58818 Federal Register / Vol. 81, No. 166 / Friday, August 26, 2016 / Rules and Regulations 

repair terminates the inspections required by 

paragraph (g) of this AD in the area covered 

by the repair only. 

(j) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Seattle 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 (k) of this AD. Information may be 

emailed to: 9-ANM-Seattle-ACO-AMOCRequests@faa.gov. 

(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) An AMOC that provides an acceptable 

level of safety may be used for any repair, 

modification, or alteration required by this 

AD if it is approved by the Boeing 

Commercial Airplanes Organization 

Designation Authorization (ODA) that has 

been authorized by the Manager, Seattle 

ACO, to make those findings. To be 

approved, the repair method, modification 

deviation, or alteration deviation must meet 

the certification basis of the airplane and the 

approval must specifically refer to this AD. 

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

this AD: For service information that 

contains steps that are labeled as RC, the 

provisions of paragraphs (j)(4)(i) and (j)(4)(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. 

(k) Related Information 

For more information about this AD, 

contact Wayne Lockett, Aerospace Engineer, 

Airframe Branch, ANM–120S, FAA, Seattle 

ACO, 1601 Lind Avenue SW., Renton, WA 

98057–3356; phone: 425–917–6447; fax: 425– 

917–6590; email: wayne.lockett@faa.gov. 

(l) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless the AD specifies otherwise. 

(i) Boeing Alert Service Bulletin 767– 

53A0268, dated April 1, 2015. 

(ii) Reserved. 

(3) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Data & Services 

Management, P.O. Box 3707, MC 2H–65, 

Seattle, WA 98124–2207; telephone 206– 

544–5000, extension 1; fax 206–766–5680; 

Internet https://www.myboeingfleet.com. 

(4) You may view this 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. 

(5) You may view this service information 

that is incorporated by reference at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, call 

202–741–6030, or go to: http://

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued in Renton, Washington, on August 

16, 2016. 

Dorr M. Anderson, 

Acting Manager, Transport Airplane 

Directorate Aircraft Certification Service. 

[FR Doc. 2016–20075 Filed 8–25–16; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2016–0463; Directorate 

Identifier 2015–NM–155–AD;Amendment 

39–18623; AD 2016–17–10] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for all The 

Boeing Company Model 777 airplanes. 

This AD was prompted by a report of an 

incident involving a landing in which 

the pilots needed to input corrections 

due to airplane yaw and roll to the right; 

the main landing gear (MLG) aft 

trunnion pin was later found to be 

fractured. This AD requires 

identification and replacement of 

certain MLG aft trunnion pins. We are 

issuing this AD to prevent a fractured 

MLG aft trunnion pin, which could 

result in collapse of the MLG and 

consequent loss of control of the 

airplane during landing. 

DATES: This AD is effective September 

30, 2016. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of September 30, 2016. 

ADDRESSES: For service information 

identified in this final rule, contact 

Boeing Commercial Airplanes, 

Attention: Data & Services Management, 

P.O. Box 3707, MC 2H–65, Seattle, WA 

98124–2207; telephone: 206–544–5000, 

extension 1; fax: 206–766–5680; 

Internet: https://

www.myboeingfleet.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. It is also available 

on the Internet at http://

www.regulations.gov by searching for 

and locating Docket No. FAA–2016– 

0463. 

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–2016– 

0463; 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 AD, the regulatory 

evaluation, any comments received, and 

other information. The address for the 

Docket Office (phone: 800–647–5527) is 

Docket Management Facility, U.S. 

Department of Transportation, Docket 

Operations, M–30, West Building 

Ground Floor, Room W12–140, 1200 

New Jersey Avenue SE., Washington, 

DC 20590. 

FOR FURTHER INFORMATION CONTACT: Eric 

Lin, Aerospace Engineer, Airframe 

Branch, ANM–120S, FAA, Seattle 

Aircraft Certification Office (ACO), 1601 

Lind Avenue SW., Renton, WA 98057– 

3356; phone: 425–917–6412; fax: 415– 

917–6590; email: eric.lin@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to all The Boeing Company Model 

777 airplanes. The NPRM published in 

the Federal Register on February 18, 

2016 (81 FR 8164) (‘‘the NPRM’’). The 

NPRM was prompted by a report of an 

incident involving a landing in which 

the pilots needed to input corrections 

due to airplane yaw and roll to the right; 

the MLG aft trunnion pin was later 

found to be fractured. The NPRM 

proposed to require identification and 

replacement of certain MLG aft trunnion 

pins. We are issuing this AD to prevent 

a fractured MLG aft trunnion pin, which 

could result in collapse of the MLG and 

consequent loss of control of the 

airplane during landing. 


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Comments 

We gave the public the opportunity to 

participate in developing this AD. The 

following presents the comments 

received on the NPRM and the FAA’s 

response to each comment. 

Support for the NPRM 

Three commenters indicated their 

support for the NPRM. 

Request To Update the Cost Section 

One commenter, Gilles Oriot, asked 

that we update the cost estimate to 

reflect the costs shown in Boeing 

Information Notice 777–32A0103 IN 03, 

dated February 2, 2015. 

We agree with the commenter and 

have updated the Costs of Compliance 

to reflect the updated information. 

Request To Add to Credit Information 

The Boeing Company, American 

Airlines, Air France, Korean Air, Etihad 

Airways, and All Nippon Airways 

requested that we allow installation of 

pins with serial numbers beginning with 

‘‘EGL’’ or ‘‘MAL’’ that have been 

inspected previously but were not 

marked ‘‘BASE METAL INSPECTED’’ to 

fulfill the requirements of the proposed 

AD. The commenters stated that the 

previous inspection may have been 

done as part of a previous overhaul or 

required inspection using other service 

information that did not specify to mark 

‘‘BASE METAL INSPECTED.’’ The 

commenters also stated that the actions 

specified in the service information are 

consistent with the requirements of the 

proposed AD. The commenters 

suggested various changes in order to 

allow installation of these parts. 

We acknowledge that previous 

inspections may have been done as part 

of an overhaul or previous service 

requests, but we do not agree with the 

suggested changes. We disagree because 

providing credit for the inspections 

required by this AD undermines the 

level of record review required by this 

AD for compliance, cannot ensure that 

the various actions taken for each pin 

are the same actions required by this 

AD, and may not provide an acceptable 

level of safety equivalent to this AD. 

Operators that would like credit for the 

actions performed before the effective 

date of this AD may request approval of 

an alternative method of compliance 

(AMOC). The request should include a 

list of affected pin serial numbers, the 

airplane on which each pin is currently 

installed (if applicable), and the actions 

that were performed for each pin with 

applicable service information. We have 

not changed this final rule regarding 

this issue. 

Request To Allow Alternative Part 

Marking 

FedEx requested that we allow the 

suffix ‘‘BMI’’ to be allowed for marking 

the pins. FedEx stated that its record 

keeping system can only track unique 

part number and serial number 

combinations; it is not capable of 

tracking the additional ‘‘BASE METAL 

INSPECTED’’ marking. 

We disagree with the commenter’s 

request. We disagree because pins can 

be rotated among other airplanes and 

operators. Operators need to be 

consistent with how the pins are 

identified to comply with this AD and 

ensure the safety of passengers and 

crew. We recommend that the 

commenter work with the manufacturer 

to identify a suitable method of 

compliance for future revision of the 

service information. We have not 

changed this final rule regarding this 

issue. 

Conclusion 

We reviewed the relevant data, 

considered the comments received, and 

determined that air safety and the 

public interest require adopting this AD 

as proposed, except for minor editorial 

changes. We have determined that these 

minor changes: 

• Are consistent with the intent that 

was proposed in the NPRM for 

correcting the unsafe condition; and 

• Do not add any additional burden 

upon the public than was already 

proposed in the NPRM. 

Related Service Information Under 

1 CFR Part 51 

We reviewed Boeing Alert Service 

Bulletin 777–32A0103, Revision 1, 

dated December 10, 2015. The service 

information describes procedures for 

identifying and replacing certain MLG 

aft trunnion pins. 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. 

Costs of Compliance 

We estimate that this AD affects 123 

airplanes of U.S. registry. 

We estimate the following costs to 

comply with this AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Inspection ................................ 2 work-hours × $85 per hour = $170 ..................................... $0 $170 $20,910 

We estimate the following costs to do 

any necessary replacements that would 

be required based on the results of the 

inspection. We have no way of 

determining the number of aircraft that 

might need this repair: 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

product 

Replacement of aft trunnion pin ...... 211 work-hours × $85 per hour = $17,935 ............................................... $5,291 $23,226 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

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 


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58820 Federal Register / Vol. 81, No. 166 / Friday, August 26, 2016 / Rules and Regulations 

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 

This AD will not have federalism 

implications under Executive Order 

13132. This AD will 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 that this AD: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

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

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. 

Adoption of the Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA amends 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): 

2016–17–10 The Boeing Company: 

Amendment 39–18623; Docket No. 

FAA–2016–0463; Directorate Identifier 

2015–NM–155–AD. 

(a) Effective Date 

This AD is effective September 30, 2016. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to all The Boeing 

Company Model 777–200, 777–200LR, 777– 

300, 777–300ER, and 777F series airplanes, 

certificated in any category. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 32, Landing gear. 

(e) Unsafe Condition 

This AD was prompted by a report of an 

incident involving a landing in which the 

pilots needed to input corrections due to 

airplane yaw and roll to the right; the main 

landing gear (MLG) aft trunnion pin was later 

found to be fractured. We are issuing this AD 

to prevent a fractured MLG aft trunnion pin, 

which could result in collapse of the MLG 

and consequent loss of control of the airplane 

during landing. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Aft Trunnion Pin Identification 

For airplanes on which the original 

airworthiness certificate or the original 

export certificate of airworthiness was issued 

on or before the effective date of this AD: 

Within 36 months after the effective date of 

this AD, identify the serial number and 

marking of the MLG aft trunnion pins, in 

accordance with Part 1 of the 

Accomplishment Instructions of Boeing Alert 

Service Bulletin 777–32A0103, Revision 1, 

dated December 10, 2015. 

(h) MLG Aft Trunnion Pin Replacement 

For any MLG aft trunnion pin that begins 

with serial number ‘‘EGL’’ or ‘‘MAL,’’ on 

which no ‘‘BASE METAL INSPECTED’’ 

marking is found, replace with a new or 

serviceable MLG aft trunnion pin within 36 

months after the effective date of this AD, in 

accordance with Part 2 of the 

Accomplishment Instructions of Boeing Alert 

Service Bulletin 777–32A0103, Revision 1, 

dated December 10, 2015. 

(i) Parts Installation Prohibition 

As of the effective date of this AD, no 

person may install, on any airplane, any MLG 

aft trunnion pin that begins with serial 

number ‘‘EGL’’ or ‘‘MAL’’ and is not marked 

‘‘BASE METAL INSPECTED.’’ 

(j) Credit for Previous Actions 

(1) This paragraph provides credit for the 

actions specified in paragraph (g) of this AD, 

if those actions were performed before the 

effective date of this AD using Boeing MultiOperator Message (MOM) MOM–MOM–15– 

0303–01B, dated May 13, 2015, which is not 

incorporated by reference in this AD. 

(2) This paragraph provides credit for the 

actions specified in paragraphs (g) and (h) of 

this AD, if those actions were performed 

before the effective date of this AD using 

Boeing Alert Service Bulletin 777–32A0103, 

dated September 11, 2015, which is not 

incorporated by reference in this AD. 

(k) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Seattle 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. Information may 

be emailed to: 9-ANM-Seattle-ACO-AMOCRequests@faa.gov. 

(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) An AMOC that provides an acceptable 

level of safety may be used for any repair, 

modification, or alteration required by this 

AD if it is approved by the Boeing 

Commercial Airplanes Organization 

Designation Authorization (ODA) that has 

been authorized by the Manager, Seattle 

ACO, to make those findings. To be 

approved, the repair method, modification 

deviation, or alteration deviation must meet 

the certification basis of the airplane and the 

approval must specifically refer to this AD. 

(4) For service information that contains 

steps that are labeled as Required for 

Compliance (RC), the provisions of 

paragraphs (k)(4)(i) and (k)(4)(ii) of this AD 

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 Eric Lin, Aerospace Engineer, 

Airframe Branch, ANM–120S, FAA, Seattle 

ACO, 1601 Lind Avenue SW., Renton, WA 

98057–3356; phone: 425–917–6412; fax: 415– 

917–6590; email: eric.lin@faa.gov. 

(2) Service information identified in this 

AD that is not incorporated by reference is 

available at the addresses specified in 

paragraphs (m)(3) and (m)(4) of this AD. 

(m) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless the AD specifies otherwise. 

(i) Boeing Alert Service Bulletin 777– 

32A0103, Revision 1, dated December 10, 

2015. 

(ii) Reserved. 

(3) For Boeing service information 

identified in this AD, contact Boeing 

Commercial Airplanes, Attention: Data & 

Services Management, P.O. Box 3707, MC 

2H–65, Seattle, WA 98124–2207; telephone: 

206–544–5000, extension 1; fax: 206–766– 

5680; Internet: https://

www.myboeingfleet.com. 


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(4) You may view this 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. 

(5) You may view this service information 

that is incorporated by reference at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, call 

202–741–6030, or go to: http://

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued in Renton, Washington, on August 

17, 2016. 

Dorr M. Anderson, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2016–20375 Filed 8–25–16; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2016–8846; Directorate 

Identifier 2016–NM–046–AD; Amendment 

39–18624; AD 2016–17–11] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule; request for 

comments. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

The Boeing Company Model 787–8 

airplanes. This AD requires a one-time 

inspection of the engine pylon wiring 

bracket on the left wing for the presence 

of an existing corner relief fillet, and 

corrective action if necessary. This AD 

was prompted by a report indicating 

that the engine pylon wiring bracket on 

certain airplanes was missing a corner 

relief fillet, which could result in stress 

concentration and cracking in the 

engine pylon wiring bracket. We are 

issuing this AD to detect and correct 

cracking in the engine pylon wiring 

bracket. Such cracking could result in 

damage to adjacent power feeders, 

subsequent electrical arcing in a 

flammable leakage zone, and 

consequent uncontrollable fire. 

DATES: This AD is effective September 

12, 2016. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of September 12, 2016. 

We must receive comments on this 

AD by October 11, 2016. 

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 20590, between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. 

For service information identified in 

this final rule, contact Boeing 

Commercial Airplanes, Attention: Data 

& Services Management, P.O. Box 3707, 

MC 2H–65, Seattle, WA 98124–2207; 

telephone 206–544–5000, extension 1; 

fax 206–766–5680; Internet https://

www.myboeingfleet.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. It is also available 

on the internet at http://

www.regulations.gov by searching for 

and locating Docket No. FAA–2016– 

8846. 

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–2016– 

8846; 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 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: Fnu 

Winarto, Aerospace Engineer, Systems 

and Equipment Branch, ANM–130S, 

FAA, Seattle Aircraft Certification 

Office (ACO), 1601 Lind Avenue SW., 

Renton, WA 98057–3356; phone: 425– 

917–6659; fax: 425–917–6590; email: 

fnu.winarto@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We received a report indicating that 

the engine pylon wiring bracket on 

certain airplanes is missing a corner 

relief fillet, because the engineering 

graphics for the engine pylon wiring 

bracket located on the left wing did not 

contain the corner relief fillet. A missing 

corner relief fillet could result in stress 

concentration and cracking in the 

bracket. The engineering graphics were 

subsequently revised to add the corner 

relief fillet, but the engine pylon wiring 

bracket part number was not changed. 

Therefore, brackets with and without an 

existing corner relief fillet have the 

same bracket part number. We are 

issuing this AD to prevent cracking in 

the engine pylon wiring bracket. Such 

cracking could result in damage to 

adjacent power feeders, subsequent 

electrical arcing in a flammable leakage 

zone, and consequent uncontrollable 

fire. 

Related Service Information Under 

1 CFR Part 51 

We reviewed Boeing Alert Service 

Bulletin B787–81205–SB570012–00, 

Issue 001, dated March 14, 2013. The 

service information describes 

procedures for a one-time inspection of 

the engine pylon wiring bracket on the 

left wing for the presence of existing 

corner relief fillets, re-identification of 

any bracket with an existing corner 

relief fillet, and replacement of any 

bracket without an existing corner relief 

fillet. 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. 

FAA’s Determination 

We are issuing 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. 

AD Requirements 

This AD requires accomplishing the 

actions specified in the service 

information described previously. 

FAA’s Justification and Determination 

of the Effective Date 

Currently, there are no domestic 

operators of the affected airplanes on 

the U.S. Register. Therefore, we find 

that notice and opportunity for prior 

public comment are unnecessary and 

that good cause exists for making this 

amendment effective in less than 30 

days. 

Comments Invited 

This AD is a final rule that involves 

requirements affecting flight safety and 


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