Airworthiness directives › 2013-23-12
AD 2013-23-12 Airworthiness Directives; Rolls-Royce plc Turbofan Engines
Applicability*9
This AD applies to all Rolls-Royce plc (RR) RB211 Trent 553-61, 553A2-61, 556-61, 556A2-61, 556B-61, 556B2-61, 560-61, and 560A2-61 turbofan engines.
Compliance
LP compressor fan blades eligible for installation are: (1) LP compressor fan blades with less than 4,000 FCSN; or (2) LP compressor fan blades with less than 4,000 FCSLR, if LP compressor fan blades were repaired using RR Alert Non-Modification Service Bulletin No. RB.211-72-AH149, Revision 1, dated May 3, 2013 or earlier version or, for initial restoration only, RB.211-72-H464, dated August 28, 2013.
Required actions
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.
Unsafe condition
Comply with this AD within the compliance times specified, unless already done. (1) If on the effective date of this AD, the LP compressor fan blades: (i) Have less that 3,750 flight cycles since new (FCSN) or flight cycles since last leading edge profile blade repair (FCSLR), replace or repair the LP compressor fan blade set before accumulating 4,000 FCSN or FCSLR; (ii) Have 3,750 or more FCSN or FCSLR, but less than 4,400 FCSN or FCSLR, replace or repair the LP compressor fan blade set within 250 flight cycles (FC), but not later than 4,500 FCSN or FCSLR; (iii) Have 4,400 FCSN or FCSLR or more, replace or repair the LP compressor fan blade set within 100 FC; or (iv) Have FCSN or FCSLR that are unknown, replace or repair the LP compressor fan blade set within 100 FC. (2) Thereafter, replace or repair the LP compressor fan blade set within every 4,000 FCSN or FCSLR.
Affected ADs
None.
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