[Federal Register Volume 75, Number 236 (Thursday, December 9, 2010)]
[Rules and Regulations]
[Pages 76624-76626]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-30832]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2010-0614; Directorate Identifier 2010-NE-24-AD;
Amendment 39-16538; AD 2010-25-05]
RIN 2120-AA64
Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG
Models BR700-710A1-10; BR700-710A2-20; and BR700-710C4-11 Turbofan
Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: We are adopting a new airworthiness directive (AD) for the
products listed above. This AD results from mandatory continuing
airworthiness information (MCAI) issued by an aviation authority of
another country to identify and correct an unsafe condition on an
aviation product. The MCAI describes the unsafe condition as:
Due to manufacturing problems of BR700-710 HP stage 1 and 2
turbine discs it was necessary to re-calculate the Declared Safe
Cyclic Life (DSCL) for all BR700-710 HP turbine discs. The analysis
concluded that it is required to reduce the approved life limits for
the HP turbine disc part numbers that are listed in Table 1 and
Table 2 of this AD (MCAI). Exceeding the revised approved life
limits could potentially result in non-contained disc failure.
We are issuing this AD to prevent-failure of the high-pressure
turbine (HPT) stage 1 and stage 2 discs, uncontained engine failure,
and damage to the airplane.
DATES: This AD becomes effective January 13, 2011.
ADDRESSES: The Docket Operations office is located at Docket Management
Facility, U.S. Department of Transportation, 1200 New Jersey Avenue,
SE., West Building Ground Floor, Room W12-140, Washington, DC 20590-
0001.
FOR FURTHER INFORMATION CONTACT: Mark Riley, Aerospace Engineer, Engine
Certification Office, FAA, Engine & Propeller Directorate, 12 New
England Executive Park, Burlington, MA 01803; e-mail:
[email protected]; telephone (781) 238-7758; fax (781) 238-7199.
SUPPLEMENTARY INFORMATION:
Discussion
We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 to include an AD that would apply to the specified products.
That NPRM was published in the Federal Register on August 23, 2010 (75
FR 51693). That NPRM proposed to correct an unsafe condition for the
specified products. The MCAI states that:
Due to manufacturing problems of BR700-710 HP stage 1 and 2
turbine discs it was necessary to re-calculate the Declared Safe
Cyclic Life (DSCL) for all BR700-710 HP turbine discs. The analysis
concluded that it is required to reduce the approved life limits for
the HP turbine disc part numbers that are listed in Table 1 and
Table 2 of this AD (MCAI). Exceeding the revised approved life
limits could potentially result in non-contained disc failure.
Comments
We gave the public the opportunity to participate in developing
this AD. We received no comments on the NPRM or on the determination of
the cost to the public.
Conclusion
We reviewed the available data and determined that air safety and
the public interest require adopting the AD as proposed.
Costs of Compliance
Based on the service information, we estimate that this AD will
affect about 1,026 BR700-710 engines of U.S. registry. We also estimate
that no additional labor cost will be incurred to replace the discs.
The average labor rate is $85 per work-hour. Required parts will cost
about $6,000 per disc. Based on these figures, we estimate the cost of
the AD on U.S. operators to be $6,156,000. Our cost estimate is
exclusive of possible warranty coverage.
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,
[[Page 76625]]
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 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 this AD:
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); and
3. 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.
We prepared a regulatory evaluation of the estimated costs to
comply with this AD and placed it in the AD docket.
Examining the AD Docket
You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Operations office
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 Operations office (phone (800) 647-5527) is provided in the
ADDRESSES section. Comments will be available in the AD docket shortly
after receipt.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Safety.
Adoption of the Amendment
0
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 AD:
2010-25-05 Rolls-Royce Deutschland Ltd & Co KG (formerly Rolls-Royce
Deutschland GmbH, formerly BMW Rolls-Royce GmbH): Amendment 39-
16538. Docket No. FAA-2010-0614; Directorate Identifier 2010-NE-24-
AD.
Effective Date
(a) This airworthiness directive (AD) becomes effective January
13, 2011.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Rolls-Royce Deutschland Ltd & Co KG
models BR700-710A1-10, BR700-710A2-20, and BR700-710C4-11 turbofan
engines with any of the high-pressure turbine (HPT) stage 1 and
stage 2 discs installed as listed by part number (P/N) in Table 1
and Table 2 of this AD. These engines are installed on, but not
limited to, Gulfstream model G-V and GV-SP airplanes, and Bombardier
model BD-700-1A10 and BD-700-1A11 airplanes.
Table 1--Declared Safe Cyclic Life of Affected HPT Stage 1 Discs
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Declared safe
HPT stage 1 disc P/N Engine model cyclic life
(flight cycles)
------------------------------------------------------------------------
BRR21215...................... BR700-710A1-10........ 6,075
BRR21215...................... BR700-710A2-20........ 5,950
BRR22005...................... BR700-710A1-10........ 6,200
BRR22005...................... BR700-710A2-20........ 6,200
BRR22006...................... BR700-710A1-10........ 6,200
BRR22006...................... BR700-710A2-20........ 6,200
BRR22007...................... BR700-710A1-10........ 6,200
BRR22007...................... BR700-710A2-20........ 6,200
BRR22358...................... BR700-710A1-10........ 6,200
BRR22358...................... BR700-710A2-20........ 6,200
BRR23864...................... BR700-710A1-10........ 6,200
BRR23864...................... BR700-710A2-20........ 6,200
BRR23884...................... BR700-710A1-10........ 6,200
BRR23884...................... BR700-710A2-20........ 6,200
BRR23885...................... BR700-710A1-10........ 6,200
BRR23885...................... BR700-710A2-20........ 6,200
BRR23952...................... BR700-710A1-10........ 6,200
BRR23952...................... BR700-710A2-20........ 6,200
BRR23952...................... BR700-710C4-11 6,200
(Service Bulletin
(SB) No. SB-BR700-72-
101466 not
incorporated).
BRR23952...................... BR700-710C4-11 (SB No. 3,800
SB-BR700-72-101466
incorporated).
BRR23953...................... BR700-710A1-10........ 6,200
BRR23953...................... BR700-710A2-20........ 6,200
BRR23953...................... BR700-710C4-11 (SB No. 6,200
SB-BR700-72-101466
not incorporated).
BRR23953...................... BR700-710C4-11 (SB No. 3,800
SB-BR700-72-101466
incorporated).
BRR23954...................... BR700-710A1-10........ 6,200
BRR23954...................... BR700-710A2-20........ 6,200
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[[Page 76626]]
Table 2--Declared Safe Cyclic Life of Affected HPT Stage 2 Discs
------------------------------------------------------------------------
Declared safe
HPT stage 2 disc P/N Engine model cyclic life
(flight cycles)
------------------------------------------------------------------------
BRR18291...................... BR700-710A1-10........ 9,300
BRR21214...................... BR700-710A1-10........ 9,600
BRR21214...................... BR700-710A2-20........ 9,600
BRR22008...................... BR700-710A1-10........ 10,500
BRR22008...................... BR700-710A2-20........ 10,500
BRR22008...................... BR700-710C4-11 (SB No. 10,500
SB-BR700-72-101466
not incorporated).
BRR22008...................... BR700-710C4-11 (SB No. 3,700
SB-BR700-72-101466
incorporated).
BRR22009...................... BR700-710A1-10........ 10,500
BRR22009...................... BR700-710A2-20........ 10,500
BRR22009...................... BR700-710C4-11 (SB No. 10,500
SB-BR700-72-101466
not incorporated).
BRR22009...................... BR700-710C4-11 (SB No. 3,700
SB-BR700-72-101466
incorporated).
BRR22010...................... BR700-710A1-10........ 10,500
BRR22010...................... BR700-710A2-20........ 10,500
BRR22359...................... BR700-710A1-10........ 10,500
BRR22359...................... BR700-710A2-20........ 10,500
------------------------------------------------------------------------
Reason
(d) This AD results from mandatory continuing airworthiness
information (MCAI) issued by an aviation authority of another country
to identify and correct an unsafe condition on an aviation product. The
MCAI states:
Due to manufacturing problems of BR700-710 HP stage 1 and 2
turbine discs it was necessary to re-calculate the Declared Safe
Cyclic Life (DSCL) for all BR700-710 HP turbine discs. The analysis
concluded that it is required to reduce the approved life limits for
the HP turbine disc part numbers that are listed in Table 1 and
Table 2 of this AD (MCAI). Exceeding the revised approved life
limits could potentially result in non-contained disc failure.
We are issuing this AD to prevent failure of the HPT stage 1 and
stage 2 discs, uncontained engine failure, and damage to the airplane.
Actions and Compliance
(e) Unless already done, do the following actions.
(1) Within 30 days after the effective date of this AD, or upon
accumulating the declared safe cyclic life indicated in Table 1 or
Table 2 of this AD as applicable, whichever occurs later, initially
replace the HPT stage 1 or HPT stage 2 discs with serviceable discs.
(2) Thereafter, upon accumulating the declared safe cyclic life
indicated in Table 1 or Table 2 of this AD, as applicable, repetitively
replace the HPT stage 1 or HPT stage 2 discs with serviceable discs.
FAA AD Differences
(f) None.
Alternative Methods of Compliance (AMOCs)
(g) The Manager, Engine Certification Office, FAA, has the
authority to approve AMOCs for this AD, if requested using the
procedures found in 14 CFR 39.19.
Related Information
(h) Refer to European Aviation Safety Agency AD 2010-0075, dated
April 20, 2010, and AD 2010-0076, dated April 20, 2010, for related
information.
(i) Refer to Rolls-Royce Deutschland Ltd & Co KG SB No. SB-BR700-
72-A900492, dated February 12, 2010, and SB No. SB-BR700-72-A900497,
dated February 12, 2010, for related information. Contact Rolls-Royce
Deutschland Ltd & Co KG, Eschenweg 11, Dahlewitz, 15827 Blankenfelde-
Mahlow, Germany, telephone: +49 (0) 33-7086-1883, fax: +49 (0) 33-7086-
3276, for a copy of this service information.
(j) Contact Mark Riley, Aerospace Engineer, Engine Certification
Office, FAA, Engine & Propeller Directorate, 12 New England Executive
Park, Burlington, MA 01803; e-mail: [email protected]; telephone (781)
238-7758; fax (781) 238-7199, for more information about this AD.
Issued in Burlington, Massachusetts, on November 30, 2010.
Peter A. White,
Assistant Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. 2010-30832 Filed 12-8-10; 8:45 am]
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