Federal Register / Vol. 80, No. 127 / Thursday, July 2, 2015 / Proposed Rules 38033 

Telephone: (202) 586–8145. Email: 

michael.kido@hq.doe.gov. 

For information on how to submit or 

review public comments and the docket, 

contact Ms. Brenda Edwards at (202) 

586–2945 or by email: 

Brenda.Edwards@ee.doe.gov. 

SUPPLEMENTARY INFORMATION: DOE 

published an RFI in the Federal 

Register to solicit information to help 

DOE determine the feasibility of 

developing energy conservation 

standards and an appropriate test 

procedure for this equipment. The RFI 

also solicited the public for information 

to help inform DOE’s efforts in 

evaluating the prospect of regulating 

this equipment. The comment deadline 

had been set for June 22, 2015. 

The Association of Pool & Spa 

Professionals requested a 90-day 

extension of the comment period to 

sufficiently prepare and submit 

comments. After careful consideration 

of the request, DOE has determined that 

reopening the comment period to allow 

additional time for interested parties to 

submit comments is appropriate based 

on the foregoing reason. Specifically, 

DOE believes that reopening the 

comment period by 45 days will provide 

the public with sufficient time to submit 

comments responding to DOE’s RFI. 

Accordingly, DOE is reopening the 

comment period and will deem any 

comments received (or postmarked) to 

be timely submitted. 

Issued in Washington, DC, on June 25, 

2015. 

Kathleen B. Hogan, 

Deputy Assistant Secretary for Energy 

Efficiency, Energy Efficiency and Renewable 

Energy. 

[FR Doc. 2015–16344 Filed 7–1–15; 8:45 am] 

BILLING CODE 6450–01–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2015–1990; Directorate 

Identifier 2015–NM–027–AD] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for certain 

The Boeing Company Model 737–400 

series airplanes, as modified by a certain 

supplemental type certificate. This 

proposed AD was prompted by the 

discovery of a design drawing error 

regarding placards that identified 

incorrect squibs and pressure switches 

for certain fire extinguisher bottles. This 

proposed AD would require a detailed 

inspection of certain cargo placards to 

determine if they are the correct 

placards and in the correct location, a 

detailed inspection of the harnesses to 

verify that they are marked and installed 

correctly, and corrective action if 

necessary. We are proposing this AD to 

detect and correct incorrectly installed 

harnesses for the cargo fire suppression 

system bottles, which could result in an 

incorrect activation sequence of the 

bottles, the inability to suppress a cargo 

fire quickly, and a possible 

uncontrollable fire. 

DATES: We must receive comments on 

this proposed AD by August 17, 2015. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: 202–493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE., 

Washington, DC 20590. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this proposed AD, contact Advanced 

Aircraft Extinguishers, 1052 SW 

Luttrell, Blue Springs, MO 64015; 

telephone: 816–228–3322; Internet 

www.aae-ltd.com. You may view this 

referenced service information at the 

FAA, Transport Airplane Directorate, 

1601 Lind Avenue SW., Renton, WA. 

For information on the availability of 

this material at the FAA, call 425–227– 

1221. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http://

www.regulations.gov by searching for 

and locating Docket No. FAA–2015– 

1990; or in person at the Docket 

Management Facility between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The AD docket 

contains this proposed AD, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket Office 

(phone: 800–647–5527) is in the 

ADDRESSES section. Comments will be 

available in the AD docket shortly after 

receipt. 

FOR FURTHER INFORMATION CONTACT: Paul 

DeVore, Aerospace Engineer, Systems 

and Propulsion Branch, ACE–116W, 

FAA, Wichita ACO, 1801 Airport Road, 

Room 100, Mid-Continent Airport, 

Wichita, KS 67209; phone: 316–946– 

4142; fax: 316–946–4107; email: 

paul.devore@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposal. Send your comments to 

an address listed under the ADDRESSES

section. Include ‘‘Docket No. FAA– 

2015–1990; Directorate Identifier 2015– 

NM–027–AD’’ at the beginning of your 

comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this proposed AD. We will 

consider all comments received by the 

closing date and may amend this 

proposed AD because of those 

comments. 

We will post all comments we 

receive, without change, to http://

www.regulations.gov, including any 

personal information you provide. We 

will also post a report summarizing each 

substantive verbal contact we receive 

about this proposed AD. 

Discussion 

We have received a report of a design 

drawing error regarding the placement 

of placards that identify the squibs and 

pressure switches for halon fire 

extinguisher bottles Number 1 and 

Number 2. Electrical harnesses for the 

cargo fire suppression system bottles 

may consequently be reversed, which 

would cause an incorrect activation 

sequence of the bottles, i.e., the initial 

high-rate ‘‘knockdown’’ agent discharge 

will not be released until after a 5- 

minute time delay rather than 

immediately as intended. This 

condition, if not corrected, could result 

in an incorrect activation sequence of 

the bottles, the inability to suppress a 

cargo fire quickly, and a possible 

uncontrollable fire. 

Related Service Information Under 1 

CFR Part 51 

We reviewed Advanced Aircraft 

Extinguishers Service Bulletin TFA10– 

26–0020, Revision IR, dated January 12, 

2015. The service information describes 

procedures for a detailed inspection of 

Advanced Aircraft Extinguishers (AAE) 

cargo fire protection system (FPS) 

placards to determine if they are the 

correct placards and in the correct 

location, and a detailed inspection of 


asabaliauskas on DSK5VPTVN1PROD with PROPOSALS
38034 Federal Register / Vol. 80, No. 127 / Thursday, July 2, 2015 / Proposed Rules 

the harnesses to verify that they are 

marked and installed correctly. The 

service information also describes 

corrective actions such as removing the 

existing AAE cargo FPS placards, 

destroying/discarding them, and 

installing AAE-provided cargo FPS 

placards on the mounting plate. This 

service information is reasonably 

available because the interested parties 

have access to it through their normal 

course of business or by the means 

identified in the ADDRESSES section of 

this NPRM. 

Clarification of Service Information 

Procedures 

Step C.(3) of the ‘‘SERVICE 

BULLETIN INSTRUCTIONS’’ of 

Advanced Aircraft Extinguishers 

Service Bulletin TFA10–26–0020, 

Revision IR, dated January 12, 2015, 

does not clearly state the corrective 

action for the inspection of the 

harnesses. Therefore, paragraph (h) of 

this proposed AD specifies the steps in 

the service information that would be 

required if any harness is not marked 

correctly or not installed correctly. 

FAA’s Determination 

We are proposing this AD because we 

evaluated all the relevant information 

and determined the unsafe condition 

described previously is likely to exist or 

develop in other products of the same 

type design. 

Proposed AD Requirements 

This proposed AD would require 

accomplishing the actions specified in 

the service information described 

previously, except as discussed under 

‘‘Differences Between this Proposed AD 

and the Service Information.’’ 

Differences Between This Proposed AD 

and the Service Information 

While Advanced Aircraft 

Extinguishers Service Bulletin TFA10– 

26–0020, Revision IR, dated January 12, 

2015, specifies a compliance time of 30 

days, this proposed AD would require a 

compliance time of 6 months. In 

developing an appropriate compliance 

time for this AD, we considered the 

degree of urgency associated with the 

subject unsafe condition, the average 

utilization of the affected fleet, and the 

time necessary to perform the 

inspection. In light of all of these 

factors, we find that 6 months 

represents an appropriate interval of 

time for affected airplanes to continue to 

operate without compromising safety. 

This difference has been coordinated 

with Boeing and AAE. 

The ‘‘EFFECTIVITY’’ section of 

Advanced Aircraft Extinguishers 

Service Bulletin TFA10–26–0020, 

Revision IR, dated January 12, 2015, 

lists serial number (S/N) 24132 in the 

‘‘Purchased for Installation on Aircraft 

Serial Number’’ column. This is a 

typographical error in the service 

information. The Applicability section 

of this proposed AD correctly identifies 

S/N 24231. 

Explanation of ‘‘RC’’ Steps in Service 

Information 

The FAA worked in conjunction with 

industry, under the Airworthiness 

Directive Implementation Aviation 

Rulemaking Committee (ARC), to 

enhance the AD system. One 

enhancement was a new process for 

annotating which steps in the service 

information are required for compliance 

with an AD. Differentiating these steps 

from other tasks in the service 

information is expected to improve an 

owner’s/operator’s understanding of 

crucial AD requirements and help 

provide consistent judgment in AD 

compliance. The steps identified as RC 

(required for compliance) in any service 

information identified previously have a 

direct effect on detecting, preventing, 

resolving, or eliminating an identified 

unsafe condition. 

For service information that contains 

steps that are labeled as Required for 

Compliance (RC), the following 

provisions apply: (1) The steps labeled 

as RC, including substeps under an RC 

step and any figures identified in an RC 

step, must be done to comply with the 

AD, and an AMOC is required for any 

deviations to RC steps, including 

substeps and identified figures; and (2) 

steps not labeled as RC may be deviated 

from using accepted methods in 

accordance with the operator’s 

maintenance or inspection program 

without obtaining approval of an 

AMOC, provided the RC steps, 

including substeps and identified 

figures, can still be done as specified, 

and the airplane can be put back in an 

airworthy condition. 

Costs of Compliance 

We estimate that this proposed AD 

affects 3 airplanes of U.S. registry. 

We estimate the following costs to 

comply with this proposed AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on 

U.S. operators 

Detailed inspection ...................................... 2 work-hours × $85 per hour = $170 ........................... N/A .............. $170 $510 

We estimate the following costs to do 

any necessary corrective actions that 

would be required based on the results 

of the proposed inspection. We have no 

way of determining the number of 

aircraft that might need these corrective 

actions: 

ON-CONDITION COSTS

Action Labor cost Parts 

cost 

Cost per 

product 

Corrective actions ...................................................... 2 work-hours × $85 per hour = $170 .............................................. $900 $1,070 

According to the manufacturer, some 

of the costs of this proposed AD may be 

covered under warranty, thereby 

reducing the cost impact on affected 

individuals. We do not control warranty 

coverage for affected individuals. As a 

result, we have included all costs in our 

cost estimate. 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 


asabaliauskas on DSK5VPTVN1PROD with PROPOSALS
Federal Register / Vol. 80, No. 127 / Thursday, July 2, 2015 / Proposed Rules 38035 

section 106, describes the authority of 

the FAA Administrator. Subtitle VII: 

Aviation Programs, describes in more 

detail the scope of the Agency’s 

authority. 

We are issuing this rulemaking under 

the authority described in Subtitle VII, 

Part A, Subpart III, Section 44701: 

‘‘General requirements.’’ Under that 

section, Congress charges the FAA with 

promoting safe flight of civil aircraft in 

air commerce by prescribing regulations 

for practices, methods, and procedures 

the Administrator finds necessary for 

safety in air commerce. This regulation 

is within the scope of that authority 

because it addresses an unsafe condition 

that is likely to exist or develop on 

products identified in this rulemaking 

action. 

Regulatory Findings 

We determined that this proposed AD 

would not have federalism implications 

under Executive Order 13132. This 

proposed AD would not have a 

substantial direct effect on the States, on 

the relationship between the national 

Government and the States, or on the 

distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify this proposed regulation: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Is not a ‘‘significant rule’’ under 

the DOT Regulatory Policies and 

Procedures (44 FR 11034, February 26, 

1979), 

(3) Will not affect intrastate aviation 

in Alaska, and 

(4) Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 14 CFR part 

39 as follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

■ 1. The authority citation for part 39 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701. 

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by adding 

the following new airworthiness 

directive (AD): 

The Boeing Company: Docket No. FAA– 

2015–1990; Directorate Identifier 2015– 

NM–027–AD. 

(a) Comments Due Date 

We must receive comments by August 17, 

2015. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to The Boeing Company 

Model 737–400 series airplanes, certificated 

in any category, having serial numbers 

23865, 24231, 24706, 24474, 25417, 27003, 

27149, 25375, 26281, 28661, and 28881, as 

modified by Supplemental Type Certificate 

ST01114WI (http://rgl.faa.gov/Regulatory_

and_Guidance_Library/rgstc.nsf/0/

f9490633c04cbc8286257301006ed621/$FILE/

ST01114WI.pdf). 

(d) Subject 

Air Transport Association (ATA) of 

America Code 26, Fire Protection. 

(e) Unsafe Condition 

This AD was prompted by the discovery of 

a design drawing error regarding placards 

that identified incorrect squibs and pressure 

switches for certain fire extinguisher bottles. 

We are issuing this AD to detect and correct 

incorrectly installed harnesses for the cargo 

fire suppression system bottles, which could 

result in an incorrect activation sequence of 

the bottles, the inability to suppress a cargo 

fire quickly, and a possible uncontrollable 

fire. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Placard Inspection 

Within 6 months after effective date of this 

AD, do a detailed inspection of Advanced 

Aircraft Extinguishers cargo fire protection 

system (FPS) placards to determine if they 

are the correct placards and in the correct 

location, and do all applicable corrective 

actions, in accordance with the ‘‘SERVICE 

BULLETIN INSTRUCTIONS’’ of Advanced 

Aircraft Extinguishers Service Bulletin 

TFA10–26–0020, Revision IR, dated January 

12, 2015. Do all applicable corrective actions 

before further flight. 

(h) Harness Inspection 

Within 6 months after the effective date of 

this AD, do a detailed inspection of the 

harnesses to verify that they are correctly 

marked and installed, in accordance with the 

‘‘SERVICE BULLETIN INSTRUCTIONS’’ of 

Advanced Aircraft Extinguishers Service 

Bulletin TFA10–26–0020, Revision IR, dated 

January 12, 2015. If any harness is not 

marked or installed correctly, before further 

flight, do steps C.(5) through C.(11) specified 

in and in accordance with the ‘‘SERVICE 

BULLETIN INSTRUCTIONS’’ of Advanced 

Aircraft Extinguishers Service Bulletin 

TFA10–26–0020, Revision IR, dated January 

12, 2015, except as required by paragraph (i) 

of this AD. 

(i) Exception to the Service Information 

Specification 

Where Advanced Aircraft Extinguishers 

Service Bulletin TFA10–26–0020, Revision 

IR, dated January 12, 2015, specifies 

contacting the manufacturer for appropriate 

action: Before further flight, repair in 

accordance with a method approved by the 

Manager, Wichita Aircraft Certification Office 

(ACO), FAA. 

(j) Special Flight Permit 

Special flight permits may be issued in 

accordance with sections 21.197 and 21.199 

of the Federal Aviation Regulations (14 CFR 

21.197 and 21.199) to operate the airplane, 

provided the airplane does not carry cargo in 

the lower cargo bay. 

(k) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Wichita Aircraft 

Certification Office (ACO), FAA, has the 

authority to approve AMOCs for this AD, if 

requested using the procedures found in 14 

CFR 39.19. In accordance with 14 CFR 39.19, 

send your request to your principal inspector 

or local Flight Standards District Office, as 

appropriate. If sending information directly 

to the manager of the ACO, send it to the 

attention of the person identified in 

paragraph (l)(1) of this AD. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the local flight standards district office/

certificate holding district office. 

(3) Except as required by paragraph (i) of 

this AD: For service information that 

contains steps that are labeled as Required 

for Compliance (RC), the provisions of 

paragraphs (k)(3)(i) and (k)(3)(ii) apply. 

(i) The steps labeled as RC, including 

substeps under an RC step and any figures 

identified in an RC step, must be done to 

comply with the AD. An AMOC is required 

for any deviations to RC steps, including 

substeps and identified figures. 

(ii) Steps not labeled as RC may be 

deviated from using accepted methods in 

accordance with the operator’s maintenance 

or inspection program without obtaining 

approval of an AMOC, provided the RC steps, 

including substeps and identified figures, can 

still be done as specified, and the airplane 

can be put back in an airworthy condition. 

(l) Related Information 

(1) For more information about this AD, 

contact Paul C. DeVore, Aerospace Engineer, 

Systems and Propulsion Branch, ACE–116W, 

FAA, Wichita ACO, 1801 Airport Road, 

Room 100, Mid-Continent Airport, Wichita, 

KS 67209; phone: 316–946–4142; fax: 316– 

946–4107; email: paul.devore@faa.gov. 

(2) For service information identified in 

this AD, contact Advanced Aircraft 

Extinguishers, 1052 SW Luttrell, Blue 

Springs, MO 64015; telephone: 816–228– 

3322; Internet www.aae-ltd.com. You may 

view this referenced service information at 

the FAA, Transport Airplane Directorate, 

1601 Lind Avenue SW., Renton, WA. For 

information on the availability of this 

material at the FAA, call 425–227–1221. 


asabaliauskas on DSK5VPTVN1PROD with PROPOSALS
38036 Federal Register / Vol. 80, No. 127 / Thursday, July 2, 2015 / Proposed Rules 

Issued in Renton, Washington, on June 24, 

2015. 

Dionne Palermo, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2015–16155 Filed 7–1–15; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2015–1991; Directorate 

Identifier 2014–NM–251–AD] 

RIN 2120–AA64 

Airworthiness Directives; Airbus 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for all 

Airbus Model A318–111 and –112 

airplanes; Model A319–111, –112, and 

–115 airplanes; Model A320–214 

airplanes; and Model A321–111, –112, 

–211, –212, and –213 airplanes. This 

proposed AD was prompted by reports 

of cracked cadmium-plated lock nuts 

that attach the hinge to the fan cowl 

door. This proposed AD would require 

inspecting to determine the serial 

number of each engine fan cowl door, 

inspecting for cracking of the hinge lock 

nuts of any affected door, and replacing 

the lock nuts if necessary. We are 

proposing this AD to detect and correct 

cracking of the hinge lock nuts, which 

could result in separation of the hinge 

from the fan cowl door, in-flight loss of 

the door, and consequent damage to the 

airplane. 

DATES: We must receive comments on 

this proposed AD by August 17, 2015. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: 202–493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE., 

Washington, DC 20590. 

• Hand Delivery: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE., 

Washington, DC, between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this proposed AD, contact the following: 

For Airbus service information 

contact Airbus, Airworthiness Office— 

EIAS, 1 Rond Point Maurice Bellonte, 

31707 Blagnac Cedex, France; 

telephone: +33 5 61 93 36 96; fax: +33 

5 61 93 44 51; email: account.airwortheas@airbus.com; Internet http://

www.airbus.com. 

For Goodrich service information 

contact Goodrich Aerostructures, 850 

Lagoon Drive, Chula Vista, California, 

91910–2098; telephone: 619–691–2719; 

email: jan.lewis@goodrich.com; Internet: 

http://www.goodrich.com/TechPubs. 

You may view this referenced service 

information at the FAA, Transport 

Airplane Directorate, 1601 Lind Avenue 

SW., Renton, WA. For information on 

the availability of this material at the 

FAA, call 425–227–1221. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http://

www.regulations.gov by searching for 

and locating Docket No. FAA–2015– 

1991; or in person at the Docket 

Management Facility between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The AD docket 

contains this proposed AD, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket Operations 

office (telephone 800–647–5527) is in 

the ADDRESSES section. Comments will 

be available in the AD docket shortly 

after receipt. 

FOR FURTHER INFORMATION CONTACT: 

Sanjay Ralhan, Aerospace Engineer, 

International Branch, ANM–116, 

Transport Airplane Directorate, FAA, 

1601 Lind Avenue SW., Renton, WA 

98057–3356; telephone: 425–227–1405; 

fax: 425–227–1149. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposed AD. Send your comments 

to an address listed under the 

ADDRESSES section. Include ‘‘Docket No. 

FAA–2015–1991; Directorate Identifier 

2014–NM–251–AD’’ at the beginning of 

your comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this proposed AD. We will 

consider all comments received by the 

closing date and may amend this 

proposed AD based on those comments. 

We will post all comments we 

receive, without change, to http://

www.regulations.gov, including any 

personal information you provide. We 

will also post a report summarizing each 

substantive verbal contact we receive 

about this proposed AD. 

Discussion 

The European Aviation Safety Agency 

(EASA), which is the Technical Agent 

for the Member States of the European 

Union, has issued EASA Airworthiness 

Directive 2014–0276, dated December 

19, 2014 (referred to after this as the 

Mandatory Continuing Airworthiness 

Information, or ‘‘the MCAI’’), to correct 

an unsafe condition for all Airbus 

Model A318–111 and –112 airplanes; 

Model A319–111, –112, and –115 

airplanes; Model A320–214 airplanes; 

and Model A321–111, –112, –211, –212, 

and –213 airplanes. The MCAI states: 

In-service findings have been reported of 

cracked cadmium plated lock nuts. This 

cracking occurs shortly after installation. 

Investigation results attribute the cause to an 

improper manufacturing procedure of the 

nuts. It was determined that the affected 

batch of lock nuts was used on the fan cowl 

to attach hinges to the cowl doors on 

CFM56–5B engines only. 

This condition, if not corrected, could lead 

to separation of the hinge from the fan cowl 

door, possibly resulting in in-flight loss of a 

fan cowl door, with consequent damage to 

the aeroplane and/or injury to persons on the 

ground. 

For the reasons describes above, this 

[EASA] AD required identification of the 

affected fan cowl doors, a one-time 

inspection of the fan cowl door hinge nuts 

and, depending on findings, replacement of 

the affected nuts. 

You may examine the MCAI in the 

AD docket on the Internet at http://

www.regulations.gov by searching for 

and locating Docket No. FAA–2015– 

1991. 

Related Service Information Under 1 

CFR Part 51 

Airbus has issued Service Bulletin 

A320–71–1062, including Appendix 01, 

dated July 28, 2014. Goodrich 

Aerostructures has issued Service 

Bulletin RA32071–151, dated June 11, 

2014. The service information describes 

procedures for inspection of the hinge 

nuts of the fan cowl door, and 

replacement if necessary. This service 

information is reasonably available 

because the interested parties have 

access to it through their normal course 

of business or by the means identified 

in the ADDRESSES section of this NPRM. 

FAA’s Determination and Requirements 

of This Proposed AD 

This product has been approved by 

the aviation authority of another 

country, and is approved for operation 


asabaliauskas on DSK5VPTVN1PROD with PROPOSALS