Airworthiness Directives; Rolls-Royce plc Turbofan Engines

[Federal Register Volume 82, Number 106 (Monday, June 5, 2017)]
[Rules and Regulations]
[Pages 25723-25726]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2017-11412]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2014-0363; Directorate Identifier 2014-NE-08-AD; 
Amendment 39-18887; AD 2017-10-13]
RIN 2120-AA64


Airworthiness Directives; Rolls-Royce plc Turbofan Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: We are superseding airworthiness directive (AD) 2015-17-19 for 
all Rolls-Royce plc (RR) RB211 Trent 768-60, 772-60, and 772B-60 
turbofan engines. AD 2015-17-19 required inspection of the fan case 
low-pressure (LP) fuel tubes and associated clips and the fuel oil heat 
exchanger (FOHE) mounts and associated hardware. This AD requires an 
engine modification, which terminates the repetitive inspections. This 
AD was prompted by fractures on the LP fuel return tube at mid-span 
locations that were found with resulting fuel leaks. We are issuing 
this AD to correct the unsafe condition on these products.

DATES: This AD is effective July 10, 2017.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of July 10, 
2017.

ADDRESSES: For service information identified in this final rule, 
contact Rolls-Royce plc, Corporate Communications, P.O. Box 31, Derby, 
England, DE248BJ; phone: 011-44-1332-242424; fax: 011-44-1332-249936; 
email: http://www.rolls-royce.com/contact/civil_team.jsp; Web site: 
https://www.aeromanager.com. You may view this service information at 
the FAA, Engine & Propeller Directorate, 1200 District Avenue, 
Burlington, MA. For information on the availability of this material at 
the FAA, call 781-238-7125. It is also available on the Internet at 
http://www.regulations.gov by searching for and locating Docket No. 
FAA-2014-0363.

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-2014-
0363; 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 mandatory continuing airworthiness information, 
regulatory evaluation, any comments received, and other information. 
The address for the Docket Office (phone: 800-647-5527) is Document 
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: Wego Wang, Aerospace Engineer, Engine 
Certification Office, FAA, Engine & Propeller Directorate, 1200 
District Avenue, Burlington, MA 01803; phone:

[[Page 25724]]

781-238-7134; fax: 781-238-7199; email: [email protected].

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to supersede AD 2015-17-19, Amendment 39-18252 (80 FR 55232, 
September 15, 2015), (``AD 2015-17-19''). AD 2015-17-19 applied to the 
specified products. The NPRM published in the Federal Register on 
December 1, 2016 (81 FR 86630). The NPRM proposed to retain the 
requirements of AD 2015-17-19, and require an engine modification, 
which terminates the repetitive inspections.

Comments

    We gave the public the opportunity to participate in developing 
this AD. We considered the comment received.

Request To Delay Issuance

    American Airlines (AA) requested a delay of the issuance of this AD 
until the issues related to RR Alert Service Bulletin (ASB) RB.211-73-
AJ366, Initial Issue and Supplement, dated May 3, 2016, are resolved. 
AA is concerned that the difficulty of incorporating RR ASB RB.211-73-
AJ366 might put an airliner at risk of hydraulic fluid loss and that 
the production output of RR might not meet the demand of required 
replacements in response to an anticipated aircraft-level AD that would 
mandate the replacement of single-welded dampers with double-welded 
dampers.
    We disagree. We have determined that there are currently no issues 
with ASB RB.211-73-AJ366, Initial Issue and Supplement, dated May 3, 
2016. We have also determined that complying with ASB RB.211-73-AJ366, 
Initial Issue and Supplement, dated May 3, 2016, will not increase the 
risk of hydraulic fluid loss. Additionally, RR has determined that it 
has the capacity to meet the demand for replacement parts. We did not 
change this AD.

Conclusion

    We reviewed the available data, including the comment received, and 
determined that air safety and the public interest require adopting 
this AD as proposed.

Related Service Information Under 1 CFR Part 51

    RR has issued Alert Non-Modification Service Bulletin (NMSB) 
RB.211-73-AH522, Revision 4, dated January 18, 2016; Alert NMSB RB.211-
73-AH837, Revision 1, dated November 6, 2015; and ASB RB.211-73-AJ366, 
Initial Issue and Supplement, dated May 3, 2016. Alert NMSB RB.211-73-
AH522, Revision 4, dated January 18, 2016 describes procedures for 
inspecting and, if necessary, replacing worn rubber sections of the P-
clip. Alert NMSB RB.211-73-AH837, Revision 1, dated November 6, 2015 
describes procedures for inspecting and, if necessary, replacing the P-
clip attaching bracket, supporting hardware, and LP fuel tube. ASB 
RB.211-73-AJ366, Initial Issue and Supplement, dated May 3, 2016 
describes procedures for modification of the routing of fuel, oil, and 
hydraulic tube assemblies. 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.

Other Related Service Information

    RR has issued Service Bulletin RB.211-73-F343, Revision 4, dated 
May 26, 2011. This service information describes procedures for 
replacing the fuel tube assemblies and supporting hardware.

Costs of Compliance

    We estimate that this AD affects 108 engines installed on airplanes 
of U.S. registry. We also estimate that it would take about 6 hours per 
engine to perform the inspections in this AD. The average labor rate is 
$85 per hour. We also estimate that 54 of the engines will fail the 
inspections required by this AD. Replacement parts cost about $4,031 
per engine.
    We also estimate that it would take about 50 hours per engine to 
modify each engine. The modification would cost about $150,000 per 
engine. Based on these figures, we estimate the cost of this AD on U.S. 
operators to be $16,931,754.

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 to the extent 
that it justifies making a regulatory distinction, 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 part 39 of the Federal Aviation 
Regulations (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 removing airworthiness directive (AD) 
AD 2015-17-19, Amendment 39-18252 (80 FR 55232, September 15, 2015) and 
adding the following new AD:

2017-10-13 Rolls-Royce plc: Amendment 39-18887; Docket No. FAA-2014-
0363; Directorate Identifier 2014-NE-08-AD.

(a) Effective Date

    This AD is effective July 10, 2017.

(b) Affected ADs

    This AD supersedes AD 2015-17-19, Amendment 39-18252 (80 FR 
55232, September 15, 2015), (``AD 2015-17-19'').

(c) Applicability

    This AD applies to all Rolls-Royce plc (RR) RB211 Trent 768-60, 
772-60, and 772B-60

[[Page 25725]]

turbofan engines, if fitted with fuel tube, part number (P/N) 
FW53576, which was incorporated through RR production modification 
73-F343 or which were modified in service in accordance with RR 
Service Bulletin (SB) RB.211-73-F343, Revision 4, dated May 26, 
2011.

(d) Unsafe Condition

    This AD was prompted by fractures found on the low-pressure (LP) 
fuel return tube at mid span locations with resulting fuel leaks. We 
are issuing this AD to prevent failure of the fan case LP fuel tube, 
which could lead to an in-flight engine shutdown, loss of thrust 
control, and damage to the airplane.

(e) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.
    (1) Within 800 flight hours (FH) after October 20, 2015 (the 
effective date of AD 2015-17-19), or prior to further flight, 
whichever occurs later, and thereafter at intervals not to exceed 
800 FH, inspect the clip at the uppermost fan case LP fuel tube clip 
position, CP4881, and support bracket, P/N FW26692. Use 
Accomplishment Instructions, paragraph 3.A, of RR Alert Non-
Modification Service Bulletin (NMSB) RB.211-73-AH837, Revision 1, 
dated November 6, 2015, or paragraph 3.A. or 3.B. of RR Alert NMSB 
RB.211-73-AH522, Revision 4, dated January 18, 2016, to do the 
inspection.
    (i) If the clip at the uppermost clip position, CP4881, fails 
inspection, before further flight, replace the clip with a part 
eligible for installation and inspect the fan case LP fuel tube, P/N 
FW53576, for fretting, and clips for cracks or failure, according to 
Accomplishment Instructions, paragraph 3.A. of RR Alert NMSB RB.211-
73-AH837, Revision 1, dated November 6, 2015, or paragraph 3.A. or 
3.B. of RR Alert NMSB RB.211-73-AH522, Revision 4, dated January 18, 
2016.
    (ii) If the support bracket, P/N FW26692, fails inspection, 
before further flight, replace the bracket with a part eligible for 
installation and inspect the fan case LP fuel tube, P/N FW53576, and 
clips for cracks or failure, according to Accomplishment 
Instructions, paragraph 3.A. of RR Alert NMSB RB.211-73-AH837, 
Revision 1, dated November 6, 2015, or paragraph 3.A. or 3.B. of RR 
Alert NMSB RB.211-73-AH522, Revision 4, dated January 18, 2016.
    (2) Within 4,000 FH since new or 800 FH after October 20, 2015 
(the effective date of AD 2015-17-19), or prior to further flight, 
whichever occurs later, and thereafter at intervals not to exceed 
4,000 FH, inspect the fan case LP fuel tube, P/N FW53576, and clips, 
and the fuel oil heat exchanger (FOHE) mounts and hardware, for 
damage, wear, or fretting. Use paragraph 3.A. or 3.B., 
Accomplishment Instructions, of RR Alert NMSB RB.211-73-AH522, 
Revision 4, dated January 18, 2016, to do the inspection.
    (i) If the fan case LP fuel tube, P/N FW53576, fails inspection, 
before further flight, replace the fuel tube and clips with parts 
eligible for installation.
    (ii) If any FOHE mount or hardware shows signs of damage, wear, 
or fretting, before further flight, replace the damaged part with a 
part eligible for installation.
    (3) At each shop visit after the effective date of this AD, 
inspect the fan case LP fuel tubes, P/Ns FW26589, FW36335, FW26587, 
FW53577, and FW53576, and clips, and the FOHE mounts and hardware, 
for damage, wear, or fretting. Use paragraphs 3.B.(1) and 3.B.(2) of 
RR Alert NMSB RB.211-73-AH522, Revision 4, dated January 18, 2016, 
to do the inspection.
    (i) If any fan case LP fuel tube fails inspection, before 
further flight, replace the fuel tube and clips with parts eligible 
for installation.
    (ii) If any FOHE mount or hardware shows signs of damage, wear, 
or fretting, before further flight, replace the damaged part with a 
part eligible for installation.
    (4) If you replace any fan case LP fuel tube, clip, FOHE mount, 
or hardware as a result of the inspections in paragraphs (e)(1), 
(2), or (3) of this AD, you must still continue to perform the 
repetitive inspections specified in paragraphs (e)(1), (2), and (3) 
of this AD, until you comply with paragraph (e)(6) of this AD.
    (5) No reports requested in any of the Alert NMSBs that are 
referenced in paragraphs (e)(1), (2), and (3) of this AD are 
required by this AD.
    (6) During the next shop visit after the effective date of this 
AD, modify the engine in accordance with the Accomplishment 
Instructions, paragraphs (B) and (C), Section 3, of RR Alert Service 
Bulletin (ASB) RB.211-73-AJ366, Initial Issue and Supplement, dated 
May 3, 2016.
    (7) After the effective date of this AD, do not install an M07 
module, unless it is modified in accordance with the Accomplishment 
Instructions, paragraphs (B) and (C), Section 3, of RR ASB RB.211-
73-AJ366, Initial Issue and Supplement, dated May 3, 2016.

(f) Credit for Previous Actions

    If, before the effective date of this AD, you performed the 
inspections and corrective actions required by paragraph (e) of this 
AD using RR NMSB RB.211-73-G848, Revision 3, dated June 12, 2014; or 
RR Alert NMSB RB.211-73-AH837, Revision 1, dated November 6, 2015; 
or paragraph 3.A. or 3.B. of RR Alert NMSB RB.211-73-AH522, Revision 
4, dated January 18, 2016; or any earlier version of those NMSBs, 
you met the inspection requirements in paragraph (e) of this AD.

(g) Mandatory Terminating Action

    Modification of an engine, as required by paragraph (e)(6) of 
this AD, constitutes terminating action for the repetitive 
inspections required by paragraphs (e)(1), (2), (3), and (4) of this 
AD.

(h) Definitions

    For the purposes of this AD:
    (1) An ``engine shop visit'' is the induction of an engine into 
the shop for maintenance involving the separation of pairs of major 
mating engine flanges, except that the separation of engine flanges 
solely for the purposes of transportation without subsequent engine 
maintenance is not an engine shop visit.
    (2) The fan case LP fuel tubes and clips, and the FOHE mounts 
and hardware, are eligible for installation if they have passed the 
inspection requirements of paragraphs (e)(1), (2), and (3) of this 
AD.

(i) Alternative Methods of Compliance (AMOCs)

    The Manager, Engine Certification Office, FAA, may approve AMOCs 
to this AD. Use the procedures found in 14 CFR 39.19 to make your 
request. You may email your request to: [email protected].

(j) Related Information

    (1) For more information about this AD, contact Wego Wang, 
Aerospace Engineer, Engine Certification Office, FAA, Engine & 
Propeller Directorate, 1200 District Avenue, Burlington, MA 01803; 
phone: 781-238-7134; fax: 781-238-7199; email: [email protected].
    (2) Refer to MCAI European Aviation Safety Agency (EASA) AD 
2016-0120, dated June 17, 2016, which supersedes EASA AD 2014-0243, 
Revision 1, dated December 10, 2014 and Correction dated March 23, 
2015, for more information. You may examine the MCAI in the AD 
docket on the Internet at http://www.regulations.gov by searching 
for and locating it in Docket No. FAA-2014-0363.
    (3) RR SB RB.211-73-F343, Revision 4, dated May 26, 2011, which 
is not incorporated by reference in this AD, can be obtained from 
Rolls-Royce plc, using the contact information in paragraph (k)(3) 
of this AD.
    (5) You may view this service information at the FAA, Engine & 
Propeller Directorate, 1200 District Avenue, Burlington, MA. For 
information on the availability of this material at the FAA, call 
781-238-7125.

(k) 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) Rolls-Royce plc (RR) Alert Non-Modification Service Bulletin 
(NMSB) RB.211-73-AH522, Revision 4, dated January 18, 2016.
    (ii) RR Alert NMSB RB.211-73-AH837, Revision 1, dated November 
6, 2015.
    (iii) RR Alert Service Bulletin RB.211-73-AJ366, Initial Issue 
and Supplement, dated May 3, 2016.
    (3) For RR service information identified in this AD, contact 
Rolls-Royce plc, Corporate Communications, P.O. Box 31, Derby, 
England, DE248BJ; phone: 011-44-1332-242424; fax: 011-44-1332-
249936; email: http://www.rolls-royce.com/contact/civil_team.jsp; 
Web site: https://www.aeromanager.com.
    (4) You may view this service information at FAA, Engine & 
Propeller Directorate, 1200 District Avenue, Burlington, MA. For 
information on the availability of this material at the FAA, call 
781-238-7125.
    (5) You may view this service information at the National 
Archives and Records

[[Page 25726]]

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 Burlington, Massachusetts, on May 9, 2017.
Carlos A. Pestana,
Acting Assistant Manager, Engine & Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 2017-11412 Filed 6-2-17; 8:45 am]
 BILLING CODE 4910-13-P

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