHDO Notification 

• Self-Evaluation Before Revision 

• Methods 

• Frequency 

• Reporting Results 

 Training Program—Procedures for: 

• Revision 

• Submitting to CHDO 

 Procedures Governing Work Performed at Another Location. 

 Procedures for Maintenance, Preventive Maintenance, or Alterations for Air 

Carriers. 

 Contracting—Procedures for: 

• Maintaining and revising the list of approved maintenance functions, 

including submitting revisions to the CHDO 

• Maintaining and revising the list of contract maintenance providers, 

including submitting revisions to CHDO 

 Required Records and Recordkeeping System. 

(2) QCM Elements.

 Revision Procedures and Notifying the CHDO. 

Page 2 Par 1-2 
7/3/03 AC 145-9 

 Qualifying and Surveilling Non-Certificated Persons Performing Maintenance, 

Preventative Maintenance, or Alteration for the Repair Station. 

 Establishing and Maintaining Proficiency of Inspection Personnel. 

 Establishing and Maintaining Current Technical Data. 

 Inspection System: 

• Incoming raw material inspection 

• Preliminary inspection 

• Hidden damage inspection 

• Final inspection and return to service

 Calibration of Measuring and Test Equipment, Including Intervals of Calibration. 

 Corrective Action. 

 Samples of Inspection Forms and Instructions for Completion (may be a separate 

manual). 

(3) Portions Recommended for Most Manuals.

 Table of Contents. 

 List of Effective Pages. 

 Record of Revisions. 

1-3. COMBINING PORTIONS OF THE REPAIR STATION MANUAL WITH THE 

QUALITY CONTROL MANUAL.

a. The following chart illustrates one of several possible combinations that 

applicants/certificate holders could use to structure a single manual system. It includes the 

procedures required in both the RSM and the QCM. Other combinations may be possible 

depending upon the ratings, size, and complexity of the repair station. The manual’s content 

must include the applicable procedures required by the regulations, but may be formatted in any 

manner easily understood by employees of the repair station. 

NOTE: A part 145 repair station that also holds an air carrier certificate 

may refer to sections of its air carrier approved maintenance program in 

its part 145 manuals. If the manuals are structured in this manner, those 

sections must adhere to part 145 regulatory requirements. The affected 

sections would apply to aircraft listed on the air carrier OpSpecs or to 

other third party air carriers or aircraft owners that are serviced by the 

certificate holder. 

Par 1-2 Page 3
AC 145-9 7/3/03 

b. The repair station should include a table to show the FAA that its manual system meets 

the requirements of sections 145.209 and 145.211. 

1-4. IDENTIFICATION AND CONTROL OF SECTIONS. 

a. Sequential numbering of the manual(s) from front to rear may cause difficulty for the 

revision process. A minor revision to one of the first pages may cause a change in the content of 

each successive page. The FAA advises the repair station to divide the manual into several 

sections, so that a revision to one page of a section does not affect the entire manual. 

b. Most RSMs are divided into sections of similar subject matter. For instance, one section 

of the manual may contain all of the procedures related to the inspection system. The repair 

station may establish these sections or the sections may be contained within an established 

industry format (such as ISO). The sample formats included in this chapter contain a few 

examples of the many possible methods used for identification. The sections may consist of

several similar individual procedures grouped together through a common numbering system, or 

several similar procedures described in narrative format within a section. Regardless of the 

method used, each section must be identified and controlled. 

c. Many RSM sections are controlled using a table of contents. The table of contents lists 

each section of the manual and the location in the manual. Some repair stations choose to reissue 

a complete section of the manual if any page within that section is revised. The table of contents 

for those facilities may indicate revision status for each section, rather than each page.

d. Some RSMs are controlled using a master document control list. This document lists 

each procedure and the revision status of that procedure. A unique number and revision status 

should identify each procedure within the manual system. If a page within a procedure is 

revised, the entire procedure is reissued. In this system, each procedure is identified and 

controlled, rather than each section. 

e. The procedures to control sections of the manual should address (as applicable): 

 Identification. 

 Revision status. 

 Page numbering. 

 Issue date. 

 Approvals of internal personnel responsible for the manual and revisions. 

Page 4 Par 1-3 
7/3/03 AC 145-9 

f. Example. 

Repair Station Manual 

Element 

+ Quality Control Manual 

Element 

= Possible 

Chapter/Section 

Title 

Training program,

revision, notifying 

CHDO 

+ Establishing and

maintaining proficiency 

of inspection personnel 

= Training

Maintaining and revising

contract information 

+ Qualifying and

surveilling 

non-certificated persons 

= Contracting

Manual revision, CHDO 

notification, 

identification, and control 

of sections 

+ Manual revision and 

CHDO notification 

= Manual Control

Records and

recordkeeping system

+ Establishing and

maintaining current

technical data 

= Document Control

Etc. + Etc. = Etc.

g. Additional combinations that work effectively within the facility and are acceptable to the 

FAA principal inspector (PI) may be included in the manual system. 

1-5. SAMPLE PROCEDURE FORMATS. The following samples are provided to help the 

manual writer determine a possible format for the procedures in the manual system. These are 

only four examples of many possible formats. Part 145 sets forth the requirements for content, 

not format. The format used for the procedures in the manual should fit the size and complexity 

of the facility. If there are existing procedure manuals in the facility, the manual writer may 

wish to include the same format in the RSM(s). If facility employees are accustomed to a 

particular format, the manual writer should continue to use that format. 

Par 1-4 Page 5
AC 145-9 7/3/03 

Sample Procedure Format 1 

John Smith Component Repair, Inc. 

123 Any Street 

Somewhere, CT 12345 

Section: 5 

Page: 3 

Revision: 1 

Date: 11/14/2001 

PRELIMINARY INSPECTION

The Chief Inspector (WHO) of the repair station is responsible for the 

performance of appropriate inspections, including functional and 

nondestructive tests. This inspection will be conducted on the hangar floor or 

in the inspection area (WHERE) for components. This will ensure that all 

units (WHAT) delivered to the repair station for maintenance are inspected to 

determine the state of preservation and any defects. This inspection will be 

recorded on the Preliminary Inspection Form 567 (RECORD) with any 

discrepancies noted. The form must be attached to the work order and will 

remain with the applicable inspection records until the unit is released for 

service. Forms 123 and 789 will be used to record the results of the functional 

and nondestructive tests. Those forms will show the work order number and 

will be routed, attached to the work package. 

HOW

a. Format Discussion. 

(1) Advantages. The above format includes each of the required elements of a 

procedure in a narrative format. This format is easy to write, as long as the author remembers to 

include all of the elements. This format is usually easy for the reader to understand and requires 

no special training for the author or reader. 

(2) Disadvantages. The narrative can easily become too complex or wordy. The author 

may fail to include all of the required elements of the procedure. The narrative must be 

presented in a logical sequence so the reader can easily understand the flow of the procedure. 

Page 6 Par 1-5 
7/3/03 AC 145-9 

Sample Procedure Format 2 

THE JOHN SMITH COMPANY OPERATING PROCEDURE 123

Title: Receiving Inspection Page 1 of 4

Revision: A Issue Date: November 12, 2001

-------------------------------------------------------------------------------------------- 

Reason: To ensure consistent quality of incoming raw material. 

Scope: Applies to all raw material shipments received. This procedure does not 

apply to incoming parts received for repair. 

Responsibility: The receiving inspector is responsible for inspecting all incoming 

raw materials. 

Procedure: 

1. The receiving inspector will visually inspect the container (if used) and/or

material for any shipping or handling damage. 

2. The receiving inspector will immediately report any shipping or handling 

damage to the purchasing department. 

3. Compare the purchase order (copy located in receiving file) with the shipping 

document to ensure the material is correct. 

4. Etc. 

b. Format Discussion. The above format assigns responsibility as part of each procedure. 

The narrative should be written in a format easily understood by the person who uses and must 

follow the procedure. Note that the format also includes revision status, issue date, and page 

numbering. The reason and scope may be used to state the company policy or objective. 

Par 1-5 Page 7
AC 145-9 7/3/03 

Sample Procedure Format 3

John Smith Overhaul & Repair 

Quality Procedure—Control of Inspection, Measuring, and Test 

Equipment 

QP 4.11

Approval Approval Revision/Date Reason for Change 

John Smith, Sr. Jane Doe Original—04/01/2000 Original issue 

John Smith, Sr. Jane Doe A—06/15/2000 Added gage request 

form

1.0 Purpose: To ensure that all precision tools and equipment are properly 

calibrated, identified, and maintained. 

2.0 Scope: This procedure applies to all employees who use inspecting, 

measuring, and testing equipment, and those who calibrate that equipment. 

3.0 Responsibility: The Director of Quality is responsible for ensuring that all 

inspecting, measuring, and testing equipment is calibrated and traceable. 

Only trained and qualified personnel are permitted to adjust and calibrate 

equipment. 

4.0 Reference Documents: 

4.1 QAP 15.0, Inspection and Test Status 

4.2 MIL-STD-120 Gage Inspection 

4.3 Work Instruction (WI) 4.11-1 through WI 4.11-20 

5.0 Definitions: 

5.1 Accuracy of Measurement: The closeness of the agreement 

between the result of a measurement and the conventional true value of the 

measurement. 

5.2 Uncertainty of Measurement: The result of the evaluation aimed at 

characterizing the range within the true value of a measurement. It’s 

estimated to lie generally within a given likelihood. 

5.3 Etc. 

5.4 Etc. 

6.0 Procedure: 

6.1 The gage calibration technician will maintain a computerized list 

of all precision tools and equipment using the Gage Control software 

program. 

6.2 During the first week of the month, the gage technician should run 

the “Calibration Required” report, listing all tools and equipment that must

be calibrated before the end of the month. 

Page 8 Par 1-5 
7/3/03 AC 145-9 

Sample Procedure Format 3 (Continued) 

6.3 The gage calibration technician will issue a John Smith Recall Slip 

(Form 789) to the department or individual. This form states which tools 

are due for calibration and the date they must be returned to the tool crib. 

6.4 Etc. 

7.0 Records: 

7.1 Form 789, Recall Slip 

7.2 Form 456, Record of Calibration 

7.3 Form 123, Identification Sticker 

7.4 Etc. 

c. Format Discussion. The previous format is often used for procedures included in an 

ISO 9000 quality system document. Note that space is provided to document approval and 

release of the document (part of a document control system). Terms used within the procedure 

are defined. Additional documents associated with this procedure are listed. The format is 

structured—perhaps too structured—for some organizations. The procedure follows a standard 

numbering system for each portion of the procedure, allowing for precise reference for 

paragraphs that may be discussed or revised. Work instructions and records may follow the 

same numbering convention (i.e., QP 4.12, WI 4.12-1, and Form 4.12-A). Forms may be 

included within the procedure or in a separate forms section of the manual system. 

Sample Procedure Format 4 

d. Introduction. 

(1) The following flowchart illustrates another possible method of presenting a 

procedure. Although the sample illustrates a simple procedure, complex processes could be 

presented using a flowchart. The person using the manual would need to be familiar and 

comfortable with flowcharts and flowchart symbols. 

(2) The flowchart process may also be used to develop a procedure that was not 

previously documented. The procedure could be initially drawn on paper using a flowchart, and 

then described using the narrative format in the manual. This process works well when the users 

of the manual are more comfortable with narrative procedures rather than flowcharts. 

(3) Another possible use of the flowchart is to verify if a narrative procedure will work. 

This process is essentially the opposite of the process previously described. While reading the 

narrative of the procedure, a flowchart is created to visually represent the various steps. A 

review of the completed flowchart will show any redundant or missing steps. 

(4) A flowchart can also be used during a process audit. The auditor creates a flowchart 

while reviewing the performance of a particular process. The auditor then compares the process 

he or she observed with the process described in the manual. Any differences may be noted in 

the auditor’s report. 

Par 1-5 Page 9
AC 145-9 7/3/03 

Sample Procedure Format 4 (Continued)

Section: 5 

Page: 3 

Revision: 1 

Date: 11/14/2001 

Form

N 123 o

Yes

Notify 

Purchasing and 

Quality Control

Manager 

Visually inspect Damaged?

container/material 

Determined 

by QC 

Manager 

Compare shipper to 

purchase order and 

specification Damage 

acceptable? 

Yes

Form

456

Return to

vendor 

No

No 

See 

material 

review 

QP 

Form

789

Forward 

to QC 

Acceptable?

Release 

form

Move to 

material cage

Yes 

e. Format Discussion. This type of format requires the reader to have some familiarity with 

flow charts, but can be easily understood by someone who understands the format. Because the 

flow charts contain fewer words than other formats, the process can be read and understood 

quickly. This format takes longer to develop unless the author has specific software for the 

purpose. 

Page 10 Par 1-5 
7/3/03 AC 145-9 

CHAPTER 2. MANUAL REVISION AND CONTROL 

2-1. PROCEDURES FOR REVISION. 

a. References. Sections 145.207(e), 145.209(j), 145.209(k), 145.211(c)(4), and 145.211(d). 

b. The RSM and the QCM must contain procedures for revising the manual(s) and notifying 

the CHDO of revisions. 

NOTE: The regulations do not require FAA review and acceptance of

revisions before implementation, provided the repair station follows the 

revision procedures in its manual. The repair station should have a 

procedure in its manual to recall revisions if the FAA finds a revision 

unacceptable. 

c. This section of the manual must contain procedures to control the original submission of 

the manual and subsequent revisions. The procedures should ensure that persons issued a 

manual receive revisions. Repair station employees may require training on the content of the 

revisions, especially if a standard operating procedure or inspection procedure is changed. 

d. The manual must include a description of the system used to identify and control sections 

of the manual. The format and structure of this system is not specified by the regulation. This 

flexibility will accommodate the technological changes that permit repair stations to maintain 

and revise the manuals in different formats and manners. 

 

e. Regardless of the media used for the manual, the procedures for making revisions should 

include: 

 Who, by title, is responsible for making revisions? 

 Who will submit revisions to the FAA for review and acceptance? 

 How will the repair station incorporate changes to revisions found not acceptable to 

the FAA, which do not conform to applicable regulations? 

 How will the repair station correct any maintenance/administrative actions performed 

under revisions that were found not acceptable to the FAA? 

 How will the revisions be distributed and made available within electronic systems, 

and how will the FAA receive its revisions? 

 Accountability—how will the facility ensure that each manual holder or designated 

location receives each revision? 

Par 2-1 Page 11
AC 145-9 7/3/03 

 Identification of each revision to the text on each affected page. For example, a 

vertical bar in the margin or other suitable method may indicate the revised portion of 

text. 

2-2. PROVISIONS FOR CONTROL. If the manual is in paper format, the revision and 

control part of the manual should contain the following (or equivalent) information: 

 Procedures for revising the RSM and notifying its CHDO of revisions, including how the 

FAA will be notified of revisions. 

 Provisions for selecting the revision number, the date of the revision, the pages revised, 

and a place for the person making the revisions to the assigned manual to sign or initial. 

 Manual control number and assignment. Each manual should have a unique number 

assigned to it and the name of the individual, department, or group assigned to that 

particular manual. The manual procedure should identify who will maintain a master 

distribution list that contains the manual number, assigned individual, and revision status. 

NOTE: An acknowledgement form is a common method of tracking the 

receipt and insertion of the revision by the manual holder, which ensures 

accountability. With this method, after receiving a revision, each manual 

holder inserts the revised pages into the manual, records incorporation of the 

revision in the record of revisions, and returns the signed acknowledgement 

form to the person responsible for manual control. 

2-3. ELECTRONIC FORMAT. The manual(s) may be maintained on a computer network or 

other electronic medium, such as a floppy disk or compact disk. AC 120-78, Acceptance and 

Use of Electronic Signatures, Electronic Recordkeeping Systems, and Electronic Manuals, 

provides additional guidance for electronic systems. 

a. If the manual is maintained on a network server, the following concerns must be 

addressed in the procedures: 

 Security—How will the repair station ensure that only authorized personnel make any 

changes? Who (by title) will be authorized to make those changes and how is that 

person authorized? 

 Access—Have the employees been trained to access the manual on the network? Is 

access protected by passwords? Do all of the supervisors and inspectors have access 

to the manual?

 Revisions—How will the user know that the manual has been revised, and the content 

of that revision?

 Availability—How will the repair station ensure that the current manual(s) are 

available for all shifts? 

Page 12 Par 2-1 
7/3/03 AC 145-9 

b. If the manual is maintained on a floppy or compact disk, the following concerns must be 

addressed in the procedures: 

 How will the manual and any subsequent revisions be distributed? How will receipt

of the revision be documented?

 Is the software used for writing the manual compatible with the software used by all 

manual holders, including the FAA? 

 Are all of the manual holders trained on the procedures necessary to access the 

manual at their workstations?

 How can station personnel verify the currency of the disks before use?

NOTE: Federal agencies can no longer refuse electronic versions of 

manuals, forms, record systems, and so forth. Federal law prohibits 

agencies from making the use of electronic media more difficult or 

from requiring additional steps or procedures for users of electronic 

media. Therefore, all repair station document submissions, regardless 

of the media used, must be accompanied by a cover letter that 

describes the submission and is signed by an appropriate manager. 

FAA inspectors will either accept or reject the manual revision. The 

FAA inspector will, by letter, inform the repair station of acceptance 

or rejection. The letter will address the manual title, manual date, 

and revision number. If the manual is rejected, the FAA inspector 

will provide a detailed explanation of the deficiencies and advise the 

repair station not to perform maintenance if the rejected manual 

procedures are in use. 

Par 2-3 Page 13 (and 14)

7/3/03 AC 145-9 

CHAPTER 3. REPAIR STATION ORGANIZATION CHART 

3-1. ORGANIZATION CHART. 

a. Reference. Section 145.209(a). 

b. The organization chart identifies (by title only) each management position with authority 

to act on behalf of the repair station. If the repair station performs work for air carriers or air 

operators under part 145, section 145.205, and is performing RII, the FAA suggests that the chart 

reflect the separation between the maintenance and inspection departments. 

EXAMPLE EXAMPLE 

 Complex Repair Station Small Repair Station 

Chief 

Inspector

Inspectors

Purchasing Comptroller 

Human 

Resource 

Manager 

Quality 

Manager/Accountable

Manager 

Shipping/

Receiving

Supervisor/ 

Repairman

Machinist

President

Repair Station

Manager 

General 

Manager 

Owner/President 

Accountable Manager

Chief Inspector

Technician

c. Ensure that the following concerns are addressed in the manual procedures. 

 Are the titles and reporting structure for the organization chart appropriate for the 

facility? 

 Are the titles for the positions the same throughout the manual?

 Is each management position with authority to act on behalf of the repair station 

identified? 

Par 3-1 Page 15 
AC 145-9 7/3/03 

 Is an accountable manager designated?

3-2. DUTIES AND RESPONSIBILITIES. 

a. This section may be combined with the organization chart as one section/chapter of a 

manual system. If the repair station documents its procedures in a format that includes a 

Responsibility section in each procedure, it will not need to have a separate Duties and 

Responsibilities section (see Chapter 1, Sample Procedure Formats 2 and 3). 

b. This section includes the area of responsibility assigned to each management position and 

the duties, responsibilities, and authority of each management position. The repair station must 

ensure that the duties and responsibilities are appropriate and that the positions exist within the 

company. Although not required by the regulation, many repair stations choose to include duties 

and responsibilities beyond the required management personnel. In essence, positions described 

in the organizational chart should be included in the duties and responsibilities section to ensure 

consistency. 

c. Duties and responsibilities that are outside the scope of the management, but are part of 

the regulatory requirements, should be described in this section of the manual. (For example, 

equipment maintenance, approval for return to service, applications for repairmen, and so forth.) 

d. Only titles, not names, should appear in this section. Titles should be the same as on the 

organization chart and elsewhere in the manual. 

e. Titles used in the following format samples are only examples. 

(1) Sample: Narrative Format. 

Owner/President: The Owner/President is responsible for the overall 

operation of (name of the repair station) in accordance with the 

applicable CFRs. The Owner/President’s duties include maintaining 

an adequate and knowledgeable staff to plan, perform, supervise, and 

inspect the work being performed on civil aviation articles. The 

Owner/President may delegate all duties to the qualified persons as 

necessary. However, such delegation does not relieve the 

Owner/President of the overall responsibility. 

(2) Sample: Outline/List Format.

Quality Manager: The Quality Manager reports to the President and is 

responsible for managing the repair station quality control system. 

The duties of the Quality Manager include: 

1. Supervising all inspection personnel. 

2. Maintaining a current file of pertinent technical data, including

CFRs, specifications, manufacturer’s maintenance manuals, 

Page 16 Par 3-1 
7/3/03 AC 145-9 

service bulletins (SB), Airworthiness Directives (AD), and other 

data acceptable to or approved by the FAA. 

3. Ensuring the proper execution of FAA Form 337, when required. 

4. Etc. 

(3) Sample: ISO/Industry Format. 

The duties and responsibilities may be addressed in the management 

responsibility section of the manual (i.e., section 4.1). 

f. The following questions or concerns are offered as a guide and are intended to help the 

facility initiate the procedures in its RSM. They should not be considered all-inclusive. Each 

facility is unique and therefore may require additional procedures to verify regulatory 

requirements and the needs of the repair station. 

 Do the duties and responsibilities include the areas of responsibility assigned to each 

management position?

 Do the duties and responsibilities indicate the reporting structure (to what other 

position does each report)? 

 Does the narrative describe the job function(s) that person performs (i.e., calibration, 

training, personnel management)?

 Do the procedures ensure that the duties and responsibilities of supervisory and 

inspection personnel are performed in their absence?

 Does the manual have a procedure to determine if a supervisor or inspector is 

qualified for any delegated duties? 

g. Consider the following when assigning duties and responsibilities within the repair 

station: 

 Is each supervisor certificated? 

 Do the inspectors understand, read, and write English?

 Are persons with approval for return to service authority certificated? 

Par 3-2 Page 17 (and 18)

7/3/03 AC 145-9 

CHAPTER 4. REPAIR STATION AND QUALITY CONTROL 

MANUAL ELEMENTS 

4-1. REPAIR STATION PERSONNEL ROSTER. 

a. References. Part 145, sections 145.161 and 145.209(b). 

b. Personnel rosters are lists of individuals within the repair station who are authorized to 

perform certain functions, such as approval for return to service or signing off required 

inspection items, or that hold certain management and supervisory positions. These lists can be 

maintained in paper or electronic format, but must be accessible for review and inspection by the 

FAA. 

c. The repair station must maintain a personnel roster or rosters that list managers, 

supervisors, inspectors, including RII inspectors, and those individuals authorized to approve an 

article for return to service. The Code of Federal Regulations does not specify the format of the 

rosters. Each repair station may develop its own roster format, as long as it contains all of the 

appropriate names. 

d. The rosters do not need to be included in the manual, but the procedures for maintaining 

and revising the rosters must be in the manual. If the rosters are not included in the manual, the 

procedure should describe where the rosters would be located. The procedure must describe how 

the roster will be changed within 5 business days of the termination, reassignment, change in 

duties or scope of assignment, or addition of any personnel. 

e. It may be appropriate for the repair station to develop a combination roster. Such a roster 

would include initials, signatures, stamp numbers, certificate numbers, or any other information 

used to designate the authority of inspection or supervisory personnel who can sign/stamp off 

work documents or approve articles for return to service. 

f. The repair station must also maintain employment summaries for each person whose name

appears on the rosters. Employment summaries of supervisors, inspectors, and persons 

responsible for return to service may be in the national language for repair stations located 

outside the United States. Such repair stations should describe in their manuals how they would 

provide the FAA with an English language version of employee summaries. The requirements 

for content of the employment summaries are found in section 145.161(a)(4). 

g. The following questions should be answered during development of the procedures 

concerning the rosters: 

 Who is responsible (by title) for maintaining the rosters in current condition? Has an 

alternate been designated?

 Where will the rosters be located? 

 How will the rosters be revised within 5 business days? 

Par 4-1 Page 19
AC 145-9 7/3/03 

 Is authority to approve an article for return to service shown on the rosters? Who is 

responsible for designating those individuals, and how are those individuals 

designated? 

 Are the managers, supervisors, inspectors, and persons authorized to approve articles 

for return to service all listed on the rosters?

 Are the supervisors certificated, and with what type of certificate if located outside 

the United States? 

 Are the persons authorized to approve articles for return to service certificated? 

(Each person authorized to approve articles for return to service must be certificated 

under part 65, unless located outside the United States.) 

 Are there employment summaries for each person on the roster? 

h. The following are examples of possible roster formats. 

EXAMPLE 1 

Name and Title Certificate 

Type and 

Number 

Signature and 

Initials 

Stamp Authorization

John Smith 

Chief Inspector 

A&P 12345678 A, B, C 

Jane Doe 

Receiving 

Inspector

Repairman 

789654321 

B

David Goodeye 

Final Inspector 

Repairman 

456789123 

A, C

Etc.

 2 John 

Smith,

Jane Doe, 4

JD

David 

Goodeye, DG 6

Explanation of Authorization: 

A—Authorized to approve articles for return to service 

B—Authorized to sign for a specific inspection

C—Authorized to sign for in-process and final inspection 

Page 20 Par 4-1 
7/3/03 AC 145-9 

EXAMPLE 2 

Section: III

Date Completed: 11/13/2001

Revision No. 1

Personnel 

Title: Chief Inspector/Repairman 

Authorized Signature: 

FAA Airman Certificate Held: Repairman No. 123456789 

Authorized to Sign: Log books and other approvals for return to service, Malfunction and 

Defect Reports

Kyle R. Bowman

EXAMPLE 3 

John Smith Component Repair, Inc. 

Effective Date: 11/13/2001

Supervisory and Inspection Personnel Roster 

TITLE NAME CERT. TYPE & NO. AUTHORITY

CEO John Smith N/A N/A 

Q.C. Manager Jane Smith Repairman 1234567 FPI, Machining 

Foreman Dan Jones Repairman 98765432 Machining, Cleaning

Chief Inspector David Jones N/A N/A 

Etc. 

4-2. OPERATIONS, HOUSING, FACILITIES, EQUIPMENT, AND MATERIALS. 

a. References. Part 43 and part 145, sections 145.101 through 145.109. 

b. Operations. This section of the manual should include a general description of the repair 

station operations. The manual should describe how the repair station operates, from receiving 

an article for maintenance to approval for return to service. The description could be in a 

narrative, flowchart, or other format. Any/all standard operating procedures developed for the 

facility could be included, such as contract/purchase order review, human resources, equipment 

and facilities maintenance, technical data, document control, and so forth. 

c. Housing and Facilities. This section should include a description of the housing and 

facilities, and a drawing showing the floor plan of the facility. The drawing could include the 

entrance(s), parking areas, and street locations. The drawing and description may include the 

type of heating, lighting, equipment location, shop areas, electrical, and compressed air outlets. 

Par 4-1 Page 21
AC 145-9 7/3/03 

A description of any facilities used for spray painting, avionics, engine or airframe repair, or any 

other work that would have special requirements should be included. 

d. Equipment and Materials. 

(1) The repair station must have the equipment, tools, and materials necessary to perform

the maintenance in accordance with part 43. The equipment, tools, and materials must be located 

on the premises and under the repair station’s control when the work is being done. Some of this 

equipment may be very expensive and the repair station may rarely use it. If the repair station 

does not own the equipment and it is not kept at the facility, the manual must describe how the 

equipment is obtained (i.e., lease, rental, etc.). The manual should also describe the procedure 

for ensuring the equipment is on the premises and under the repair station’s control at the time

the work is being performed. 

(2) This section of the manual should also describe where the equipment is likely to be 

used and how the repair station will comply with special handling requirements for sensitive 

tools and equipment. Some test benches and special equipment may require 

calibration/verification after relocation. This section of the manual should describe how the 

repair station ensures that required calibration/verification is performed before using the 

equipment to perform maintenance or alteration on civil aviation articles. The RSM should 

identify which department is responsible for calibrating leased tools and equipment. 

(3) The RSM must include a description of the equipment used to perform maintenance. 

For example, if the facility includes a machining area, then a generic description of the types of 

machines located in that area should be included in the manual. The description should not be so 

specific that updating equipment would result in a manual revision. The equipment, tools, and 

materials must be those recommended by the manufacturer of the article or must be at least 

equivalent to those recommended by the manufacturer and accepted by the FAA. The repair 

station may refer to a list of equipment maintained for other purposes, such as a list kept by the 

accounting department for tax purposes. The list must be available for review by the FAA. The 

list need not include the cost of the equipment or any other financial or business information. 

e. Equivalent Tools and Equipment. 

NOTE: This section is not intended to discuss industry standard tools and 

equipment (i.e., wrenches, multimeters, sockets, etc.) that are 

manufactured to a recognized industry standard. 

(1) If the repair station will be using equipment, tools, or materials other than those 

recommended by the manufacturer, the manual must explain the procedure it will use for 

determining equivalency of equipment, tools, and materials. To determine equivalency, compare 

the technical requirements of the special equipment or test apparatus recommended by the 

manufacturer with the proposed replacements. The equipment or test apparatus may look 

different, be made of different materials, be a different color, and so forth. However, the 

equipment or test apparatus must be capable of performing all necessary tests and checking all 

required parameters of the articles. The level of accuracy should be equal to or better than that 

Page 22 Par 4-2 
7/3/03 AC 145-9 

recommended by the manufacturer of the equipment/tools. Reverse engineering must include 

the data, drawings, testing, or reports necessary to determine that the article is equivalent to the 

article recommended by the manufacturer. The basis of equivalency is the requirement that the 

article meet the manufacturer’s standards and specifications in all respects regarding tolerances, 

repeatability, and accuracy. Repair stations should review the specific requirements of part 43 

before developing equivalent tools and equipment. 

(2) Standard industry practice establishes that each piece of special equipment or test 

apparatus have a unique part number and serial number to identify it within the repair station’s 

inventory system. Whether the equipment or apparatus is obtained from the manufacturer or 

produced by the repair station, it should be identified in the system for calibration and tracking 

purposes. 

(3) The following questions or concerns are offered as a guide and are intended to help 

initiate the procedures for describing the housing, facilities, and equipment in the manual(s). 

They should not be considered all-inclusive. Each facility is unique and therefore may require 

additional procedures to verify regulatory requirements and needs of the repair station. 

 Does the manual include a description of how the repair station operates?

 Does the manual include a drawing of the housing, identifying the various work 

facilities within the building(s) and giving a narrative description of the 

construction of the housing and facilities? 

 Does the description and/or layout identify areas with special requirements? 

 Does the description include a generic overview of the equipment?

 When leasing or renting equipment, does the manual contain procedures 

describing the lease/rent process and who is responsible for managing the 

program, including the required calibration/verifications? 

 How does the repair station ensure that the equipment is in place and under the 

facility’s control when the work is performed?

 If the repair station is using special equipment or tools other than those 

recommended by the manufacturer, does the manual include procedures for 

determining equivalency?

 Does the manual include a description of the stock room/area, how inventory is 

requisitioned for particular jobs, and how shelf life inventory is maintained?

Par 4-2 Page 23 
AC 145-9 7/3/03 

4-3. CAPABILITY LIST. 

a. References. Part 145, sections 145.209(d) and 145.215. 

b. A certificated repair station with a limited rating may perform maintenance, preventive 

maintenance, or alterations on an article if it is listed on a current capability list acceptable to the 

FAA or on the repair station’s OpSpecs. If the repair station chooses to use a capability list, the 

RSM must: 

(1) Contain procedures for revising the list and notifying the CHDO; 

(2) Include how often the CHDO will be notified of revisions; 

(3) Contain the procedures for the self-evaluation required under section 145.215(c) for 

revising the capability list; 

(4) Describe the methods and frequency of such evaluations; and 

(5) Contain the procedures for reporting the results to the appropriate manager for review 

and action. 

c. The capability list itself may be included as a part of the RSM or as a separate document; 

however, the procedures for revising the list and for performing the self-evaluation must be in 

the manual. 

d. Self-Evaluation. 

(1) The individual performing the self-evaluation required under section 145.215(c) 

should have the following qualifications: 

 Experience with performing evaluations (or audits if that is the method selected 

by the repair station). 

 An understanding of the requirements of part 145. 

 Knowledge of the maintenance requirements for the particular make/model of 

article to be added to the list. 

(2) The individual should follow the procedures in the RSM, using the checklists, 

working documents, and forms to record the self-evaluation. The checklists and forms may 

need to be customized for each self-evaluation. The self-evaluation should ensure that the 

repair station has the following: 

 The appropriate limited rating. 

 Adequate housing and facilities. 

Page 24 Par 4-3 
7/3/03 AC 145-9 

 Recommended tools, equipment, and materials, or equivalent. 

 Current technical data. 

 Sufficient qualified personnel. 

e. The individual conducting the self-evaluation must record the results and report them to 

the appropriate manager or management team for review and approval. The procedures should 

describe the acceptance process for the company officials and the FAA. The procedure used to 

revise the list should describe the method used to indicate any changes made to the list. Any 

deficiencies found during the self-evaluation must be corrected before the article can be added to 

the capability list. When the self-evaluation establishes satisfactory results, the capability list 

may be revised. The repair station should keep records of the self-evaluation on file for the 

period specified in the manual. For repair stations located outside the United States, the records 

of the self-evaluation may be in the national language, however, they must be made available to 

the FAA in the English language. 

f. The procedures for revising the list and notifying the CHDO should include the title of the 

person responsible for maintaining the list and communicating any revisions to the CHDO. If 

the self-evaluation was satisfactory, the capability list may be revised. The revised list and any 

other necessary technical data can be submitted with a cover letter within 5 business days to the 

PI at the CHDO. The PI will review the revisions and, if the revisions are satisfactory, signify 

acceptance by signing and dating the appropriate document. 

g. Capability list currency can be shown by a list of effective pages or equivalent document, 

which is signed by the authorized representative of the repair station and the FAA PI. 

h. If the repair station no longer wishes to maintain an article on its capability list, the article 

should be deleted. The repair station must have the necessary tools, equipment, housing, 

facilities, and trained personnel to maintain articles on the capability list at the time the work is 

performed. The procedures in the manual should describe how to delete articles from the list and 

how to forward the revised list to the FAA for acceptance. The repair station may choose to 

audit the capability list on a regular basis to ensure that it continues to have the housing, 

facilities, equipment, and technical data that meet all necessary requirements to maintain the 

articles listed in the document. Whenever equipment, tooling, personnel, and data must be 

obtained in order to perform the maintenance or alteration on an article that is going to be added 

to the capabilities list, the repair station must explain how it will ensure these items will be 

available when the work is being performed. 

i. If the capability list is maintained on electronic media, the repair station will need to work 

with the CHDO to ensure compatibility of the media, equipment, and software with that of the 

CHDO. Revision procedures will need to address documentation of approval by the company as 

well as acceptance by the FAA. 

j. The following questions or concerns are offered as a guide and are intended to help 

initiate the procedures in the manual. They should not be considered all-encompassing. Each 

Par 4-3 Page 25 
AC 145-9 7/3/03 

facility is unique and therefore may require additional procedures to verify regulatory 

requirements and the needs of the repair station. 

 What is the title of the person who will maintain the capability list? 

 How will the self-evaluation be performed? 

 Who will perform the self-evaluation?

 How will the self-evaluation be documented? 

 How will results of the self-evaluation be reported to management and how will 

management review the addition of capabilities to the list? 

 

 How will items be added to and deleted from the list? 

 

 How are changes clearly indicated on the document?

 

 If electronic media is used, is the hardware and software compatible with that of the 

CHDO?

 Where and by whom will self-evaluation reports be maintained? 

 How long are self-evaluation reports maintained? 

4-4. TRAINING PROGRAM REVISION. 

a. References. Part 145, sections 145.163 and 145.209(e). 

b. Although the training program is not required until April 6, 2005, repair stations that 

already have a training program and those that need to develop one may use the information in 

this chapter as a reference. When the training program requirement goes into effect, the RSM 

must include procedures required by section 145.163 for revising the training program. It must 

also include procedures for submitting those revisions to the CHDO for approval. 

NOTE: Repair stations located outside the United States should submit 

the repair station training program in the English language. 

c. The procedures should address who will be responsible for managing the training program

and who will be responsible for ensuring that revisions are submitted to the PI at the CHDO for 

review and approval. Procedures should include the instructions for approval by the repair 

station before submission to the FAA, as well as provisions for the FAA PI’s approval of the 

program and its revisions. 

d. The procedures should address how often the program will be reviewed to determine if it 

is current and adequate for the type of maintenance being performed at the facility. Because the 

Page 26 Par 4-3 
7/3/03 AC 145-9 

advancements in technology can cause aviation maintenance to change rapidly, a periodic review

of training needs would be appropriate. The procedures should include who will be responsible 

for planning recurrent training and any new training that may be necessary. Repair stations that 

have established a management review program should include the training program for review 

during that meeting. 

e. The training program may be documented as a section of the RSM, or as a separate 

document within the manual system. If the training program is a separate document, that 

document will need to include the procedures for submission to and approval by the FAA. 

f. The following questions or concerns are offered as a guide and are intended to help the 

repair station initiate the procedures in its manual(s). They should not be considered 

all-inclusive. Each facility is unique and may require additional procedures to verify regulatory 

requirements and the needs of the repair station. 

 Who is responsible for submitting the initial training program and its revisions to the 

FAA?

 When will the revision be submitted? 

 How will the revision be approved (include the company approval as well as FAA)? 

 How often will the training program be reviewed for currency and completeness? 

 Who will perform the review? 

 How will revisions be recorded and implemented? 

 How will the revised text be identified? 

4-5. WORK PERFORMED AT ANOTHER LOCATION. 

a. Reference. Part 145, section 145.203. 

b. The rule permits a repair station to perform work away from its fixed location on a 

temporary basis under two circumstances: (1) when a special circumstance arises, or (2) when it 

is necessary to perform such work on a recurring basis. Section 145.203(a) permits temporarily 

working away from the repair station’s fixed location due to a special circumstance, as 

determined by the FAA. Examples would be an aircraft on the ground or in preparation for a 

ferry flight. Normally, work performed at another location does not include working outside the 

domicile country where the repair station is located. However, work performed outside the 

domicile country as a special circumstance may be authorized under section 145.203(a). If it is 

necessary to perform work outside its domicile country, the repair station should obtain any 

required approvals from the country where the work is to be performed. The RSM will need to 

include a procedure on notifying the local CHDO when these special circumstances arise in order 

Par 4-4 Page 27
AC 145-9 7/3/03 

to obtain the FAA’s approval in each instance. A manual procedure for the work performed will 

not be necessary. The RSM procedures should address the following: 

 The method used for identifying the customer and describing the work requested or 

anticipated, the location at which the work will be performed, the type of material, 

equipment, and personnel that will be required to perform the anticipated work, the 

way the material, equipment, and personnel will be transported, and the precautions 

that will be taken to ensure that the material and equipment are adequate for the work 

that actually needs to be performed. 

 The title of the person who will notify the CHDO. 

 How the notification will be made. 

 How the approval/denial will be recorded and stored. 

c. Section 145.203(b) permits work away from a repair station’s fixed location when it is 

necessary to perform such work on a recurring basis. Examples of a recurring need would be a 

repair station that performs fuel tank maintenance and the work can only be performed on the 

aircraft away from the repair station’s fixed base, or the installation of aircraft seats after 

refurbishment. These are examples only; other repair stations may have their own unique 

circumstances that require the performance of maintenance functions away from their fixed base. 

A manual procedure for work performed is required if the repair station performs work at 

another location on a recurring basis. The RSM must include procedures for accomplishing 

maintenance, preventive maintenance, alterations, or specialized services at a place other than 

the repair station’s fixed location. This business practice will provide flexibility and mobility to 

meet industry needs and not be restricted “only” to special circumstances. The manual

procedures should address the following: 

 Describe the preparations and conditions to be met before performing any work away 

from the repair station. 

 Who is responsible for supervising the maintenance performed at another location?

 Are the appropriate sections of the RSM available at the remote site? 

 How does the facility ensure that adequate housing, facilities, tools, equipment, 

personnel, and current technical data are available at the site? If materials, tools, and 

equipment must be transported, how will their calibration be ensured?

 If persons unfamiliar with the work to be performed are used, does an individual 

certificated under part 65 supervise the work?

 When and how is the article inspected? Is the inspector qualified and authorized (on 

the roster)? 

Page 28 Par 4-5 
7/3/03 AC 145-9 

 How is the work recorded? Do the records meet the requirements of part 43, 

section 43.9?

 Are the forms at the repair station the same as those used at the other location?

 Who is responsible for transporting and storing the records? Where will they be 

stored?

 How does the facility ensure that each location stays in compliance with its manual 

and part 145?

NOTE: THE RULE DOES NOT ALLOW CONTINUOUS, 

UNINTERRUPTED OPERATIONS AT ANOTHER LOCATION 

WITHOUT APPLYING FOR A REPAIR STATION OR 

SATELLITE CERTIFICATE AT THAT LOCATION. 

NOTE: A combination of storing equipment, tools, parts, etc., and 

having repair station personnel permanently positioned at a site and 

performing maintenance on a daily basis away from its permanent 

fixed base indicates a continuous, uninterrupted operation. A repair 

station that operates in this fashion no longer meets the intent of 

section 145.203. If the repair station is to continue its operations in 

this manner, then it must apply for certification as a satellite or standalone repair station. 

d. Additionally, work that is to be performed at another location does not include other 

authorizations, such as having a line maintenance authorization to perform work for an air 

carrier. Work performed at locations away from their fixed base allows repair stations the 

flexibility to meet industry needs and to be mobile when necessary. Repair stations must still 

maintain a permanent fixed location even if the majority of their work is done at another facility. 

4-6. MAINTENANCE, PREVENTIVE MAINTENANCE, AND ALTERATIONS 

PERFORMED FOR AIR CARRIERS UNDER PARTS 121, 125, 129, AND 135. 

a. Reference. Section 145.205. 

b. Some repair stations perform maintenance, preventive maintenance, or alterations for air 

carriers conducting operations under parts 121, 125, 129, and 135. In this case, this section of 

the manual must describe the procedures to ensure that maintenance is performed in accordance 

with the air carrier’s program and maintenance manual. These procedures must ensure that the 

air carrier has provided the repair station with the information necessary to ensure compliance 

with this requirement. The air carrier may provide the repair station with the applicable sections 

of its maintenance program or manuals at the time the work is performed. On the other hand, the 

purchase order or other contractual documents from the air carrier could clearly state the source 

of the data (manufacturer’s or air carrier’s manual) used to perform the requested maintenance 

along with any other requirements of its program or maintenance manual. If the repair station 

Par 4-5 Page 29
AC 145-9 7/3/03 

performs an inspection for a certificate holder conducting operations under part 125, the manual 

must contain procedures to ensure the inspections are performed in accordance with the 

operator’s approved inspection program. Again, the operator may provide the repair station with 

the applicable sections of its inspection program or clearly outline the requirements on the 

purchase order. 

c. The procedures should identify who is responsible (by title) for keeping all of the 

operators’ data current, and where these manuals/sections will be located if retained at the repair 

station. The procedures also must explain what air carrier or commercial operator information 

must be available to maintenance personnel when the work is performed. Additional procedures 

will be required to ensure that purchase orders are thoroughly reviewed. This review will be 

necessary to ensure that the air carrier has clearly specified what technical data to use for 

performing the maintenance. Employees may need additional training to properly perform this 

review. The traveler or work-order system of the repair station may be used to integrate this 

information into the quality control system. If the repair station transfers requirements from the 

air carrier or commercial operator to its maintenance personnel by special instructions on the 

work order or traveler, that section of the quality control system must clearly explain how this is 

accomplished. 

d. The repair station performing maintenance for an air carrier must have an organization 

adequate to perform the work. This includes the ability to distinguish the work performed for 

different operators. Additionally, if the repair station is performing RII inspections the 

organizational structure must provide separation of maintenance and inspection personnel. The 

air carrier, not the repair station, determines the maintenance actions that are RII. If the repair 

station’s inspectors are authorized to perform RII for the air carrier, the air carrier must ensure 

that the inspectors are trained on the carrier’s RII procedures, including how the inspection is 

performed and recorded. 

(1) The inspectors performing RII for the carrier must be qualified and authorized by the 

carrier. This authorization is usually in written format, often a card carried by the inspector. The 

authorization may need to be renewed, depending on the air carrier’s procedures. The 

procedures in the RSM should include who will maintain a list of current RII inspectors, how an 

inspector is added to the list, and where the list is located. 

(2) The repair station should request information from the air carrier or commercial 

operator pertaining to at least the following issues: 

 RII. 

 Training requirements for the work being performed on the operator’s behalf, 

including who will provide the training. 

 Maintenance duty time requirements. 

Page 30 Par 4-6 
7/3/03 AC 145-9 

 Special maintenance or alteration instructions per engineering orders, build 

lists, and other methods, techniques, and practices in the operator’s manual 

per part 43, section 43.13(c). 

 Recordkeeping requirements, including who is responsible for maintaining the 

files. 

e. Line Maintenance. The FAA may authorize a certificated repair station to perform line 

maintenance for an air carrier conducting operations under parts 121, 129, and 135, provided 

that: 

 The repair station performs the maintenance in accordance with the operator’s 

manual, if applicable, and approved maintenance program. 

 The repair station has the necessary equipment, trained personnel, and technical data 

to perform the line maintenance. 

 The repair station’s OpSpecs include an authorization to perform line maintenance. 

f. If the repair station is going to perform line maintenance, its manual must include 

procedures to ensure that the necessary equipment, technical data, and trained personnel are 

available before the maintenance can be performed. This should include who, by title, will be 

responsible for ensuring that the necessary equipment, technical data, and trained personnel will 

be available when the work is being performed. 

g. The repair station’s training program can be conducted in coordination with the air carrier. 

The specific training an employee receives should be recorded in the employee’s training record. 

The procedure will need to include who, by title, is responsible to ensure that training is 

conducted and recorded. The repair station should maintain a list of individuals who are trained 

by the air carrier to perform line maintenance. Although air carrier maintenance requirements 

may be incorporated into the repair station’s training program, the repair station must follow its 

training program requirements with respect to conducting the training, recording the training in 

employee training records, and qualifying those individuals authorized to perform line 

maintenance for an air carrier. Air carrier training does not relieve the repair station from the 

requirement to ensure its personnel are trained for the maintenance it is rated to perform. 

h. Addressing the following concerns (if applicable) will initiate development of the 

procedures for performing maintenance for an air carrier: 

 Who is responsible (by title) for keeping a file of the air carrier’s procedures, 

including the necessary technical data? 

 Who is responsible (by title) for review and amendment of purchase orders for 

complete and correct instructions? Is that person trained?

 Who will maintain the list of current RII inspectors? 

Par 4-6 Page 31
AC 145-9 7/3/03 

 Does the RSM include procedures to ensure that the necessary equipment, trained 

personnel, and technical data will be available for line maintenance?

 Who is responsible for coordinating the training program with the air carrier?

 Does the repair station roster include authorization for individuals performing line 

maintenance and RII?

 How does the repair station ensure that personnel comply with its manual and 

appropriate sections of the air carrier’s manual—regardless of location?

NOTE: The authorization to perform line station maintenance for an 

air carrier is not a rating. A certificated repair station must have 

established housing and facilities. However, only the requirement to

provide suitable housing to enclose the largest type and model aircraft 

for airframe-rated repair stations has been waived by 

section 145.205(d). The FAA understands that housing and facilities 

at airports is extremely difficult to obtain and expensive to maintain. 

4-7. CONTRACT MAINTENANCE INFORMATION. 

a. References. Part 145, sections 145.209(h), 145.211(c), and 145.217. 

b. The RSM must contain procedures for maintaining and revising the contract maintenance 

information required by section 145.217. This information is required for contracting to both 

certificated and non-certificated facilities. The information required includes the approved 

maintenance function to be contracted and the name of each outside facility to which the repair 

station contracts such maintenance. If the contracted facility is certificated, the information must 

include the type of certificate and ratings. The QCM/section should describe the system and 

procedures used for qualifying and surveilling non-certificated persons who perform 

maintenance, preventive maintenance, or alterations for the repair station. These procedures may 

be contained in one manual or in separate documents that are part of the manual system. 

c. A repair station must have the material and equipment necessary to perform the functions 

appropriate to its rating. However, it need not have the tools and equipment for functions it is 

authorized to contract out pursuant to its FAA-approved list of maintenance functions. A 

REPAIR STATION MAY CONTRACT MAINTENANCE FUNCTIONS TO FAACERTIFICATED FACILITIES AND NON-FAA-CERTIFICATED SOURCES ONLY IF THE 

MAINTENANCE FUNCTIONS ARE APPROVED BY THE FAA. The repair station must 

request approval before it can contract a maintenance function. If the FAA approves the 

contracted maintenance function, the repair station can determine who will perform the 

maintenance. 

(1) The types of maintenance functions that the repair station may wish to have approved 

fall into two categories. First, the types of maintenance functions that must be contracted 

because the repair station does not have the housing, facilities, materials, or equipment available 

Page 32 Par 4-6 
7/3/03 AC 145-9 

on its premises and under its control. These may include plating, heat treatment, special NDT or 

inspection, or the maintenance or alteration of components or sub-assemblies. This list should be 

categorized broadly, such as specialized services or components of articles for which the repair 

station has the overall rating. 

(2) The repair station may also wish to provide a list of those maintenance functions for 

which it has the housing, facilities, equipment, and materials “in-house,” but may need to 

contract to another facility because of workload or emergency situations. For example, an 

airframe rated repair station may have the capability to perform maintenance or alteration on 

landing gear, but if the in-house facility cannot accomplish the work scope within a specified 

time, it may want to contract that work to another facility. It would not be able to contract the 

work unless the maintenance function of landing gear maintenance was on its FAA-approved 

list. 

(3) Additionally, the repair station may wish to provide a method for which a 

maintenance function can be added to its FAA-approved list on an emergency basis. This would 

be accomplished by explaining how the maintenance function would be added and how the FAA 

approval would be obtained in a short period of time. The repair station should coordinate 

closely with its principal inspector and its local CHDO regarding these emergency procedures. 

d. Before contracting out a function, the repair station should establish: 

 Procedures to obtain approval for the maintenance function. 

 Procedures to qualify the contractor. 

 Procedures to surveil the contractor if it is not a certificated repair station.

 A list of contractors and procedures to properly maintain that list. 

 Technical training on contracted functions for receiving inspection personnel. 

 Procedures for receiving inspections that provide enough technical detail to determine 

acceptability of an article. 

e. Contracting to FAA-Certificated Facilities. If a repair station contracts a maintenance 

function to another FAA-certificated repair station, the repair station performing the maintenance 

function is responsible for approval for return to service of maintenance performed on each 

article. The originating repair station must determine that the contractor repair station is properly 

rated to perform the maintenance. Items received from a certificated facility must be properly 

processed through the repair station’s receiving inspection procedures, since the repair station is 

ultimately responsible for all the work performed on parts used in the maintenance of the article 

being approved for return to service. 

Par 4-7 Page 33 
AC 145-9 7/3/03 

f. Contracting to Non-FAA-Certificated Facilities. 

(1) If the repair station contracts to non-FAA-certificated facilities, the repair station 

must ensure that: 

(a) The non-FAA-certificated facility follows a quality control program equivalent to 

the FAA-certificated repair station’s system with respect to the work being performed for the 

certificated repair station;

(b) The work is satisfactory by verified testing and/or inspection; and 

(c) The article is airworthy with respect to the work performed by the noncertificated source. 

(2) The repair station is responsible for approving for return to service any article on 

which work has been performed and for ensuring its airworthiness. Inspection procedures within 

the manual must enable the repair station to determine the airworthiness of the work performed 

on each article received. If the repair station cannot determine the quality of the contracted work 

by inspection or test, the work can be contracted only to an FAA-certificated facility that is able 

to inspect the work performed for compliance with part 43. 

g. Procedures. Procedures in the RSM should include the title of the person responsible for 

the contract maintenance program. The procedures must also include provisions for maintaining 

the contracting information in a format acceptable to the FAA. The information is not required 

to be in the manual, but if included, it must identify: 

 The name of each outside contracted facility. 

 The maintenance function(s) contracted to each facility. 

 The type of certificate and ratings, if any, held by that facility. 

h. The procedures in the RSM must describe how the non-FAA-certificated facility is 

initially qualified. It also should describe how the repair station ensures that the 

non-FAA-certificated facility continues to follow the quality control program for the work being 

performed on the repair station’s behalf. 

i. Procedures for coordinating communication between the repair station and the contracted 

source should be established. If the repair station performs any maintenance for an air carrier, 

the procedures should explain any special requirements (such as performing the work in 

accordance with the air carrier’s program). Procedures should describe how the repair station 

would address any problems that relate to quality or delivery. Any recurring problems should be 

addressed in the corrective action program. 

j. FAA Inspections. Maintenance contracts with non-FAA-certificated facilities must 

include provisions that allow the FAA to make an inspection and observe the non-certificated 

Page 34 Par 4-7 
7/3/03 AC 145-9 

facility’s work on that article. The RSM should include procedures to ensure that contracts 

contain the provision for FAA inspections. The individual in charge of the contract maintenance 

program or a delegated assistant/auditor may be required to accompany the FAA during these 

inspections. These inspections will determine if the repair station is able to continue to contract 

the maintenance function(s) to a non-certificated source. 

k. The following questions or concerns are offered as a guide and are intended to help 

initiate the procedures in the RSM(s). They should not be considered all-inclusive. Each facility 

is unique and may require additional procedures to verify regulatory requirements and the repair 

station’s needs. 

 Who, by title, is responsible for the contract maintenance program?

 What is the title of the person responsible for maintaining the list of contract 

maintenance functions?

 What is the title of the person responsible for maintaining the list of facilities to 

which maintenance functions are contracted?

 What is the title of the person responsible for forwarding revisions of the lists to the 

CHDO?

 How will the CHDO approve additions to the list of maintenance functions?

 When will the CHDO be notified of revisions to the list?

 How will the CHDO be notified?

 If the list is maintained on electronic media, does the CHDO have compatible 

hardware and software to review/refer to the contract maintenance list and 

procedures? 

 Who will maintain current copies of the Air Agency Certificates and OpSpecs for the 

certificated contract facilities (initial as well as revisions)?

 Do the contract provisions for non-FAA-certificated facilities include provisions for 

FAA inspection?

 How will non-FAA-certificated maintenance contract providers be qualified?

 How often will the repair station surveil the non-FAA-certificated sources? 

 Are the auditors that inspect contract maintenance sources trained?

 How is the receiving inspection performed on articles returned after maintenance 

from certificated and non-certificated sources? 

Par 4-7 Page 35
AC 145-9 7/3/03 

 Are the receiving inspectors properly trained?

 Do the receiving inspectors have the appropriate technical data to determine 

airworthiness? 

 What criteria are used to determine if the contracted source is meeting all 

requirements?

 Are discrepancies with contracted sources included in the repair station’s corrective 

action program?

4-8. PROFICIENCY OF INSPECTION PERSONNEL.

a. References. Part 145, sections 145.211, 145.155, 145.157, and 145.161. 

b. Requirements of Inspection Personnel. 

(1) This section of the manual must include procedures for establishing and maintaining 

proficiency of inspection personnel. Section 145.155 requires the repair station to ensure that 

inspection personnel are thoroughly familiar with the following: 

 Applicable regulations. 

 Inspection methods, techniques, practices, aids, equipment, and tools used to 

determine the airworthiness of the article. 

(2) Inspection personnel must also be proficient in using the various types of inspection 

equipment and visual inspection aids appropriate for the article being inspected. Inspectors must 

be listed on a roster and also understand, read, and write English. 

c. Procedures in this section of the manual should address how the repair station will 

establish the qualifications of the inspection personnel. This initial qualification may be based 

on testing or previous experience or training. If the inspector has previous experience, the 

employment records should describe the type of inspections and maintenance work performed, 

methods and techniques used, and total years of experience as an inspector, as required by 

section 145.161. The procedure should establish the minimum amount of experience required 

before an inspector can be listed on the roster, and who by job title will make that determination. 

d. The procedures should also describe how inspectors become qualified through “on-the-job 

training” (OJT) and/or formal classroom training. This training may be described in this section 

of the manual or in the section describing the training program for all repair station personnel. 

Training should include initial qualification as well as recurrent training or testing to maintain 

proficiency. Inspection personnel may also require additional special training in new techniques. 

This may be necessary after additional components are added to the ratings or capabilities of the 

repair station or when new inspection aids or techniques are applied. Inspectors performing 

Page 36 Par 4-7 
7/3/03 AC 145-9 

Nondestructive Testing (NDT) may need to meet the qualification requirements of other industry 

standards, such as eye exams. 

e. Inspection personnel need current technical data to properly perform their tasks. They 

need to understand current specifications involving inspection tolerances, limitations, procedures 

established by the manufacturer, SBs, and ADs. Inspection personnel also need to be familiar 

with the RSM and QCM for the repair station, as well as the applicable federal aviation 

regulations. Procedures in the manual should address where the technical data is located, who is 

responsible for maintaining the current data, and how the inspectors will be made aware of 

changes. 

f. If the person performing the final inspection is also authorized to approve an article for 

return to service, that person must be certificated under part 65 for repair stations located within 

the United States. If the repair station is located outside the United States, the person authorized 

to perform a final inspection and approve an article for return to service must meet the 

requirements of section 145.157. If final inspection personnel are authorized to approve an 

article for return to service, procedures in the manual will need to address how they are 

authorized and qualified. 

g. The following questions or concerns are offered as a guide and are intended to help 

initiate the procedures in the QCM. They should not be considered all-inclusive. Each facility is 

unique and may require additional procedures to verify regulatory requirements and the needs of 

the repair station. 

 How does the repair station establish minimum qualifications for inspection 

personnel? What is the title of the person making this determination?

 How will the inspector maintain proficiency? What methods are used? 

 Do the records of training indicate the method, length, instructor, and dates? Are they 

current? 

 Do the employment records of the inspectors describe any previous experience?

 Is the necessary current technical data available and accessible for the inspectors?

 What is the title of the person responsible for ensuring that inspectors maintain 

proficiency? 

 Are the inspectors listed on the roster? 

 Do the inspectors read, write, and understand English?

 Are the persons performing RII inspections and approvals for return to service 

certificated under part 65 (if in the United States)?

Par 4-8 Page 37
AC 145-9 7/3/03 

 Will the inspectors require any special training, such as NDT? Who will be 

responsible for the training? How will the repair station ensure that NDT personnel 

continue to meet any required industry standards?

4-9. CURRENT TECHNICAL DATA. 

a. References. Part 43, section 43.13(a), and part 145, sections 145.201(c) and 145.211(b). 

b. This section of the manual must contain the procedures for ensuring that current technical 

data is available for the scope of work the repair station is performing. Section 43.13(a) requires 

each person performing maintenance, alteration, or preventive maintenance to use the methods, 

techniques, and practices prescribed in the current manufacturer’s maintenance manual, 

Instructions for Continued Airworthiness (ICA), or other methods, techniques, or practices 

acceptable to the Administrator. Section 145.201(c) states that a certificated repair station may 

not approve for return to service any article unless the maintenance, preventive maintenance, or 

alteration was performed in accordance with the applicable approved technical data or data 

acceptable to the FAA. 

c. The technical data used by repair stations could include any of the following: 

 FAA technical data (such as ADs, Type Certificate Data Sheets, etc.). 

 Manufacturer’s technical data (such as maintenance manuals and SBs). 

 Engineering data (such as DER-approved data or data developed by the repair station 

and approved by the FAA). 

d. The data used by the repair station to perform a specific maintenance function must be 

current and available to maintenance and inspection personnel when the maintenance is being 

performed. The procedures should ensure that someone in the facility is responsible for 

maintaining the technical data in a current condition. Status of the manuals may be confirmed by 

making periodic phone calls to the manufacturer, etc. The procedures should ensure that any 

subscriptions to required technical data are renewed as necessary. The procedure should 

describe how the revised technical data will be inserted into existing documents and how the 

appropriate individuals in the repair station will be notified about revisions. 

e. In some repair stations, the technical data is issued in the form of controlled documents. 

Procedures for these facilities will need a complete description of the document control system, 

including distribution, accountability, and availability. Document control procedures may 

include: 

 Approval of the documents before distribution. 

 Identification of changes. 

Page 38 Par 4-8 
7/3/03 AC 145-9 

 Provisions to ensure that relevant versions of applicable documents are available at 

points of use. 

 Provisions to ensure that documents of external origin are identified and controlled. 

 Procedures to prevent the use of obsolete documents. 

f. Larger repair stations may include provisions for distributing data from a master library to 

individuals or shop libraries throughout the facility. The procedure must ensure accurate and 

timely distribution of the material. Additional procedures will need to address who revises the 

shop library documents, how the documents are revised, and how the information is distributed. 

g. Repair stations that are associated with or part of a production approval holder facility 

often use the manufacturer’s drawings and data to perform maintenance. This data may not meet 

the requirements of section 43.13(a). These facilities should also be cautioned that the parts 

manufactured by the production side of the facility cannot be used by the repair station unless the 

parts are FAA-approved through a Parts Manufacturer Authorization (PMA), Technical Standard 

Order (TSO), Type Certification (TC), or other means. 

h. Technical data used by repair stations located outside the United States may be translated 

into the national language. If the data requires translation before distribution, the procedures 

must ensure an accurate, timely, and complete translation. Provisions should be made for quality 

control personnel to review and approve the translated material before distribution. The 

technical data that needs to be translated may include graphs, diagrams, or other visual aids. The 

repair station must retain in English any data that demonstrates compliance with the 

requirements of part 43. 

i. Those facilities that use computer software for component testing (of airborne systems or 

equipment, avionics systems, engines, etc.) will need to include procedures describing how 

revisions/updates are made and how the current software is distributed. The procedures will 

need to address system security to prevent inadvertent changes to the software and methods to 

ensure that only the current revision/version of the software is used. Distribution and revision of 

software is often handled by a group other than those responsible for revision and distribution of 

paper documents. 

j. The following questions or concerns are offered as a guide and are intended to help initiate 

the procedures in the manual. They should not be considered all-inclusive. Each facility is 

unique and may require additional procedures to verify regulatory requirements and the needs of 

the repair station. 

 What is the title of the person responsible for revising and maintaining the technical 

data?

 How does the repair station ensure that the data is current? 

 How is the technical data distributed throughout the company?

Par 4-9 Page 39
AC 145-9 7/3/03 

 How does the repair station ensure that current technical data is available to the staff?

 What is the title of the person responsible for control and distribution of the 

documents from a master library to the shop/office libraries located in the facility?

 If the technical data requires translation, who is responsible for performing the 

translation and quality checks? How will the data be revised and distributed?

 If the repair station uses computer software for component testing, who is responsible 

for maintaining the software, and how are revisions made and distributed?

4-10. INSPECTION AND QUALITY CONTROL SYSTEM. 

a. References. Part 145, sections 145.211 and 145.213. 

b. This section of the manual must include a description of the system and the procedures 

used for: 

 Inspecting incoming raw materials to ensure acceptable quality. 

 Performing preliminary inspections of all articles that are maintained. 

 Inspecting all articles involved in an accident for hidden damage. 

 Performing the final inspection and approval for return to service of maintained 

articles. 

c. The concerns or questions in the following paragraphs are offered as a guide and are 

intended to help initiate the inspection procedures in the QCM/section. They should not be 

considered all-inclusive. Each facility is unique and may require additional procedures to verify 

regulatory requirements and the needs of the repair station. 

d. General. Describe the inspection system in detail, from establishing the purchase of 

aviation articles and how that material is inspected upon receipt, receiving customer’s articles, 

progressing through each inspection step, and ending in final inspection and approval for return 

to service. Describe each step in a format easily understood by the employees. A flowchart may 

be helpful in developing these procedures. This section should also describe the system for 

controlling and documenting the work in process (work order system). 

e. Reporting Malfunctions or Defects. Part 145, section 145.221 requires the repair station 

to notify the FAA within 96 hours after discovering any failure, malfunction, or defect of an 

article. This report must be in a format acceptable to the FAA. Many repair stations use FAA 

Form 8010-4, Malfunction or Defect Report, to comply with this requirement. Information for 

completion of this form maybe found in AC 20-109, as amended. Examples of the types of 

information received on these reports may be found in AC 43-16, Aviation Maintenance Alerts, 

as amended. The regulation also states that the repair station may submit a Service Difficulty 

Page 40 Par 4-9 
7/3/03 AC 145-9 

Report—Aeronautical Equipment, FAA Form 8070-1, for a certificate holder operating under 

14 CFR parts 121, 125, or 135. Information for completion of Form 8070-1 is attached to the 

form. The repair station should not report the same failure, malfunction, or defect using more 

than one report. The manual should contain procedures describing how the report will be 

completed and forwarded to the FAA. A copy of the form and instructions for its completion 

should be included in the forms section of the manual. 

f. Continuity of Inspection Responsibility. Include procedures for ensuring that the 

responsibilities of its inspectors are properly performed if they cannot complete the task. If the 

facility uses multiple shifts, include procedures to ensure a continuing responsibility for 

maintenance in progress with status books, shift change logs, or similar documents. 

g. Receiving Policy. This section of the manual should address the procedures used for 

accepting consumable materials and customer parts. Procedures included within this section will 

depend on the size, complexity, and ratings of the facility. The manual should describe generally 

how material is ordered, stocked, and requisitioned for maintenance or alteration purposes. A 

general description of how the stock room operates with respect to handling and storage should 

be included in this section. Additionally, this section may include the method for handling, 

storing, and using shelf life items and materials. 

(1) Procedures should include visual inspection of the container and contents for 

shipping damage, packing, and proper paperwork. This section should include procedures to 

assist receiving personnel in performing their tasks, whether the article was satisfactory or 

damaged when it was received. The procedures would normally include how receiving 

personnel document or record damage due to improper handling and the title of the person 

notified of the damage. The description of the procedure may include the routing of materials 

and parts. 

(2) Receiving personnel may need to review paperwork received with articles maintained 

by other facilities contracted by the repair station or parts received from foreign manufacturers 

(refer to AC 20-62, Eligibility, Quality, and Identification of Aeronautical Replacement Parts, as 

amended). The procedures should address the required contents of the documentation (forms, 

travelers, certifications, etc.) received from the contracted facility. 

(3) The contracting section of this AC has further information on contracting 

maintenance functions. The procedure should also cover how parts are stored and requisitioned 

for particular work. 

h. Handling of Parts. Part 145, section 145.103(a) requires the repair station to provide 

sufficient space to segregate articles and materials stocked for installation from those articles 

undergoing maintenance, preventive maintenance, or alterations. Throughout the maintenance 

cycle, care will be necessary when handling parts and components undergoing maintenance. The 

procedures in the manual should emphasize that personnel will always need to exercise caution 

when handling aviation articles. These procedures may be contained in one section of the 

manual or may be spread out through several sections of the manual. The procedures may 

discuss segregation and protection of parts, avoiding metal-to-metal contact, contamination, and 

Par 4-10 Page 41
AC 145-9 7/3/03 

preservation. Moving articles from one area of the repair station to another requires procedures 

to ensure that articles are not damaged in transit. Facilities that maintain sensitive electronic 

equipment will need to describe the necessary precautions to be taken for static discharge. 

i. Tagging and Identification. All articles undergoing maintenance within the facility 

should be identified in some manner depending on the size, complexity, and ratings of the repair 

station. Many facilities attach colored tags or work orders to the part. The objective of 

identification is to ensure that the status of any article can be easily determined. Articles 

awaiting repairs may be identified differently than those that are repaired. Articles that are 

deemed non-repairable should be clearly identified, and may need to be stored in a segregated 

area within the facility. Parts in the store room(s) will need to be identified to ensure traceability 

to an approved source. 

j. Incoming Inspection. The QCM/section must include procedures that describe the 

incoming inspection of raw materials used by the repair station for maintenance, preventive 

maintenance, or alteration. These materials could include hardware, sheet metal, welding rods, 

etc., as well as component parts. The procedures should define what is considered raw material 

and describe how the material will be inspected. Procedures should describe the 

disposition/action taken when an item passes or fails inspection. The manual should also include 

procedures for handling suspected unapproved parts. Some raw materials may require specific 

documentation or certifications that must be kept on file by the repair station. Procedures should 

address how this documentation is reviewed and filed. Sometimes, raw materials are received in

lots that are released from stock in smaller units, such as weld wire, NDT fluids and films, and 

coating powders. For such situations, the manual will need to include procedures that insure 

traceability of the material back to the original lot. The procedures should address the following, 

as applicable: 

 What is the title of the person(s) performing these inspections?

 How will the inspection be performed? Does the inspection include visual, NDT, or 

dimensional tolerances (if applicable)?

 What technical data will be necessary to perform this inspection? 

 Is the material checked for damage, identification, and preservation?

 Does the material have any shelf life limitations? If so, the procedures need to 

address how the material will be identified and controlled. 

 Describe the action taken if the material meets specification, as well as what action is 

taken if the material does not meet specification. 

 Does the facility have an area for proper storage of raw materials? Will the material 

require a secure area until released for use? Will the material require any special

environmental considerations during storage? 

Page 42 Par 4-10 
7/3/03 AC 145-9 

 How is the material identified if acceptable or not acceptable? 

 Do the materials require any special testing requirements? If so, what procedures are 

followed to perform those tests? How is the testing performed? 

 What is the disposition of incoming inspection records?

 How does the repair station ensure traceability of materials received in lots, such as 

weld wire, coating powders, and so forth?

 What are the procedures for detecting and reporting suspected unapproved parts?

k. Preliminary Inspection. The procedures must address what constitutes a preliminary 

inspection, how that inspection will be performed, and how the article will be identified 

throughout the repair cycle. This inspection is usually an evaluation of an article to determine 

the customer requested work scope and the required maintenance or alteration actions. 

Compliance with SBs and ADs should also be determined. This inspection may involve a 

teardown or disassembly if the article is an engine, module, propeller, accessory, or subassembly 

of a larger component. The results of this inspection should be documented and may need to be 

communicated to the customer. The forms used to record this inspection should identify the 

article until the maintenance/repair cycle is completed. For some repair stations this may include 

attaching the form to the article while it is still in the repair cycle. Other repair stations that use 

more electronic means, such as bar codes, may not need to physically attach the form but another 

type of identification so that the status of the article can be determined as needed. Any defects or 

discrepancies noted during this inspection will need to be connected with corrective actions 

taken during the maintenance, using a discrepancy numbering system or similar arrangement. 

The repair station should notify the customer of any defects that are outside the scope of the 

customer’s authorized repair. Maintenance providers are responsible only for the work they are 

contracted to perform, not for all the work that needs to be performed. The procedures should 

address the following: 

 Who (by title) will perform this inspection?

 How will the inspection be performed? 

 When is this inspection performed?

 Is the repair station properly rated to perform this maintenance? 

 Does the inspection include a functional test before disassembly?

 How will the inspection be recorded? 

 If the inspection reveals discrepancies, how are they recorded? 

Par 4-10 Page 43
AC 145-9 7/3/03 

 How does the repair station record corrective actions taken to correct any 

discrepancies? 

 Do the records show the relationship between the discrepancies found and the 

corrective action taken?

 How is the customer notified of discrepancies found that are outside of the contracted 

work scope? How are those discrepancies resolved?

 Is the record of this inspection made part of the work order file (work package)?

 How is traceability of life limits and/or time since overhaul documented? 

 How are the parts identified if acceptable and if not acceptable? 

 What are the procedures to ensure the records (work package) are kept with the parts? 

 Is there a procedure to ensure that current technical data is available before 

inspection?

 What are the procedures for detecting and reporting unapproved parts?

 Is there a procedure for reporting failures, malfunctions, or defects of an article? 

l. Hidden Damage Inspection. This inspection is required on parts that have been involved 

in an aircraft accident. The inspection includes a search for any secondary damage that could 

result from an accident, such as fire or heat damage. This inspection is often recorded on the 

same form used for the preliminary inspection. Sometimes the repair station is not notified that 

an article has been involved in an aircraft accident. Inspection personnel should be experienced 

enough with the article to recognize damage that is suspicious. The repair station could then 

initiate communications with the customer regarding damage history of the article. The hidden 

damage inspection should address the following: 

 Who (by title) will perform the inspection?

 How will the inspection be recorded? 

 If defects are noted, where will they be recorded? 

 Does the inspection include areas adjacent to obvious damage? 

 Who will communicate with the customer? 

 Is the record of this inspection made part of the work order file?

Page 44 Par 4-10 
7/3/03 AC 145-9 

m. In-Process Inspection. 

(1) These inspections may take place during various stages of disassembly, repair, and 

reassembly of an article. These inspections are usually described in the maintenance manuals or 

other ICA used to perform the maintenance or alteration and called out on the work order, 

traveler, or router. Usually, they require the services of a qualified inspector to perform a visual, 

dimensional, or non-destructive test. The inspection may require functional tests and/or 

precision test equipment. Persons performing these inspections should be qualified and listed on 

the roster. 

(2) If the article has been shipped to another facility for contracted maintenance, the 

inspection process must include an inspection of the contracted maintenance function performed. 

The inspector may also review the documentation received from the vendor, such as 

certifications(s) or other maintenance records required by section 43.9. If a non-certificated 

person performed the maintenance, an inspection and/or test is required to determine whether the 

maintenance was performed satisfactorily. 

 Who (by title) will perform the inspection?

 Are the inspectors listed on the roster? 

 How will the inspection be recorded? 

 If defects or discrepancies are noted, where will they be recorded? 

 Do the procedures allow steps to be performed out of sequence? If so, how is this 

authorized and recorded? 

 If the in-process inspection is not satisfactory, does the manual have procedures 

governing rework? Any rework must be performed in accordance with approved 

or acceptable technical data. 

 Does the system include provisions for recording the names of the inspector and 

the person who performed the work? 

 Are the records of this inspection made part of the work order (records package)?

 Who determines when an in-process inspection is performed, and how is that 

determined? 

 Do the procedures describe the inspection of an article and review of 

documentation for maintenance performed by a contracted facility?

n. Final Inspection. This inspection is performed on each article before it is approved for 

return to service. Final inspection should include a review of documents used during the 

maintenance (travelers, inspection sheets, discrepancy sheets, etc.) as well as an inspection of the 

Par 4-10 Page 45 
AC 145-9 7/3/03 

article. The repair station may develop a checklist to ensure that all activities related to final 

inspection are performed. The individual performing this inspection must meet the requirements 

of section 145.155, which requires the person to be thoroughly familiar with the applicable 

regulations and the inspection methods, techniques, practices, aids, equipment, and tools used to 

determine airworthiness of the article. The person must be proficient in using the various types 

of inspection equipment and visual inspection aids appropriate for the article being inspected. 

The person must be able to understand, read, and write English. As stated in section 145.213, 

except for individuals employed by a repair station located outside the United States, only an 

employee certificated under part 65 is authorized to sign off on final inspections and 

maintenance releases for the repair station. 

 Who (by title) will perform the inspection?

 How will the inspection be recorded? 

 If the final inspection is not satisfactory, does the facility have procedures governing 

rework? Any rework must be performed in accordance with approved or acceptable 

technical data. 

 Is the inspector qualified and certificated? 

 Before the final airworthiness determination is made, are all other maintenance, 

inspection forms, electronic media, and records checked for completion? How is this

indicated?

 Is the final inspector authorized on the roster of inspection personnel?

 How is the inspection performed?

 Once the final inspection is completed, how are the parts identified?

 Are the final inspection personnel familiar with the regulations and the inspection 

techniques? 

 Do the inspectors understand, read, and write English?

 Do the final inspectors have access to current technical data? 

 Are procedures included for when the final inspection results in accepting the part 

and when it results in rejection of the part?

 If the repair station performs 100-hour and/or annual inspections, are procedures 

included for addressing the use of inspection cards and/or forms, checklists, etc., to 

record the inspection and correct any discrepancies? Are procedures for deferral of 

inoperative equipment if the operator has an FAA-approved minimum equipment list 

also included?

Page 46 Par 4-10 
7/3/03 AC 145-9 

 If the maintenance performed was a major repair or major alteration, are procedures 

included to ensure that the inspector who inspects the article and approves it for 

return to service is trained, qualified, and authorized?

o. Work Sign-Off.

(1) Many repair stations use rubber stamps or electronic media instead of signatures to 

annotate the completion of a task on a traveler, work order, process sheet, inspection sheet, or 

similar document. The intent of the stamp or electronic sign-off is to ensure traceability to the 

name of the person who performed or inspected the work. The stamp or electronic sign-off used 

is often more legible than hand-written initials. If the repair station chooses to use stamps or 

electronic media, it should have a control program that addresses the following: 

 Who issues the stamps, badges, or authorizations? 

 What procedures are used to ensure that the method used can be traced to the 

individual who issued the authorization (a list of names and stamps, or similar 

document)? 

 Are there procedures to check that the stamps, if used, are still legible?

 Are there procedures to ensure that the stamp, badge, or authorization is returned 

to or revoked by the responsible manager upon termination or re-assignment of an 

employee? 

 Are procedures and training on the security of the system used (stamps or 

electronic)? 

(2) Exemptions from the regulations will no longer be required to use electronic media 

because the rule allows the use of electronic systems. The repair station must have procedures 

that fully describe the system and its use. 

p. Maintenance Release and Approval for Return to Service.

(1) The maintenance release document must meet the requirements of part 43, 

sections 43.9 and 43.11. Many repair stations have chosen to use FAA Form 8130-3 as a 

maintenance release. Instructions for completion of FAA Form 8130-3 are in Order 8130.21, as 

amended. Those facilities that are Joint Aviation Authorities (JAA) certificated must use FAA 

Form 8130-3 as a maintenance release for articles returned to JAA member countries. 

(2) Regardless of the format, the contents must include: 

 A description (or reference to data acceptable to the FAA) of the work performed. 

In either case there must be enough information provided so that a person 

unfamiliar with the work would be able to determine the extent of the 

maintenance and/or alteration performed. If the repair station is also 

Par 4-10 Page 47 
AC 145-9 7/3/03 

JAA-certificated, the maintenance release must include the revision status of the 

technical data used to perform the work. The maintenance release also should 

include a record of the parts used, particularly if the maintenance involved the 

substitution of parts, such as PMA parts. 

 The date the article is approved for return to service. 

 The name of the person who performed the work (in this case the repair station). 

 The name of the individual authorized by the repair station to approve the article 

for return to service. As required by section 145.157, for repair stations located 

within the United States, the person authorized to approve an article for return to 

service must be certificated under part 65. 

 If the maintenance was performed on an article that is life-limited, include the 

total time and total cycles. If the article requires periodic overhaul under an air 

carrier or commercial operator’s maintenance program, include the time since 

overhaul. 

(3) If the repair station is performing maintenance for an air carrier, the repair station

should follow the maintenance release procedures described in the air carrier’s manual. The 

forms and procedures may differ from those the repair station normally uses. 

(4) The approval for return to service may be a separate document, included in the work 

order, or entered into the aircraft maintenance records. If the maintenance was a major repair, 

the repair station may use a work order instead of FAA Form 337 to record the work and approve 

the article for return to service (see section 43, appendix B for details). If the maintenance 

performed was a major alteration, the repair station must use FAA Form 337 to record the work 

and approve the work performed for return to service. AC 43.9-1, as amended, describes how to 

complete FAA Form 337. If the repair station chooses to use FAA Form 337, a copy of the form

and instructions for its completion should be included in the forms section of the manual. 

 

(5) Procedures for approval for return to service should include the following (as 

applicable): 

 Who (by title) is authorized to complete the form? How is the individual 

authorized? 

 Is the person certificated under part 65 if employed by a U.S. repair station?

 Do the procedures ensure that a qualified and authorized person can assume the 

responsibilities of this task if the person who normally performs it is not available 

(e.g., sick, on vacation, etc.)?

 Does the maintenance release include or reference a list of approved parts?

Page 48 Par 4-10 
7/3/03 AC 145-9 

 How does the repair station ensure that it approves for return to service only those 

articles for which it is rated?

 How does the repair station determine if the repair or alteration is major? If the 

maintenance was a major repair or major alteration, how will it be recorded? 

 Who (by title) is authorized to complete FAA Form 337, and how is that person 

authorized? 

 What records are given to the customer, and what records are maintained on file 

at the repair station?

 Have the people that complete the approval for return to service been trained for 

this position? Is the training documented?

4-11. REQUIRED RECORDS AND RECORDKEEPING. 

a. References. Part 43, section 43.9, and part 145, sections 145.209(i) and 145.219. 

b. The RSM must include a description of the required records and the recordkeeping system

used to obtain, store, and retrieve those records. The records must be in English and comply 

with part 43. 

c. Section 43.9 describes the content, form, and disposition of maintenance, preventive 

maintenance, and alteration records. The content must include a description of the work 

performed, the date the work was completed, and the name of the person performing the work. It 

also must include the signature, certificate number, and type of certificate of the person 

approving the work for return to service. For major repairs made in accordance with an FAAapproved manual or other approved data, the repair station may use the customer’s work order to 

record the repair or use FAA Form 337. The repair station must use FAA Form 337 to record 

major alterations. Instructions for completion of FAA Form 337 are in AC 43.9-1, as amended. 

d. Records may be in different formats depending on the type of work performed. Samples 

of the various forms that are part of the repair station’s records must be included in the manual or 

can be maintained in a separate “forms” manual. 

e. Maintenance record entries for an air carrier should be completed in accordance with the 

air carrier’s procedures. The entries may include the use of forms specifically required by the air 

carrier. The procedures, forms, and records may differ from those normally used. 

f. The procedures should describe the contents of the facility’s work package, if applicable. 

This work package may include a traveler or router that describes each step of the maintenance 

or alteration performed. It may contain areas for the signatures or identifiers such as stamps, bar 

codes, badge numbers, and electronic signatures of the person performing the work and of the 

inspector. If the facility performs aircraft inspections, the records should include the checklist 

used to perform the inspections, discrepancy lists, and corrective actions needed and/or taken, 

Par 4-10 Page 49
AC 145-9 7/3/03 

including compliance with any ADs and/or SBs. If the repair station performs repairs in 

accordance with DER-approved technical data, a copy of FAA Form 8110-3 should be included 

in the records package. DER-approved technical data will normally require additional FAA 

approval when used for major alterations. (See FAA Order 8110.37, Designated Engineering 

Representative (DER) Guidance Handbook, for DER authorization. Supplemental forms in a 

work package may include, but are not limited to: 

 A list of replacement parts. 

 Inspection methods sheets. 

 SB and/or AD compliance sheets. 

 Copies of manufacturer’s technical data. 

 Functional test and/or calibration results. 

g. The repair station must provide a copy of the maintenance release to the owner/operator. 

If the repair station chooses to use FAA Form 8130-3 as a maintenance release, the records must 

include a copy of the completed form. The procedures should describe who would review the 

records for accuracy and completeness before approval for return to service, unless that 

information is included elsewhere in the manual. 

h. Records must be made available to the FAA and the National Transportation Safety Board 

(NTSB). Records should be organized for easy retrieval. Procedures should describe the 

location of the records and the system used to retrieve those records. Some repair stations store 

records in a remote location. The manual must include procedures describing its retention 

interval and retrieval process. Storage provisions should include environmental protection as 

well as security. 

i. The procedures should include the title of the person responsible for maintaining the 

records for the repair station and where the records will be located. The records must be 

maintained for at least 2 years from the date the article was approved for return to service. The 

customer purchase order or contract may require storage for a longer period of time. 

j. Electronic Recordkeeping Systems. 

(1) When constructing an electronic recordkeeping system, several elements must be 

considered and addressed in the RSM or within the directions for use of the electronic system. 

Those directions must be available to each person using the system. The electronic system must 

ensure confidentiality of the information and ensure that it is not alterable in an unauthorized 

way. 

(2) Before introducing an electronic system, a computer operation procedures manual 

should be established. The manual should include the following: 

Page 50 Par 4-11 
7/3/03 AC 145-9 

 Procedures for making required records available to the NTSB and/or FAA 

personnel. An employee or a representative who is familiar with the computer 

system may need to assist NTSB or FAA personnel in accessing the computerized 

information. The computer system must be capable of producing paper copies of 

the viewed information at the Administrator’s request.

 A procedure for conducting a review of the computerized personal identification 

codes system to prevent password duplication (if applicable). 

 Procedures for periodic audits of the computer system to ensure the integrity of 

the system and each workstation. 

 A procedure to ensure that any records for an aeronautical product are transferred 

to the owner/operator with the required information in an acceptable format, 

either electronically or on paper. 

 A description of the training procedure and requirements needed for access to the 

computerized system. 

 Procedures addressing periodic backup of records and files. 

(3) The repair station must provide a copy of the procedures for implementing an 

electronic recordkeeping system to the CHDO. The FAA addresses guidelines and requirements 

for electronic signatures in AC 120-78. 

(4) Addressing the following questions or concerns (as applicable) will help the repair 

station develop procedures for this section. The repair station may need to develop additional 

procedures, depending on the size and complexity of the facility. 

 Who (by title) is responsible for maintaining the recordkeeping system? 

 What documents are included in a typical records package? What additional 

forms may be included?

 Where are the records stored? 

 What method is used to organize the records? 

 Are the records easily retrieved?

 Who (by title) reviews records for accuracy and completeness before approval for 

return to service? Is the individual trained? 

 If the FAA Form 8130-3 is used, does the repair station include a completed copy 

in the records package? 

Par 4-11 Page 51
AC 145-9 7/3/03 

 If electronic records are used, procedures for security, backup, and retrieval of 

files must be established. 

 Are the records in English, and do they meet (at a minimum) the requirements of 

section 43.9?

 What records will be provided to the owner/operator?

 How will the repair station process records received from contractors?

 Are procedures included for distribution and storage of FAA Form 337?

 How does the repair station document any special inspections, such as hydrostatic 

tests, functional tests, and so forth?

4-12. CALIBRATION OF MEASURING AND TEST EQUIPMENT. 

a. References. Part 43, section 43.13(a), and part 145, sections 145.211(c) and 145.109(b). 

b. Section 145.211(c) requires that the repair station QCM contain the procedures used for 

calibrating measuring and test equipment, including the intervals at which the equipment will be 

calibrated. Part 145, section 145.109(b) states that a certificated repair station must ensure that 

all test and inspection equipment and tools used to determine airworthiness of articles are 

calibrated to a standard acceptable to the FAA. 

c. This section of the manual should explain the repair station system for controlling and 

performing calibration of the precision tools and test equipment used to make airworthiness 

determinations, sometimes referred to as Measuring Tools and Equipment (MTE). The repair 

station is responsible for the calibration program, whether calibration is performed in-house or 

contracted to outside sources. The calibration must be traceable to a standard acceptable to the 

FAA, which includes those recommended by the manufacturer and the National Institute of

Standards and Technology (NIST) or other national authority. The measuring equipment must 

be calibrated at regular intervals, which are established by the manufacturer or the repair station. 

The repair station should maintain records of the calibration for at least 2 years. 

d. The repair station should maintain a list of calibrated equipment by name, model or part 

number, serial number, date of calibration, and next calibration due date. If the repair station 

allows employee-owned measuring and test equipment to be used in the facility, these tools must 

be included in the calibration system. Many facilities choose to maintain the calibration system

records and techniques on a computer. A computerized list enables those facilities to manage a 

large list of equipment requiring periodic calibration. The individual performing the calibration 

will need to have experience and/or training on the computer system as well as on calibration 

techniques. 

Page 52 Par 4-11 
7/3/03 AC 145-9 

e. Personnel calibrating tools and equipment will need to have the knowledge, training, or 

experience necessary to ensure proper calibration. Records of the training or experience will 

need to be in each employee’s training file or employment summary. 

f. Procedures will need to address how and when the equipment is recalled for calibration 

and the title of the person responsible for ensuring that the equipment is returned to the 

calibration technician. The procedures should also describe how the facility determines 

calibration status of a new tool or piece of equipment before it is put into service. 

g. Calibration Records. 

(1) Calibration records should include the following: 

 The name of the person who performed the calibration. 

 Date of calibration. 

 Date next calibration is due. 

 The standard used to perform the calibration. 

 The method used to perform the calibration. 

 The results of the calibration. 

(2) The results of the calibration should include the actual readings of the equipment at 

the test points. If the station intends to revise calibration intervals, pass or fail notations will not 

suffice. The calibration interval cannot be increased without sufficient recorded data points 

(calibration history) to justify a change. The procedures should state the title of the person 

responsible for maintaining the records and where the records will be maintained. 

h. If the repair station calibrates its own equipment, a series of gage calibration techniques 

should be developed. These techniques should describe exactly how the tool or equipment is 

calibrated, including the standard used, test points, accuracy required, and records. The 

techniques could be those recommended by the manufacturer or an industry standard acceptable 

to the FAA. The technique may include provisions to safeguard the equipment from adjustments 

that would invalidate results (tamper proofing). 

i. Calibrated equipment should be identified in some manner to prevent the inadvertent use 

of non-calibrated equipment in the maintenance process. The identification usually includes the 

serial number or other identification, date of last calibration, date calibration is due, and the name

or initials of the person who performed the calibration. It is important that the equipment’s serial 

number can be identified if the label is removed or lost. All calibrated tools and equipment 

should be protected from damage and deterioration during handling, maintenance, and storage. 

Par 4-12 Page 53
AC 145-9 7/3/03 

j. The facility may use some equipment that does not require calibration if that equipment is 

not used to make airworthiness determinations. The procedures should describe how that 

equipment is identified and controlled. Other equipment may have limited calibration, and the 

limitations should be clearly marked on the equipment or label. 

k. The following questions or concerns are offered as a guide and are intended to help 

initiate the calibration procedures in the QCM. They should not be considered all-inclusive or 

applicable to all facilities. 

 Who (by title) is responsible for the calibration system? 

 What is the basis for the test intervals (manufacturer, standard industry practice, etc.)? 

 Is the calibration technique recommended by the manufacturer or standard industry 

practice? 

 How is calibrated equipment identified?

 Is the calibration technique documented?

 What procedure is used to change calibration intervals? 

 Are actual calibration results recorded to justify changes to calibration intervals?

 Is calibration of tools traceable to NIST or manufacturer’s standards, or an accepted 

foreign or international standard? 

 If foreign equipment is used, is the calibration standard acceptable to the FAA?

 Do the procedures ensure that equipment is removed from service and calibrated 

when due?

 Do the procedures include recall of the product inspected if the measuring equipment 

was out of tolerance when calibrated?

 How is equipment handled if it is not submitted for calibration when it is due (i.e., 

lost or overdue)?

 How is calibration recorded? Are actual results recorded at each test point? 

 If the repair station uses automated test equipment, is it included in the calibration 

system? 

 Does the procedure describe the information on the calibration label of the 

equipment? 

Page 54 Par 4-12 
7/3/03 AC 145-9 

 How is equipment that must be calibrated before each use identified and recorded? 

 How is equipment that does not require calibration identified? 

 What are the procedures for calibration of employee-owned tools? 

 Do the procedures address the acceptance of new precision test equipment into the 

inventory?

 Do the procedures address calibration performed by an outside contractor?

 Do the procedures address calibration requirements, standards, documentation, and 

traceability of tools that the repair station has leased? 

 Who (by title) is responsible for records of calibration received from outside 

contractors? 

 Do the procedures describe the review of the contracted calibration facility’s records 

for traceability, accuracy, and acceptability? 

 Is the person performing the calibration qualified? Do the training records or 

employment records reflect his or her qualifications?

 Does the equipment used to perform the calibration have the required accuracy?

 If the facility includes an engine or auxiliary power unit test cell, does the manual 

include procedures for correlation, calibration, and limitations, if any?

 For facilities that perform NDT, does the manual include procedures for certification 

of company-manufactured NDT standards (if any are used)?

4-13. TAKING CORRECTIVE ACTION ON DEFICIENCIES. 

a. Reference. Section 145.211(c). 

b. Section 145.211(c)(1)(ix) states that the QCM must include procedures used for taking 

corrective action on deficiencies. Corrective action is taken to remedy an undesirable situation. 

The correction of deficiencies is normally an integral part of a repair station’s improvement 

process, and could include revisions to procedures that were not working properly. 

(1) Corrective action would be applicable in two situations: before the article is 

approved for return to service and after the article has been approved for return to service. The 

RSM should describe the system by which reworks are identified and corrected before an article 

is approved for return to service. In these cases, a review of the housing, facilities, equipment, 

personnel qualifications, and procedures should ensure that the deficiency was not a systemic 

problem. If the review indicates that the procedure is deficient, the corrective action should 

Par 4-12 Page 55
AC 145-9 7/3/03 

include a thorough review and improvement of the procedure. If the review indicates that the 

personnel lacked training or qualifications, corrective action should remedy the deficiency. In 

either event, the procedures must address how reworks are documented. 

(2) After the article is approved for return to service, the repair station may avail itself of 

the self-disclosure program addressed by AC 00-58, Voluntary Disclosure Reporting Program, as 

amended. This AC describes the procedures for voluntary reporting of potential violations of the 

regulations. Once an article is approved for return to service, discrepancies are often evidence of 

a potential violation of the regulations, particularly section 43.13. Therefore, the repair station 

should carefully review the referenced AC for the appropriate method of notifying the FAA. 

Irrespective of the use of the self-disclosure program, the repair station should have a procedure 

for ensuring the quality of the work performed and for handling customer returns or complaints. 

c. The following scenarios are presented as examples of the intended use of a corrective 

action program: 

Scenario 1. During the final inspection process of an aircraft in the repair 

station for a major inspection, the chief inspector performs a review of the 

paperwork. During that review, the inspector discovers that one of the 

discrepancies found during the inspection has not been corrected. Further 

review of the paperwork reveals that no repairs were performed to correct 

this discrepancy. Discussions held with the mechanics working on the 

aircraft reveal that a part is on order to complete the repair. The chief

inspector asks why no one wrote on the paperwork that the part is on 

order. One of the mechanics replied that there are no instructions 

anywhere that direct them where to write that a part is on order. The 

procedure requires the mechanic to describe the actions taken to clear the 

discrepancy, and to sign in the appropriate block. The procedure does not 

address what action to take if a part is on order. What first appeared as a 

failure of the mechanic to write that a part is on order turned out to be a 

lack of written procedures in the manual. By taking the time to develop a 

written procedure for the mechanics to follow, the repair station corrected 

the deficiency. 

Scenario 2. The repair station overhauls “widgets,” which are 

components of a turbine engine. Part of the overhaul process involves 

application of a special coating to the bore of the widget, followed by 

machining to final diameter. The repair station contracts the application of 

this coating to another facility. During the machining operation, several 

areas of the coating are chipped completely off the bore. Since this 

condition is unacceptable, the bore must be stripped and re-coated. After 

experiencing this condition on several parts, the repair station conducts an 

investigation into the root cause. A review of the machining process 

indicated all recommended procedures were followed. The repair station, 

in coordination with the contracted facility, conducted a review of the 

process used to apply the coating. The investigation revealed a 

Page 56 Par 4-13 
7/3/03 AC 145-9 

malfunction of the spray equipment, allowing the coating to be applied 

incorrectly. The spray equipment was repaired and adjusted, eliminating 

the problem. What first appeared as a machining problem turned out to be 

an application problem. By taking the time to conduct a thorough 

investigation into the root cause, future problems were eliminated. 

d. Inadequate procedures, environment, working conditions, training, instructions, or 

resources may be factors for many deficiencies that are attributed to human error. The 

involvement of personnel from several levels within the organization (if appropriate) will 

contribute to the program and ensure quality. Corrective action requires that the root cause or 

causes of the discrepancy be investigated and determined in order to eliminate such causes. The 

investigation must be fact-based and typically begins with an analysis of the potential causes of 

the discrepancy. It is usually helpful to have a small team of informed and involved individuals 

associated with the article/process. Although human factors may play a part, focus should be 

placed on physical factors, such as workplace environment, facilities, equipment, and tooling;

process factors, such as clarity of instructions; and training/understanding of methodology for the 

work to be properly accomplished. Flow or process diagrams of the maintenance process for the 

affected article are a typical starting place. Typically, each item in the process, and interactions

between such items, are questioned/analyzed in an attempt to determine which either caused or 

contributed to the ultimate deficiencies. Often the interactions result in a cumulative effect that 

results in the deficiency. Once each potential weakness is identified, the individual/team

analyzes each to correct the findings. The product is checked to determine whether the 

corrective action has accomplished the elimination of the deficiency/discrepancy. 

e. A documented procedure for taking corrective action on deficiencies should answer the 

following: 

 What is the title of the person responsible for the program?

 How is the root cause of the problem determined? Will any interim steps need to be 

taken to prevent delivery of deficient products while the corrective action is 

implemented?

 Who (by title) will initiate corrective action?

 How much time will be allowed for the corrective action to be implemented? 

 Who (by title) will perform a follow-up audit of the corrective action to ensure that it 

was effective? 

 What records will be maintained of the cause and corrective action taken?

f. For those facilities that elect to conduct regularly scheduled management review meetings, 

the investigation, cause, and corrective actions taken to prevent recurrence of discrepancies 

should be a topic of discussion during those meetings. 

Par 4-13 Page 57 (and 58)

7/3/03 AC 145-9 

 Appendix 1 

APPENDIX 1. FORMS 

a. Reference. Section 145.211(c)(3). 

b. Section 145.211(c)(3) requires that the QCM contain a sample of the inspection and 

maintenance forms and the instructions for completing such forms. Or, the manual may refer to 

a separate forms manual, which provides examples of the forms with instructions. 

c. The forms included in this section should be samples of any form, tag, and label described 

in the procedures within the RSMs. The instructions for completing the form may be on the 

form or on a separate document. The number and content of the forms will depend on the size of 

the repair station and the complexity and the variety of the articles for which the repair station is

rated. Revisions or additions to the form section of the manual should follow the documented 

revision procedures. 

d. Some factors to consider when developing instructions for completing a form are: 

 How should the form be introduced (at what point during the maintenance process), 

and when should it be completed?

 Who is the person or department responsible for starting the form, who will 

contribute to its completion, and who will finish all required entries on the form? 

 How will the form be completed?

 What is the purpose of the form and how will it fit into the system? 

 How should revisions to the form be accepted/approved before release (if

applicable)?

 How will the form fit into the recordkeeping system? 

 Which detailed inspection forms and checklists should be used when performing 

annual, 100-hour, progressive or other approved inspection programs, or engine 

overhaul inspection sheets? These need not be included in the manual. These forms

should be referenced in the manual, and instructions for completing these forms (if 

required) may be in a separate document. 

 Do forms that are used for multiple operations or work have adequate space and 

appropriate instructions, including specific assignment of responsibility, to ensure 

that they can be filled out properly?

 Page 1
AC 145-9 7/3/03 

Appendix 1 

 Do the instructions direct the user to write N/A (not applicable) or N/R (not required), 

and initial/date any blocks on the form that are not used? 

 Will retention and storage be done in accordance with section 145.219(c)? 

e. No examples of forms are offered in this AC because forms must be developed to fit the 

needs of each repair station. 

Page 2 
7/3/03 AC 145-9 

 Appendix 2 

APPENDIX 2. CHECKLIST 

a. The following checklist is provided as a guide for reviewing the completed manual(s). 

This checklist was not developed to be all-inclusive and should be modified to fit the type of 

operation and complexity of the repair station. Some suggested items may not be applicable to 

all repair stations. 

b. Manual Revision and Control. 

 Who will initiate, write, and submit revisions to the FAA for review and acceptance? 

 How will the repair station incorporate changes to revisions found not acceptable to 

the FAA? How will the repair station correct any maintenance/administrative actions

performed under revisions that were found not acceptable to the FAA?

 How and where is the acceptance of the manual noted, including how the FAA will 

receive its revisions? 

 How will the revisions be distributed?

 Does the procedure ensure that each manual holder receives each revision? 

 Will the revised text of each affected page be clearly identified? 

 Do the procedures include control of sections of the manual, such as identification, 

revision status, page numbering, issue date, and approvals/acceptance?

 Do the procedures to control sections of the manual address (as applicable) 

identification, revision status, page numbering, issue date, and approvals of internal 

personnel responsible for the manual and revisions?

c. Organization. 

 Does the manual include an organization chart that shows, by title, each manager with 

authority to act on behalf of the repair station?

 Are the titles for the positions the same throughout the manual?

 Does the organizational chart show separation of maintenance and inspection 

departments (if applicable)?

d. Personnel. 

 Does the manual describe the duties and responsibilities, including the area of 

responsibility assigned, of each management position?

 Page 1
AC 145-9 7/3/03 

Appendix 2 

 Does the narrative describe what each person does?

 Do the procedures ensure that their duties and responsibilities are performed in each 

person’s absence?

 Does the manual include procedures for maintaining and revising the rosters required 

by section 145.161?

 Does the manual include procedures for maintaining the employment summaries for 

each person whose name is on the roster? 

 Does the manual include procedures for applying for additional repairmen and for 

maintaining the certificates? 

 Does the manual include a procedure for surrendering repairman certificates when 

required by part 65?

 Do the employment summaries meet the requirements of section 145.161? 

e. Operations, Housing, and Facilities. 

 Does the manual include a drawing showing the facility’s floor plan, shops, and 

equipment? 

 Is a description of the facility (narrative) included?

 Is the operation of the repair station described?

 Are any special environmental conditions addressed?

 Does the description include a generic overview of the equipment?

 If the repair station leases or rents equipment, does the manual contain procedures 

describing the lease/rent process and who is responsible for managing the program?

 How does the repair station ensure the equipment is in place and under its control 

when the work is performed?

 If the repair station is using special equipment or tools other than those recommended 

by the manufacturer, does the manual include procedures for determining 

equivalency?

 Does the manual include a description of the stock room, how inventory is 

requisitioned for particular jobs, and how shelf life inventory is maintained?

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7/3/03 AC 145-9 

 Appendix 2 

f. Capability List. 

 Who (by title) will maintain the capability list? 

 How will the self-evaluation be performed? 

 Who will perform the self-evaluation?

 How is the self-evaluation documented?

 Do the checklists and forms address all of the applicable requirements of part 145 

(e.g., housing, facilities, equipment, tools, technical data, and personnel)? 

 How will results of the self-evaluation be reported to management? 

 Does the procedure describe how items are added to and deleted from the list?

 Are changes to the list clearly indicated on the document? 

 If electronic media is used, are the hardware and software compatible with that of the 

CHDO?

g. Training Program Revision. 

 Who is responsible for submitting training program revisions to the FAA? 

 When will the revision be submitted? 

 How will the revision be approved (include the repair station approval as well as 

FAA)?

 How often will the training program be reviewed for currency and completeness? 

 Who will perform the review? 

 How will revisions be recorded and implemented? 

 How will the revised text be identified? 

h. Work Performed at Another Location. 

(1) For a one-time special circumstance: 

 Who will notify the CHDO, and how?

 How and where will the approval/denial be recorded? 

 Page 3
AC 145-9 7/3/03 

Appendix 2 

(2) If the repair station intends to perform work at another location on a regular basis, 

does the manual include procedures for: 

 The preparations and conditions to be met prior to performing any work?

 Who is responsible for supervising the maintenance performed at another 

location?

 Ensuring that the applicable sections of the RSM are available at the remote site? 

 Ensuring that adequate tools, equipment, and current technical data are available 

at the site? 

 When and how the article is inspected? 

 How the work is recorded? Do the records meet the requirements of sections 43.9 

and 43.11? Are the forms used at the remote location the same as those used 

within the repair station? Who is responsible for transporting and storing the 

records? Where will they be stored? 

i. Maintenance Performed for an Air Carrier. 

 Who is responsible (by title) for keeping a file of the air carrier’s procedures, 

including the necessary technical data? 

 Who is responsible (by title) for review and amendment of purchase orders for 

complete and correct instructions? Is that person trained?

 How does the repair station maintain a current list of RII inspectors? Who maintains 

the list? 

 Does the RSM include procedures to ensure that the necessary equipment, trained 

personnel, and technical data will be available for line maintenance?

 Does the manual describe the training program for air carrier maintenance and RII?

j. Contract Maintenance Information. 

 What is the title of the person responsible for the contract maintenance program?

 What is the title of the person maintaining the list of contracted facilities and contract 

maintenance functions?

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7/3/03 AC 145-9 

 Appendix 2 

 What is the title of the person responsible for forwarding revisions of the list to the 

CHDO?

 When and how will the CHDO be notified of revisions to the list? 

 How will the repair station determine if the contracted facility is properly rated?

 Do the contract provisions for non-FAA-certificated facilities include provisions for 

FAA inspection?

 How does the repair station qualify and audit a non-FAA-certificated source? 

 Are the auditors who inspect contract maintenance sources trained?

 How do the receiving inspectors inspect articles returned after maintenance from

certificated and non-certificated sources? Are they trained?

 Are discrepancies with contracted sources included in the corrective action program? 

k. Proficiency of Inspection Personnel. 

 How are minimum qualifications for inspection personnel established? Who makes 

this determination?

 How will the inspector maintain proficiency? Training? On-the-job training? What 

methods are used?

 Do the records of training indicate the method, length, instructor, and dates? Are they 

current? 

 Who is responsible for ensuring that inspectors maintain proficiency?

 Does the final inspector authorize approval for return to service? If so, is this 

inspector certificated (if within the United States)?

 Will the inspectors require any special training, (i.e., NDT)? Who will be responsible 

for the training? How will inspectors continue to meet any required industry 

standards?

l. Current Technical Data. 

 What is the title of the person responsible for revising and maintaining the technical 

data?

 How does the repair station ensure that the technical data is current? 

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AC 145-9 7/3/03 

Appendix 2 

 How is the technical data distributed throughout the company?

 How does the repair station ensure that current technical data is available to the staff?

 What is the title of the person responsible for control and distribution of the technical 

documents? 

 If the technical data require translation, who is responsible for performing the 

translation and quality checks? How will the data be revised and distributed?

 If computer software is used for component testing, how are revisions made and 

distributed? Who is responsible for ensuring that the software is operating properly 

and that the current revision is in use?

m. Inspection System.

(1) General. 

 Does the manual include procedures for reporting malfunctions or defects? 

 Does the manual contain procedures that ensure continuity of inspection 

responsibility?

 Does the manual contain procedures for segregation of repairable from nonrepairable articles?

 Does the manual include a procedure for tagging or identifying articles, including 

repairable and non-repairable articles?

(2) Receiving Policy. 

 Who (by title) performs the inspection, and how is it performed? 

 How is the inspection recorded? 

 What actions are required if the container and/or material was damaged?

 How is the material routed for proper storage? 

 What is the required documentation from contracted facilities? 

(3) Incoming Inspection. 

 Who (by title) will perform this inspection?

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7/3/03 AC 145-9 

 Appendix 2 

 How will the inspection be performed? What technical data will be necessary to 

perform this inspection?

 Does the manual include procedures for control of items that have shelf life 

limitations?

 Do the procedures describe the action taken if the material meets specification, as 

well as what action is taken if the material does not meet specification?

 How is the material identified if acceptable or not acceptable? 

 Do the materials require any special testing requirements? If so, what procedures 

are followed to perform those tests? How is the testing performed?

 What is the disposition of incoming inspection records?

 How is traceability of materials received in lots, such as weld wire and coating 

powders, ensured?

 Does the manual contain procedures for detecting and reporting suspected 

unapproved parts?

(4) Preliminary Inspection. 

 Who (by title) will perform this inspection, and how will it be performed? 

 When is this inspection performed?

 How will the inspection be recorded? 

 If the inspection reveals discrepancies, how are they recorded? 

 How is corrective action taken to correct any discrepancies? 

 Do the records show the relationship between the discrepancies found and the 

corrective action taken?

 Is the record of this inspection made part of the work order file (work package)?

 How is traceability of life limits and/or time since overhaul ensured?

 How are the parts identified if acceptable and if not acceptable? 

 Does the manual include procedures to ensure that the records (work package) are 

kept with the parts? 

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AC 145-9 7/3/03 

Appendix 2 

Page 8 

 Does the manual include a procedure to ensure that current technical data is 

available before inspection? 

 Does the manual include procedures for detecting and reporting unapproved 

parts? 

 Does the manual include a procedure for reporting failures, malfunctions, or 

defects of an article? 

(5) Hidden Damage Inspection. 

 Who (by title) will perform the inspection? 

 How will the inspection be recorded? 

 If defects are noted, where will they be recorded? 

 Does the inspection include areas adjacent to obvious damage? 

 Who will communicate with the customer? 

 Is the record of this inspection made part of the work order file? 

(6) In-Process Inspection. 

 Who (by title) will perform the inspection, and how is it performed? 

 How will the inspection be recorded? 

 If defects or discrepancies are noted, where will they be recorded? 

 Do the procedures allow steps to be performed out of sequence? If so, how is this 

authorized and recorded? 

 If the in-process inspection results are not satisfactory, does the manual have 

procedures governing rework? 

 Do the forms used in the inspection system record both the name of the person 

who performed the work and the inspector? 

 Are the records of this inspection made part of the work order (records package)? 

 Who determines when an in-process inspection is performed, and how is that 

determined? 
7/3/03 AC 145-9 

 Appendix 2 

 Page 9

 Do the procedures describe the inspection of an article and review of 

documentation for maintenance performed by a contracted facility? 

(7) Final Inspection. 

 Who (by title) will perform the inspection? 

 How will the inspection be recorded? 

 If the final inspection is not satisfactory, does the manual have procedures 

governing rework? 

 Before the final airworthiness determination is made, are all other maintenance, 

inspection forms, and records checked for completion? How is this indicated? 

 How is the inspection performed? 

 After the final inspection is completed, how are the articles identified? 

 Does the manual include procedures for when the final inspection results in 

accepting or rejecting the article? 

 If the repair station performs 100-hour and/or annual inspections, does the manual 

include procedures addressing the use of inspection cards and/or forms, 

checklists, etc., to record the inspection and correction of any discrepancies? 

Does the manual also include procedures for deferral of inoperative equipment if 

the operator has an FAA-approved minimum equipment list? 

 If the maintenance performed was a major repair or major alteration, does the 

manual include procedures to ensure that the inspector who inspects the article 

and approves it for return to service is trained, qualified, and authorized? 

(8) Work Sign-Off. 

 Who (by title) issues the stamps, badges, or authorizations? 

 Do the procedures ensure that the method used can be traced to the individual 

who was issued the authorization (a list of names and stamps or similar 

document)? 

 Does the manual include procedures to check that the stamps (if used) are still 

legible? 
AC 145-9 7/3/03 

Appendix 2 

Page 10 

 Do the procedures ensure that the stamp, badge, or authorization is returned to or 

revoked by the responsible manager after termination or reassignment of an 

employee? 

 Does the training include security procedures for the system used (stamps or 

electronic)? 

(9) Approval for Return to Service. 

 Does the form meet the requirements of sections 43.9 and 43.11?

 Who (by title) is authorized to complete the form? How is he/she authorized? 

 Do the procedures ensure that a qualified and authorized person can assume the 

responsibilities of this task if the person who normally performs it is not available 

(e.g., sick, on vacation, etc.)? 

 Does the maintenance release document include or reference a list of approved 

parts? 

 Do the procedures ensure that only those articles for which the repair station is 

rated are approved for return to service? 

 Do the procedures describe how the repair station will determine if the repair or 

alteration is major? If the maintenance was a major repair or major alteration, do 

the procedures describe how it will be recorded? 

 Who (by title) is authorized to complete FAA Form 337, and how is that person 

authorized? 

 What records are given to the customer, and what records are maintained on file 

at the repair station? 

n. Required Records and Recordkeeping.

 Who (by title) is responsible for maintaining the recordkeeping system? 

 What documents are included in a typical records package? What additional forms 

may be included? 

 Where are the records stored? 

 Who (by title) reviews records for accuracy and completeness before approval for 

return to service? Is the individual trained? 
7/3/03 AC 145-9 

 Appendix 2 

 Page 11

 If the repair station uses electronic records, does the manual describe the procedures, 

including security, back-up, and retrieval? 

 Are the records in English, and do they meet (at a minimum) the requirements of 

section 43.9? 

 What records will be provided to the owner/operator? 

 How will the repair station process records received from contractors? 

 Are procedures for distribution and storage of FAA Form 337 included? 

 How are records of any special inspections, such as hydrostatic tests, functional tests, 

and so forth, processed? 

o. Calibration of Measuring and Test Equipment. 

 Who (by title) is responsible for the calibration system? 

 What is the basis for the test intervals, such as manufacturer, standard industry 

practice, and so forth? 

 Is the calibration technique recommended by the manufacturer or standard industry 

practice? 

 How is calibrated equipment identified? 

 Is the calibration technique documented? 

 What procedure is used to change calibration intervals? 

 Are actual calibration results recorded to justify changes to calibration intervals? 

 Do the procedures ensure that calibration is traceable to NIST, the manufacturer, or 

an acceptable foreign or international standard? 

 Do the procedures ensure that equipment is removed from service and calibrated 

when due? 

 Do the procedures include recall of any product inspected if the measuring equipment 

was out of tolerance when the work was performed? 

 How is equipment that is not submitted for calibration when it is due handled, i.e., 

lost or overdue? 

 How is calibration recorded? Are the actual results at each test point recorded? 
AC 145-9 7/3/03 

Appendix 2 

Page 12 

 If automated test equipment is used, is it included in the calibration system? 

 Does the procedure describe the information on the calibration label of the 

equipment? 

 How is equipment that must be calibrated before each use identified and recorded? 

 How is equipment that does not require calibration identified? 

 Do the procedures address the acceptance of new precision test equipment into the 

inventory? 

 Do the procedures address calibration performed by an outside contractor? 

 Do the procedures address calibration of employee-owned tools? 

 Who (by title) is responsible for records of calibration received from outside 

contractors? 

 Do the procedures address calibration requirements, standards, documentation, and 

traceability of tools that the repair station has leased? 

 Do the procedures describe the review of the contracted calibration facility’s records 

for traceability, accuracy, and acceptability? 

 If the facility includes an engine or auxiliary power unit test cell, does the manual 

include procedures for correlation, calibration, and limitations, if any? 

 If Nondestructive Testing (NDT) is performed, does the manual include procedures 

for certification of company-manufactured NDT inspection standards (if any are 

used)? 

p. Taking Corrective Action on Deficiencies. 

 Who (by title) is responsible for the program? 

 How is the root cause of the problem determined? 

 Who (by title) will initiate corrective action? 

 How much time will be allowed to implement the corrective action? 
7/3/03 AC 145-9 

 Appendix 2 

 Page 13 (and 14) 

 Who (by title) will perform a follow-up audit of the corrective action to ensure that it 

was effective? 

 What records will be maintained of the cause and corrective action taken?