Airworthiness directives › 2003-10-02
AD 2003-10-02 Airworthiness Directives; Rolls-Royce plc RB211 Series Turbofan Engines
Applicability*9
This AD is applicable to Rolls-Royce plc (RR) RB211-524C2-19 and RB211-524C2-B-19 series turbofan engines. These engines are installed on, but not limited to Boeing 747 airplanes.
Compliance
Compliance with this AD is required at next parts exposure, but not later than October 10, 2005, unless already done. Replacement of LP Location Bearing Assembly (f) Replace LP compressor location bearing assembly P/N UL22848 or UL29054 with an improved design LP compressor location bearing assembly. Information on the replacement of the LP compressor bearing assembly can be found in RR Mandatory Service Bulletin No. RB.211-72-D021, Revision 2, dated March 5, 2001. Concurrent Parts Replacement (g) Either concurrently with, or before replacing the LP compressor location bearing assembly as specified in paragraph (f) of this AD, unless already done, replace IP compressor location bearing, IP compressor bearing support housing, IP compressor rear stub shaft, LP compressor location bearing support, oil transfer connector assembly, hydraulic oil seal housing, and hydraulic oil seal, with improved design parts. Information on the replacement of these improved design parts can be found in RR Service Bulletin No. RB.211-72-9446, dated October 15, 1993. Alternative Methods of
Unsafe condition
This AD was prompted by statistical analysis by the manufacturer of in-service premature bearing failures. The actions specified in this AD are intended to prevent LP compressor failure and uncontained disc failures, resulting in damage to the airplane.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1