Fokker Services B.V. 

For Continued Competitive Operation 

 Prepared Function / Note Date 

 moen-hm02430 24-9-2014 

 

 

 Checked 

 gelder-rg02568 Maintenance Advisor 16-1-2015 

 

 

 Approved 

 koning-gk01651 Design Engineer 16-1-2015 

 visser-hv01800 Airworthiness Office 19-1-2015 

 

 

 

 Released 

dignum-pd03516 Maintenance Recommendations 19-1-2015

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Company / dept. : TOMR Report no. : SE-473_ 

Order no. : A12TA3 Issue : 11 

Original release date : 15-9-1995 Release date : 19-1-2015 

Security class : RESTRICTED Status : Released 

 ATA : 

 ECR : 

Engineering Report 

Airworthiness Limitations Section (ALS)

Fokker 70/100 Certification Maintenance Requirements 
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SUMMARY 

This document contains the system Certification Maintenance Requirements for the Fokker F28 Mk0070 and 

the F28 Mk0100 aircraft. The selection of the CMR tasks from the System Safety Analysis tasks 

(CS/JAR/FAR 25.1309) is based on FAA AC 25-19 and JAA AMJ 25-19. 

This report is inserted into the Airworthiness Limitations Section (ALS) of the Instructions for Continued 

Airworthiness (ICA). 

Please take notice of the following: 

As from MRB report revision 14, the Airworthiness Limitations Section (ALS) is removed from the MRB report 

and published separately in order to harmonize the MRB with other manufacturer platforms and to clearly 

distinguish tasks selected from the MSG-3 process (MRB) from tasks required to meet certification 

requirements (ALS). 

As soon as the ALS is revised an e-mail notification will be sent to the Operators. To receive such a 

notification, “Notification of updates in the Documentation download Center (pdf files)” needs to be selected 

in the personal mailing list on the myfokkerfleet.com website. Furthermore the Airworthiness 

Recommendation Catalogue (ARC) will be updated. As soon as the (new / revised) ALS Airworthiness 

Directive is available; the ARC will be updated again.
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REASON FOR REVISION 

Issue Description 

11 • Fokker logo in header 

• Lay-out of the title/summary page (page 1) changed to the latest Fokker standard (no 

revision bar given). 

• Compliance Information added 

• As a result of CRR-0231, two new “One Star” CMR’s have been defined in table 3.1: 

o 783100-CM-01, 

o 783500-CM-01. 

Issue Description 

10 • 242000-CM-02 combined with 242000-CM-01 at an interval of 125 FH, effectivity = ALL, 

243000-CM-04 combined with 243000-CM-03 at an interval of 125 FH, effectivity = ALL 

• 273500-CM-08 interval changed from 3000 FH to 3600 FH 

Issue Description 

9 • General report lay-out changed in accordance with house style Fokker Technologies. 

• Abbreviations added 

• Summary paragraph: reference to Appendix 1 of the MRB report changed into a reference 

to the Airworthiness Limitations Section (ALS). 

• As a result of AFTS installation (SBF100-28-055, ECR 015347) new *CMRs introduced: 

281400-CM-01, 281400-CM-02, 281400-CM-03, 281400-CM-04. 

• Paragraph 3.1 and 3.2: 

For accomplishment instructions, reference is made to an MPD tasknumber (instead of an 

MRB or AMM tasknumber). 
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TABLE OF CONTENTS 

SUMMARY 1 

REASON FOR REVISION 2 

TABLE OF CONTENTS 3 

COMPLIANCE INFORMATION 4 

SECTION 0 5 

1. SCOPE 5 

2. APPLICABILITY 5 

SECTION 1 : SYSTEM CMR's 6 

1. CRITERIA FOR IDENTIFICATION 6 

2. HANDLING OF SYSTEM CMR's 6 

2.1. CMR "One Star" task 6 

2.2. CMR "Two Star" task 6 

3. CMR TASKS AND INTERVALS 7 

3.1. "ONE STAR" CMR's (TASK AND INTERVAL). 7 

3.2. "TWO STAR" CMR's (TASK AND INTERVAL). 8 

SECTION 2: ABBREVIATIONS 9 
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COMPLIANCE INFORMATION 

 *CMR 783100-CM-01 

 First CMR inspection has to be accomplished: 

within one year or 3000 FH (whichever comes first) from the issue date of this report SE-473, 

issue 11 (but not later than 12000 FH since last accomplishment of MRB task 783100-00-04). 

*CMR 783500-CM-01 

 First CMR inspection has to be accomplished: 

within one year or 3000 FH (whichever comes first) from the issue date of this report SE-473, 

issue 11 (but not later than 10000 FH since last accomplishment of MRB task 783500-02-01) 

OR 

within 8889 FH since last MRB inspection if this comes later. 
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SECTION 0 

1. SCOPE

This document contains the system Certification Maintenance Requirements (CMR's), 

 for the Fokker F28 Mk0070 and the F28 Mk0100. 

IMPORTANT: The requirements given in this document are mandatory, except in sofar that interval 

escalations, can be justified in accordance with the procedure stated herein. 

Non-compliance suspends the validity of the Airworthiness Certificate. 

The identification of CMR tasks in no way diminishes the importance of non-CMR tasks and changes to 

these are subject to normal practices and procedures between the operator and the National Regulatory 

Authority. 

This document does not take into account Airworthiness Directives (BLA/ADs) which, if issued against a 

system CMR, supersede the specific requirement given in this document. 

2. APPLICABILITY

This document is applicable for the Fokker F28 Mk0070 and the F28 Mk0100 model aircraft, the 

effectivity of each individual CMR task is identified. 
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SECTION 1: SYSTEM CMR's 

1. CRITERIA FOR IDENTIFICATION

System Certification Maintenance Requirements (CMR's) are tasks arising from the Type Certification 

process which are associated with the most significant failure conditions. 

These have been shown to be necessary either by System Safety Assessment 

(e.g.: CS/JAR/FAR 25.1309 compliance) or, in a minority of cases, by engineering judgment. 

These requirements are allocated to one of two categories (identified as One Star or Two Star) 

according to AC/AMJ 25-19. 

Tasks associated with the following criteria are 'not identified' as CMR's: 

(1) Tasks related to failure conditions with minor and major effects. These tasks are considered as 

important as all other tasks to keep the aircraft in good condition and do not need special 

emphasis. 

(2) Maintenance actions (for simple and for conventional systems) considered to be routine 

maintenance activity (MRB tasks) based on engineering judgment and experience on similar 

airplane types. 

(3) Tasks, as part of the crew check list, included in the approved Airplane Flight Manual. 

 

2. HANDLING OF SYSTEM CMR's

2.1. CMR "One Star" task 

The tasks and intervals specified are mandatory and cannot be changed, escalated, or deleted without 

the concurrence of the responsible Certificating Authority. 

2.2. CMR "Two Star" task

Task intervals may be adjusted in accordance with an operator's approved escalation practices or an 

approved reliability program, but the task may not be changed or deleted without prior approval by the 

responsible Certification Authority. 
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3. CMR TASKS AND INTERVALS

 

3.1. "ONE STAR" CMR's (TASK AND INTERVAL).

CMR - 

TASKNUMBER 

CMR - 

 TASK - DESCRIPTION 

EFFECTIVITY INTERVAL Ref. MPD - 

TASKNUMBER 

242000-CM-01 Check that bus is energized when all 

AC power sources are OFF. 

ALL 125 FH 242000-00-01 

242000-02-01 

243000-CM-03 Check that both batteries discharge 

when all AC power sources are OFF.

ALL 125 FH 243000-00-03 

274300-CM-01 Operational Check of stabilizer shutoff valve circuit. Pre ECR 95553 

MK0100 only 

 515 FH 274300-00-02 

274301-CM-02 Test of stabilizer sticking switch and 

flight control OFF switches. 

Pre ECR 95553 

MK0100 only 

4500 FH 274300-00-01 

274302-CM-03 Test of stabilizer sticking switch and 

flight control OFF switches 

 Post ECR 95553 4500 FH 274300-01-05 

276400-CM-04 Operational Check of thrust lever low 

and manual select switches. 

ALL 12000 FH 276400-00-06 

281400-CM-01 Functional Check to make sure 

AFTS SOV is functioning properly. 

Post ECR 015347

 (SBF100-28-055) 

30 FH 281400-01-04 

281400-CM-02 Functional Check of AFTS 

Vent/Overflow Valve Isolation 

Relays. 

Post ECR 015347

 (SBF100-28-055)

600 FH 281400-01-05 

281400-CM-03 Functional Check of Wing Tank 

Overpressure Protection System of 

AFTS. 

Post ECR 015347

 (SBF100-28-055)

600 FH 281400-01-06 

281400-CM-04 Functional check of AFTS Tank 

Overpressure Relief Valves, Bleed 

Air Tank Pressurization System and 

Fuel/No-Air Valves. 

Post ECR 015347

 (SBF100-28-055)

600 FH 281400-01-07 

321100-CM-01 Check oil level of MLG torque link 

damper. 

Pre ECR 96304 

Pre ECR 15298 

DAILY 321100-00-09 

525100-CM-01 Operational check of the pressure 

relief latch. 

Post ECR 97223 3000 FH 525100-00-03 

783100-CM-01 Detailed Inspection of the secondary 

lock mechanism. 

ALL 7000 FH 783100-00-04 

783500-CM-01 Operational check of the thrust 

reverser indication and warning 

system. 

Post ECR 96904 8889 FH 783500-02-01 
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3.2. "TWO STAR" CMR's (TASK AND INTERVAL).

 

CMR - 

TASKNUMBER 

CMR - 

 TASK - DESCRIPTION 

EFFECTIVITY INTERVAL Ref. MPD - 

TASKNUMBER 

221100-CM-01 Operational check of AP disconnect 

with the trim switches. 

Post ECR 97195 5000 FH 221100-02-01 

271300-CM-05 Operational check of flight control 

shut-off valve circuit (aileron, 

rudder,elevator) 

ALL 500 FH 271300-00-02 

271300-CM-06 Test of sticking switch and flight 

control OFF switches (aileron, 

rudder,elevator) 

ALL 4500 FH 271300-00-01 

272300-00-01 

273300-00-01 

273500-CM-07 Operational check of stickpusher 

system 

Pre ECR 95386 

MK0100 only 

1000 FH 273500-00-01 

273500-CM-08 Operational check of isolating valve 

and system full stroke test 

Post ECR 95386 3600 FH 273500-03-01 

275200-CM-09 Check that solenoid shut-off valve 

depressurizes flap motor when 

energized 

ALL 12000 FH 275200-00-02 

301100-CM-01 Check wing supply duct high 

pressure switches and valves 

ALL 12000 FH 301100-00-08 

323300-CM-02 Functional check of landing gear 

alternate control system 

ALL 4000 FH 323300-00-02 

527100-CM-01 Check door warning fault indication 

system on MTP/CFDU. 

ALL 500 FH 527100-00-02 

773100-CM-01 Check EFSU channel indication on 

MTP/CFDU 

ALL 1000 FH 773100-00-01 

774600-CM-02 Functional check of Engine Vibration 

Monitor (EVM) system 

ALL 4000 FH 774600-00-01 

774800-CM-01 Check the LH and RH MFDU’s for 

Fan inspection Status Message 

Post ECR 97160 3 Days 774800-00-01 
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SECTION 2: ABBREVIATIONS 

AC Alternating Current 

AC Advisory Circular 

AD Airworthiness Directive 

AFTS Auxiliary Fuel Tank System 

ALI Airworthiness Limitations Item 

ALS Airworthiness Limitations Section 

AMJ Advisory Material Joint 

AMM Aircraft Maintenance Manual 

AP Auto Pilot 

BLA Bijzondere Luchtwaardigheids Aanduiding 

CFDU Centralized Fault Display Unit 

CMR Certification Maintenance Requirement 

ECR Engineering Change Request 

EVM Engine Vibration Monitor 

FAR Federal Aviation Regulation 

FH Flight Hour 

ICA Instructions for Continued Airworthiness 

JAR Joint Airworthiness Regulation 

LH Left Hand 

MFDU Multi Functional Display Unit 

Mk Mark 

MLG Main Landing Gear 

MPD Maintenance Planning Document 

MTP Maintenance Test Panel 

MRB Maintenance Review Board 

RH Right Hand 

SB Service Bulletin 

SOV Shut Off Valve 

SSA System Safety Assessment (or Analysis)