Airworthiness directives › 2017-08-11
AD 2017-08-11 Airworthiness Directives; Rolls-Royce plc Turbofan Engines
Applicability*9
This AD applies to all Rolls-Royce plc (RR) RR RB211-Trent 875-17, 877-17, 884-17, 884B-17, 892-17, 892B-17, and 895-17 turbofan engines.
Compliance
Comply with this AD within the compliance times specified, unless already done. (1) After the effective date of this AD, remove from service the parts listed in Table 1 to paragraph (f) of this AD before exceeding the new life limit indicated: Table 1 to Paragraph ( f )—Reduced Part Lives Part nomenclature Part No. Life in standard duty cycles Life in cycles using the HEAVY profile Intermediate Pressure (IP) Compressor Rotor Shaft FK24100 12,500 11,500 IP Compressor Rotor Shaft FK24496 8,860 8,180 High-Pressure Compressor (HPC) Stage 1 to 4 Rotor Discs Shaft FK24009 4,560 4,460 HPC Stage 1 to 4 Rotor Discs Shaft FK26167 5,580 5,280 HPC Stage 1 to 4 Rotor Discs Shaft FK32580 5,580 5,280 HPC Stage 1 to 4 Rotor Discs Shaft FW11590 8,550 6,850 HPC Stage 1 to 4 Rotor Discs Shaft FW61622 8,550 6,850 HPC Stage 5 and 6 Discs and Cone FK25230 5,000 5,000 HPC Stage 5 and 6 Discs and Cone FK27899 5,000 5,000 IP Turbine Rotor Disc FK21117 11,610 10,400 IP Turbine Rotor Disc FK33083 0 0 (2) Reserved.
Required actions
After the effective date of this AD, do not install any IP turbine discs, P/N FK33083, into any engine.
Unsafe condition
This AD was prompted by RR revising the life limits of certain critical engine rotating parts. We are issuing this AD to prevent the failure of critical engine rotating parts, damage to the engine, and damage to the airplane.
Affected ADs
This AD replaces AD 2012-04-01, Amendment 39-16956 (77 FR 10355, February 22, 2012).
Read the original on the Federal Register →
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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