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[Federal Register Volume 81, Number 71 (Wednesday, April 13, 2016)]
[Rules and Regulations]
[Pages 21716-21720]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2016-08359]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2015-3147; Directorate Identifier 2014-NM-094-AD; 
Amendment 39-18479; AD 2016-08-03]
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 777-200, -200LR, -300, and -300ER series 
airplanes. This AD was prompted by reports of fractured forward attach 
fittings of the inboard flap outboard aft flap track. The fractured 
fittings were determined to be the result of corrosion pits forming on 
the inside diameter of the fittings. This AD requires an inspection for 
the affected part number and serial number of the main flap; various 
additional repetitive inspections of the fitting, if necessary; and 
replacement of the fitting or nested bushing installation, if 
necessary, which would terminate the inspections. This AD also provides 
an optional terminating action for the repetitive inspections. We are 
issuing this AD to detect and correct fracture of the fitting, which 
could result in the loss of the inboard aft flap and could lead to a 
punctured fuselage, causing injury to the flightcrew and passengers, 
and damage to the airplane.

DATES: This AD is effective May 18, 2016.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of May 18, 
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-2015-
3147.

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-
3147; 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, 1601 Lind 
Avenue SW., Renton, WA 98057-3356; telephone: 425-917-6412; fax: 425-
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 777-200, -200LR, -300, and -300ER series airplanes. The NPRM 
published in the Federal Register on August 25, 2015 (80 FR 51491) 
(``the NPRM''). The NPRM was prompted by reports of fractured forward 
attach fittings of the inboard flap outboard aft flap track. The 
fractured fittings were determined to be the result of corrosion pits 
forming on the inside diameter of the fittings. The NPRM proposed to 
require an inspection for the affected part number and serial number of 
the main flap; various additional repetitive inspections of the 
fitting, if necessary; and replacement of the fitting or nested bushing 
installation, if necessary, which would terminate the inspections. The 
proposed AD also provided an optional terminating action for the 
repetitive inspections. We are issuing this AD to detect and correct 
fracture of the fitting, which could result in the loss of the inboard 
aft flap and could lead to a punctured fuselage, causing injury to

[[Page 21717]]

the flightcrew and passengers, and damage to the airplane.

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. Benjamin Kerensa commented that he 
supports the NPRM.

Request To Change Terminology

    Boeing requested that we change the phrase ``inboard flap of the 
main flap'' to ``main flap of the inboard flap assembly'' in paragraphs 
(g) and (h) of the proposed AD. Boeing stated that this would clarify 
the inspection location.
    We agree with the commenter's request for the reason provided by 
the commenter. We have revised paragraphs (g) and (h) of this AD 
accordingly.

Request To Clarify Requirements of a Certain Terminating Action

    Boeing requested that we revise the terminating action specified in 
paragraph (k)(1) of the proposed AD. Boeing recommended that at the end 
of paragraph (k)(1) of the proposed AD, we add the following language, 
``Prior to accomplishing this option, the inspections of paragraph (h) 
must be accomplished and no cracking must have been found during that 
inspection.'' Boeing commented that the bushing replacement is only a 
terminating action if the fitting has been verified to be crack free.
    We agree to clarify the terminating action. As specified in Boeing 
Special Attention Service Bulletin 777-57-0094, Revision 1, dated 
November 5, 2014, if cracking is found during an inspection that is 
part of the terminating action, a fitting replacement must be done 
instead of the terminating action. In addition, Boeing Special 
Attention Service Bulletin 777-57-0094, Revision 1, dated November 5, 
2014, specifies that if corrosion cannot be removed during the 
terminating action, a fitting replacement must be done instead of the 
terminating action.
    Therefore, we have revised paragraph (k)(1) of this AD to specify 
that the terminating action is acceptable provided no cracking is found 
during any inspection specified in Part 4 of the Accomplishment 
Instructions of Boeing Special Attention Service Bulletin 777-57-0094, 
Revision 1, dated November 5, 2014, and all corrosion has been removed.
    We have also clarified the terminating actions specified in 
paragraphs (h), (i), (j), (k)(1), (k)(2), and (k)(3) of this AD to 
specify the terminating actions apply only to that fitting on which the 
terminating action is done.
    In addition, we have clarified the actions specified in paragraphs 
(i)(3)(i), (i)(3)(ii), and (i)(3)(iii) of this AD by specifying the 
actions include doing all applicable related investigative actions. 
Also, we have clarified the actions specified in paragraphs (j)(1) and 
(j)(2) of this AD by specifying the actions include doing all 
applicable related investigative and corrective actions.

Request To Clarify Terminating Action Is an Option to the Inspections

    Boeing and American Airlines (AA) requested that we clarify that 
the terminating action can be done instead of the inspections. AA 
commented to revise the terminating action paragraph to state the 
following:

    If any inboard flap of the main flap having an affected part 
number and serial number is found during the inspection required by 
paragraph (g) of this AD: Except as provided by paragraph (l) of 
this AD, at the applicable time specified in paragraph 1.E., 
``Compliance,'' of Boeing Special Attention Service Bulletin 777-57-
0094, Revision 1, dated November 5, 2014, do the terminating action 
in paragraph (k)(1), (k)(2), or (k)(3) of this AD or do the 
inspections specified in paragraph (h)(1) or (h)(2) of this AD, in 
accordance with the Accomplishment Instructions of Boeing Special 
attention Service Bulletin 777-57-0094, Revision 1, dated November 
5, 2014. Repeat the inspections thereafter at the applicable times 
specified in paragraph 1.E., ``Compliance,'' of Boeing Special 
Attention Service Bulletin 777-57-0094, Revision 1, dated November 
5, 2014, until a terminating action in paragraph (k)(1), (k)(2), or 
(k)(3) of this AD is done.

    AA commented that this change would align the proposed rule with 
paragraph 1.E., ``Compliance,'' table 1 and table 2, of Boeing Special 
Attention Service Bulletin 777-57-0094, Revision 1, dated November 5, 
2014. AA also stated that this would clearly indicate that the 
terminating action would preclude having to accomplish first the 
initial inspection requirement in paragraph (h) of the proposed AD. 
Boeing requested that we add a sentence to the end of paragraph (h) to 
specify that the inspections are not required for any affected inboard 
flap assembly where one of the terminating actions specified in 
paragraph (k)(1), (k)(2), or (k)(3) of the proposed AD have been done.
    We agree with the commenters' request. We have revised paragraph 
(h) of this AD to clarify that the terminating actions may preclude the 
initial inspections because rework or replacement of the parts prevent 
the unsafe condition.

Request To Clarify the Applicability

    Delta Airlines (DAL) requested that we clarify whether paragraph 
(c) of the proposed AD is intended for all Model 777-200, -200LR, -300, 
and -300ER series airplanes, or all Model 777-200, -200LR, -300 and -
300ER series airplanes, identified as Groups 1, 2, and 4 airplanes in 
Boeing Special Attention Service Bulletin 777-57-0094, Revision 1, 
dated November 5, 2014.
    DAL stated that paragraph (c) of the proposed AD does not contain 
Boeing Special Attention Service Bulletin 777-57-0094, Revision 1, 
dated November 5, 2014, to identify the airplane's applicability for 
the proposed AD. DAL commented that in the proposed rule under 
``Differences Between This Proposed AD and the Service Information,'' 
the airplane's applicability is stated. DAL also stated that the same 
paragraph states that the proposed AD is applicable only to Groups 1, 
2, and 4 airplanes (Model 777-200, -200LR, -300 and -300ER series 
airplanes) specified in Boeing Service Bulletin 777-57-0094, Revision 
1, dated November 5, 2014. DAL commented that a review of the 
``Compliance'' paragraph in the service information indicates that the 
FAA will possibly release an AD for airplanes in Groups 1, 2, and 4.
    We agree with the commenter's request to clarify the applicability 
of this AD. This AD applies to all Model 777-200, -200LR, -300, and -
300ER series airplanes as specified in paragraph (c) of this AD. The 
description of Groups 1, 2, and 4 airplanes in section 1.A., 
``Effectivity,'' of Boeing Special Attention Service Bulletin 777-57-
0094, Revision 1, dated November 5, 2014, specifies Model 777-200, -
200LR, -300, and -300ER series airplanes. Additionally, as noted in the 
service information, the table of variable numbers given in section 
1.A., ``Effectivity,'' only reflects up to line number 1322, and 
affected airplanes after line number 1322 will be added to the profile 
page of MyBoeingFleet.com. Therefore, this AD applies to all Model 777-
200, -200LR, -300, and -300ER series airplanes. We have not changed 
this AD in this regard.

Conclusion

    We reviewed the relevant data, considered the comments received, 
and determined that air safety and the public interest require adopting 
this AD with the changes described previously and minor editorial 
changes. We have determined that these minor changes:

[[Page 21718]]

     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.
    We also determined that these changes will not increase the 
economic burden on any operator or increase the scope of this AD.

Related Service Information Under 1 CFR Part 51

    We reviewed Boeing Special Attention Service Bulletin 777-57-0094, 
Revision 1, dated November 5, 2014. The service information describes 
procedures for an inspection for the affected part number and serial 
number of the main flap; various additional repetitive inspections of 
the fitting, if necessary; and replacement of the fitting or nested 
bushing installation, if necessary, which would terminate the 
inspections. The service information also describes an optional 
terminating action for the repetitive inspections. 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 148 airplanes of U.S. registry.
    We estimate the following costs to comply with this AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                Cost on U.S.
              Action                    Labor cost        Parts cost    Cost per product          operators
----------------------------------------------------------------------------------------------------------------
Inspection to determine the part   3 work-hours x $85             $0  $255................  $37,740.
 number.                            per hour = $255.
Additional Inspections...........  Up to 7                         0  Up to $595, per       Up to $88,060, per
                                    work[dash]hours x                  cycle.                cycle.
                                    $85 per hour =
                                    $595, per cycle.
----------------------------------------------------------------------------------------------------------------

    We estimate the following costs to do any necessary replacements 
that will be required based on the results of the inspection. The 
nested bushing installation of the attach fitting and the fitting 
replacement are also optional terminating actions. We have no way of 
determining the number of aircraft on which these actions might be 
done.

                                               On-Condition Costs
----------------------------------------------------------------------------------------------------------------
                    Action                                 Labor cost              Parts cost   Cost per product
----------------------------------------------------------------------------------------------------------------
Nested bushing installation of the attach       40 work-hours x $85 per hour =            $45            $3,445.
 fitting.                                        $3,400.
Fitting replacement...........................  73 work-hours x $85 per hour =          7,400            13,605.
                                                 $6,205.
----------------------------------------------------------------------------------------------------------------

    According to the manufacturer, all of the costs of this 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, 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

    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

0
1. The authority citation for part 39 continues to read as follows:

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

Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive (AD):

2016-08-03 The Boeing Company: Amendment 39-18479; Docket No. FAA-
2015-3147; Directorate Identifier 2014-NM-094-AD.

(a) Effective Date

    This AD is effective May 18, 2016.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to all The Boeing Company Model 777-200, -200LR, 
-300, and -300ER series airplanes, certificated in any category.

[[Page 21719]]

(d) Subject

    Air Transport Association (ATA) of America Code 57, Wings.

(e) Unsafe Condition

    This AD was prompted by reports of fractured forward attach 
fittings of the inboard flap outboard aft flap track. The fractured 
fittings were determined to be the result of corrosion pits forming 
on the inside diameter of the fittings. We are issuing this AD to 
detect and correct fracture of the fitting, which could result in 
the loss of the inboard aft flap and could lead to a punctured 
fuselage, causing injury to the flightcrew and passengers, and 
damage to the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Inspection To Determine the Part Number

    At the applicable time specified in paragraph 1.E., 
``Compliance,'' of Boeing Special Attention Service Bulletin 777-57-
0094, Revision 1, dated November 5, 2014, except as provided by 
paragraph (l) of this AD: Do an inspection of the main flap of the 
inboard flap assembly for affected part and serial numbers, in 
accordance with the Accomplishment Instructions of Boeing Special 
Attention Service Bulletin 777-57-0094, Revision 1, dated November 
5, 2014. A review of airplane maintenance records is acceptable in 
lieu of this inspection if the part number and serial number of the 
inboard flap can be conclusively determined from that review.

(h) Additional Inspections

    If any main flap of the inboard flap assembly having an affected 
part number and serial number is found during the inspection 
required by paragraph (g) of this AD: Except as provided by 
paragraph (l) of this AD, at the applicable time specified in 
paragraph 1.E., ``Compliance,'' of Boeing Special Attention Service 
Bulletin 777-57-0094, Revision 1, dated November 5, 2014, do the 
terminating action specified in paragraph (k)(1), (k)(2), or (k)(3) 
of this AD, or do the inspections specified in paragraph (h)(1) or 
(h)(2) of this AD, in accordance with the Accomplishment 
Instructions of Boeing Special Attention Service Bulletin 777-57-
0094, Revision 1, dated November 5, 2014. Repeat the inspections 
thereafter at the applicable times specified in paragraph 1.E., 
``Compliance,'' of Boeing Special Attention Service Bulletin 777-57-
0094, Revision 1, dated November 5, 2014, until a terminating action 
in paragraph (k)(1), (k)(2), or (k)(3) of this AD is done. 
Accomplishing a terminating action specified in paragraph (k)(1), 
(k)(2), or (k)(3) of this AD terminates the inspections required by 
this paragraph for that fitting only.
    (1) At the forward attach fitting of the aft flap track of the 
inboard flap: Do a detailed inspection for cracking and bushing 
migration, and a high frequency eddy current inspection for 
cracking, in accordance with Part 2 of the Accomplishment 
Instructions of Boeing Special Attention Service Bulletin 777-57-
0094, Revision 1, dated November 5, 2014.
    (2) At the forward attach fitting of the aft flap track of the 
inboard flap: Do a detailed inspection for cracking and bushing 
migration, and an ultrasound inspection for cracking, in accordance 
with Part 3 of the Accomplishment Instructions of Boeing Special 
Attention Service Bulletin 777-57-0094, Revision 1, dated November 
5, 2014.

(i) Corrective Action for Bushing Migration

    If any bushing migration but no cracking is found during any 
inspection required by paragraph (h) of this AD: At the applicable 
times specified in paragraph 1.E., ``Compliance,'' of Boeing Special 
Attention Service Bulletin 777-57-0094, Revision 1, dated November 
5, 2014, do the actions specified in paragraphs (i)(1) through 
(i)(3) of this AD. Accomplishment of a terminating action specified 
in paragraph (i)(3) or (k) of this AD terminates the actions 
required by this paragraph for that fitting only.
    (1) Apply corrosion inhibiting compound BMS 3-23, Type II, 
around the bushing flanges on each side of the fitting, in 
accordance with the Accomplishment Instructions of Boeing Special 
Attention Service Bulletin 777-57-0094, Revision 1, dated November 
5, 2014. Re-apply the corrosion inhibiting compound at the time 
specified in paragraph 1.E., ``Compliance,'' of Boeing Special 
Attention Service Bulletin 777-57-0094, Revision 1, dated November 
5, 2014.
    (2) Repeat the inspections specified in paragraph (h)(1) or 
(h)(2) of this AD, except inspect for cracking only.
    (3) Do a terminating action specified in paragraph (i)(3)(i), 
(i)(3)(ii), or (i)(3)(iii) of this AD.
    (i) Install a nested bushing to the forward attach fitting of 
the aft flap track of the inboard flap, including doing all 
applicable related investigative actions, in accordance with Part 4 
of the Accomplishment Instructions of Boeing Special Attention 
Service Bulletin 777-57-0094, Revision 1, dated November 5, 2014.
    (ii) Replace the forward attach fitting of the aft flap track of 
the inboard flap with an aluminum fitting, including doing all 
applicable related investigative actions, in accordance with Part 5 
of the Accomplishment Instructions of Boeing Special Attention 
Service Bulletin 777-57-0094, Revision 1, dated November 5, 2014.
    (iii) Replace the forward attach fitting of the aft flap track 
of the inboard flap with a titanium fitting, including doing all 
applicable related investigative actions, in accordance with Part 6 
of the Accomplishment Instructions of Boeing Special Attention 
Service Bulletin 777-57-0094, Revision 1, dated November 5, 2014.

(j) Corrective Actions for Cracking

    If any cracking is found during any inspection required by 
paragraph (h) or (i)(3) of this AD: At the applicable time specified 
in paragraph 1.E., ``Compliance,'' of Boeing Special Attention 
Service Bulletin 777-57-0094, Revision 1, dated November 5, 2014, do 
a terminating action specified in paragraph (j)(1) or (j)(2) of this 
AD. Replacement of the forward attach fitting as specified in 
paragraph (j)(1) or (j)(2) of this AD terminates the actions in this 
AD for that fitting only.
    (1) Replace the forward attach fitting of the aft flap track of 
the inboard flap with an aluminum fitting, including doing all 
applicable related investigative and corrective actions, in 
accordance with Part 5 of the Accomplishment Instructions of Boeing 
Special Attention Service Bulletin 777-57-0094, Revision 1, dated 
November 5, 2014.
    (2) Replace the forward attach fitting of the aft flap track of 
the inboard flap with a titanium fitting, including doing all 
applicable related investigative and corrective actions, in 
accordance with Part 6 of the Accomplishment Instructions of Boeing 
Special Attention Service Bulletin 777-57-0094, Revision 1, dated 
November 5, 2014.

(k) Optional Terminating Actions

    (1) Installation of the nested bushing to the forward attach 
fitting of the aft flap track of the inboard flap, in accordance 
with Part 4 of the Accomplishment Instructions of Boeing Special 
Attention Service Bulletin 777-57-0094, Revision 1, dated November 
5, 2014, terminates the requirements of this AD for that fitting 
only, provided no cracking is found during any inspection specified 
in Part 4 of the Accomplishment Instructions of Boeing Special 
Attention Service Bulletin 777-57-0094, Revision 1, dated November 
5, 2014, and all corrosion has been removed.
    (2) Replacement of the forward attach fitting of the aft flap 
track of the inboard flap with an aluminum fitting, in accordance 
with Part 5 of the Accomplishment Instructions of Boeing Special 
Attention Service Bulletin 777-57-0094, Revision 1, dated November 
5, 2014, terminates the requirements of this AD for that fitting 
only.
    (3) Replacement of the forward attach fitting of the aft flap 
track of the inboard flap with a titanium fitting, in accordance 
with Part 6 of the Accomplishment Instructions of Boeing Special 
Attention Service Bulletin 777-57-0094, Revision 1, dated November 
5, 2014, terminates the requirements of this AD for that fitting 
only.

(l) Exception to the Service Information

    Where Boeing Special Attention Service Bulletin 777-57-0094, 
Revision 1, dated November 5, 2014, specifies a compliance time 
``after the original issue date of this service bulletin,'' this AD 
requires compliance within the specified compliance time after the 
effective date of this AD.

(m) Credit for Previous Actions

    (1) This paragraph provides credit for the actions specified in 
paragraphs (h)(1) and (h)(2) of this AD, if those actions were 
performed before the effective date of this AD using Boeing Special 
Attention Service Bulletin 777-57-0094, dated January 29, 2014, 
which is not incorporated by reference in this AD.
    (2) This paragraph provides credit for the actions specified in 
paragraph (h)(1) of this AD, if those actions were performed before 
the effective date of this AD using Boeing Multi Operator Message 
MOM-MOM-13-

[[Page 21720]]

0137-01B, dated February 21, 2013, which is not incorporated by 
reference in this AD.

(n) 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 (o)(1) of this AD. 
Information may be emailed to: 9-ANM-Seattle-ACO-AMOC-Requests@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 
(n)(4)(i) and (n)(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.

(o) 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; telephone: 425-917-
6412; fax: 425-917-6590; 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 (p)(3) and (p)(4) of this AD.

(p) 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 Special Attention Service Bulletin 777-57-0094, 
Revision 1, dated November 5, 2014.
    (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.
    (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/ibr-locations.html.

    Issued in Renton, Washington, on March 31, 2016.
Victor Wicklund,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2016-08359 Filed 4-12-16; 8:45 am]
 BILLING CODE 4910-13-P
```