[Federal Register Volume 71, Number 73 (Monday, April 17, 2006)]
[Proposed Rules]
[Pages 19662-19663]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E6-5666]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 97-ANE-09]


Airworthiness Directives; Rolls-Royce plc RB211 Trent 800 Series 
Turbofan Engines

AGENCY: Federal Aviation Administration, DOT.

ACTION: Proposed rule; withdrawal.

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SUMMARY: This action withdraws a notice of proposed rulemaking (NPRM).

[[Page 19663]]

That NPRM proposed to revise the existing airworthiness directive (AD) 
applicable to Rolls-Royce plc (RR) Model RB211 Trent 892, 884, 877, 
875, and 892B series turbofan engines. That proposed rule would have 
required initial and repetitive inspections of the angled drive upper 
shroud, the intermediate gearbox housing (IGH), and the external 
gearbox lower bevel box (LBB) housing, and initial and repetitive 
master magnetic chip detector (MCD) inspections. Since we issued that 
proposed rule, RR notified us that after reviewing the service 
experience and the original actions taken, the unsafe condition no 
longer exists and mandatory actions required by the proposed rule are 
no longer required. Accordingly, we withdraw the proposed rule.

FOR FURTHER INFORMATION CONTACT: Christopher Spinney, Aerospace 
Engineer, Engine Certification Office, FAA, Engine and Propeller 
Directorate, 12 New England Executive Park, Burlington, MA 01803; 
telephone (781) 238-7175; fax (781) 238-7199.

SUPPLEMENTARY INFORMATION: The FAA proposed to amend 14 CFR part 39 
with a proposed AD. The proposed AD applies to RR Model RB211 Trent 
892, 884, 877, 875, and 892B series turbofan engines. We published the 
proposed AD in the Federal Register on November 2, 1999 (64 FR 59137). 
That proposed action would have required initial and repetitive 
inspections of the angled drive upper shroud, the intermediate gearbox 
housing (IGH), and the external gearbox lower bevel box (LBB) housing. 
In addition, that proposed AD would have required initial and 
repetitive master magnetic chip detector (MCD) inspections. Also, that 
proposed AD would have eliminated the repetitive inspections of the 
IGH, external gearbox LBB housing, and the angled drive upper shroud, 
if the engines have incorporated modifications described in certain RR 
service bulletins. Also, that proposed AD would have increased the 
inspection interval for repetitive master MCD inspections. That 
proposed AD resulted from service experience since publication of AD 
97-06-13. We proposed that AD to prevent loss of oil, which could cause 
an engine fire, and in-flight engine shutdowns and airplane diversions 
caused by oil loss and bearing failures.
    Since we issued that proposed AD, RR notified us that after 
reviewing the service experience and the original actions taken, the 
unsafe condition no longer exists and mandatory actions required by the 
proposed AD are no longer required.
    Upon further consideration, we hereby withdraw the proposed rule 
based on RR's analysis and conclusion stated above.
    Withdrawal of this notice of proposed rulemaking constitutes only 
such action, and does not preclude the agency from issuing another 
notice in the future, nor does it commit the agency to any course of 
action in the future.
    Since this action only withdraws a notice of proposed rulemaking, 
it is neither a proposed nor a final rule. Executive Order 12866, the 
Regulatory Flexibility Act, or DOT Regulatory Policies and Procedures 
(44 FR 11034, February 26, 1979) do not cover this withdrawal.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

The Withdrawal

    Accordingly, we withdraw the notice of proposed rulemaking, Docket 
No. 97-ANE-09, published in the Federal Register on November 2, 1999 
(64 FR 59137).

    Issued in Burlington, Massachusetts, on April 11, 2006.
Francis A. Favara,
Manager, Engine and Propeller Directorate, Aircraft Certification 
Service.
[FR Doc. E6-5666 Filed 4-14-06; 8:45 am]
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