Airworthiness Directives; Rolls-Royce Deutschland Ltd. & Co KG (formerly Rolls-Royce plc), Models Spey 555-15, 555-15H, 555-15N, and 555-15P Turbojet Engines

[Federal Register Volume 69, Number 226 (Wednesday, November 24, 2004)]
[Rules and Regulations]
[Pages 68251-68252]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 04-25790]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 2003-NE-51-AD; Amendment 39-13881; AD 2004-24-05]
RIN 2120-AA64


Airworthiness Directives; Rolls-Royce Deutschland Ltd. & Co KG 
(formerly Rolls-Royce plc), Models Spey 555-15, 555-15H, 555-15N, and 
555-15P Turbojet Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
Rolls-Royce Deutschland Ltd. & Co KG (RRD) (formerly Rolls-Royce plc), 
models Spey 555-15, 555-15H, 555-15N, and 555-15P turbojet engines, 
with magnesium split low pressure (LP) compressor case, part number (P/
N) EU.73418A installed. This AD requires replacement of the magnesium 
split LP compressor case with a serviceable compressor case that is a 
combination of a steel front LP compressor case and a shortened split 
compressor case. This AD results from several reports of bird ingestion 
and LP compressor stage 1 rotor blade failures that have resulted in 
penetration of the magnesium LP compressor case, and damage to the 
airplane.

DATES: This AD becomes effective December 29, 2004.

ADDRESSES: You can get the service information identified in this AD 
from Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, D-15827 
Dahlewitz, Germany, telephone +49 (0) 33-7086-1768; fax +49 (0) 33-
7086-3356.
    You may examine the AD docket at the FAA, New England Region, 
Office of the Regional Counsel, 12 New England Executive Park, 
Burlington, MA.

FOR FURTHER INFORMATION CONTACT: Jason Yang, Aerospace Engineer, Engine 
Certification Office, FAA, Engine and Propeller Directorate, 12 New 
England Executive Park, Burlington, MA 01803-5299; telephone (781) 238-
7747; fax (781) 238-7199.

SUPPLEMENTARY INFORMATION: The FAA proposed to amend 14 CFR part 39 
with a proposed AD. The proposed AD applies to RRD models Spey 555-15, 
555-15H, 555-15N, and 555-15P turbojet engines, with magnesium split LP 
compressor case, P/N EU.73418A installed. We published the proposed AD 
in the Federal Register on February 20, 2003 (68 FR 8157). That action 
proposed to require replacement of the magnesium split LP compressor 
case with a serviceable LP compressor case that is a combination of a 
steel front LP compressor case and a shortened split LP compressor 
case.

Examining the AD Docket

    You may examine the AD Docket (including any comments and service 
information), by appointment, between 8 a.m. and 4:30 p.m., Monday 
through Friday, except Federal holidays. See ADDRESSES for the 
location.

Comments

    We provided the public the opportunity to participate in the 
development of this AD. We have considered the one comment received.
    One commenter requests that special flight permits be added to the 
final rule. We do not agree. On July 22, 2002, the FAA revised 14 CFR 
part 39 by adding the Special Flight Permit provision. Doing this 
allowed us to omit that provision from ADs, to help place the focus of 
ADs on the unsafe condition that created the need for each directive. 
ADs that allow Special Flight Permits with conditions, or that prohibit 
Special Flight Permits, will state those conditions in the compliance 
section. ADs that do not specify special flight conditions or do not 
prohibit special flight permits will not reference Special Flight 
Permits. If operators want to request Special Flight Permits, they must 
request them by following the procedure in 14 CFR part 39, Sec.  39.25. 
Also, because this final rule requires that the actions be done within 
60 months after the effective date of the AD, we anticipate no requests 
for a Special Flight Permit due to the amount of lead time available to 
comply with the AD.

Conclusion

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

Costs of Compliance

    There are about 184 RRD models Spey 555-15, 555-15H, 555-15N, and 
555-15P turbojet engines of the affected design in the worldwide fleet. 
We estimate that 34 engines installed on airplanes of U.S. registry 
will be affected by this AD. We also estimate that it will take about 6 
work hours per engine to perform the actions, and that the average 
labor rate is $65 per work hour. Required parts will cost about $37,000 
per engine. Based on these figures, we estimate the total cost of the 
AD to U.S. operators to be $1,271,260.

Regulatory Findings

    We have 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 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); 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 summary of the costs to comply with this AD and 
placed it in

[[Page 68252]]

the AD Docket. You may get a copy of this summary by sending a request 
to us at the address listed under ADDRESSES. Include ``AD Docket No. 
2003-NE-51-AD'' in your request.

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 Federal Aviation Administration 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:

2004-24-05 Rolls-Royce Deutschland Ltd. & Co KG (formerly Rolls-
Royce plc): Amendment 39-13881. Docket No. 2003-NE-51-AD.

Effective Date

    (a) This airworthiness directive (AD) becomes effective December 
29, 2004.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Rolls-Royce Deutschland Ltd. & Co KG 
(RRD) (formerly Rolls-Royce plc), models Spey 555-15, 555-15H, 555-
15N, and 555-15P turbojet engines, with magnesium split low pressure 
(LP) compressor case, part number (P/N) EU.73418A installed. These 
engines are installed on, but not limited to, Fokker F.28 Mark 1000, 
Mark 2000, Mark 3000, and Mark 4000 series airplanes.

Unsafe Condition

    (d) This AD is prompted by several reports of bird ingestion and 
LP compressor stage 1 rotor blade failures that have resulted in 
penetration of the magnesium split LP compressor case and damage to 
the airplane. We are issuing this AD to prevent possible uncontained 
LP compressor stage 1 rotor blade failures that could result in 
damage to the airplane.

Compliance

    (e) You are responsible for having the actions required by this 
AD performed within 60 months after the effective date of this AD, 
unless the actions have already been done.

Replacement of Magnesium Split LP Compressor Case With a Serviceable 
Compressor Case

    (f) Remove the magnesium split LP compressor case, P/N 
EU.73418A, from the engine and install a serviceable LP compressor 
case. Information on removing and replacing this P/N case can be 
found in RRD Service Bulletin No. Sp72-893, Revision 3, dated August 
25, 2003.

Alternative Methods of Compliance

    (g) The Manager, Engine Certification Office, has the authority 
to approve alternative methods of compliance for this AD if 
requested using the procedures found in 14 CFR 39.19.

Material Incorporated by Reference

    (h) None.

Related Information

    (i) LBA airworthiness directive 2003-261, dated August 25, 2003, 
also addresses the subject of this AD.

    Issued in Burlington, Massachusetts, on November 15, 2004.
Jay J. Pardee,
Manager, Engine and Propeller Directorate, Aircraft Certification 
Service.
[FR Doc. 04-25790 Filed 11-23-04; 8:45 am]
BILLING CODE 4910-13-P

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