Airworthiness directives › 2009-04-13
AD 2009-04-13 Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG, BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 Turbofan Engines
Applicability*9
This AD applies to Rolls-Royce Deutschland Ltd & Co KG (RRD), BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 turbofan engines, with a low pressure (LP) compressor (fan) disc assembly, part number (P/N) BRH10048 or P/N BRH19253. These engines are installed on, but not limited to, McDonnell Douglas Corporation model 717-200 airplanes. Reason (d) The mandatory continuous airworthiness information (MCAI) states: The application of most recent 3D FEM modeling has resulted in the need to reconsider the disc lives as currently shown in the Time Limits Manual. The current Post Certification Life Statement for the low pressure (LP) compressor (fan) disc assembly revises the Declared Safe Cyclic Life (DSCL) from 33,000 flight cycles to 25,000 flight cycles for both the BR715 LP (fan) disc assembly P/N BRH10048 and BR715 LP compressor (fan) disc assembly P/N BRH19253, when installed in the BR700-715A1-30 engine model and operated against the Hawaiian Flight Mission. This condition, if not corrected, could result in uncontained failure of the LP compressor (fan) disc assembly and damage to the airplane.
Compliance
Within 25 flight cycles after the effective date of this AD, do the following actions, unless already done. (1) Amend the Airworthiness Limitations Section (ALS) of the Time Limits Manual SUBTASK 05-10-01-860-016, by revising the “GIVEN LIFE A1-30 RATING (FLIGHT CYCLES)” for both the LP compressor (fan) disc assembly P/N BRH10048 and LP compressor (fan) disc assembly P/N BRH19253 from 33,000 flight cycles to 25,000 flight cycles. (2) Check the lifing of both the LP compressor (fan) disc assembly P/N BRH10048 and LP compressor (fan) disc assembly P/N BRH19253 if the relevant compressor (fan) disc assembly is currently installed or was previously installed, in the BR700-715A1-30 engine model and operated under the Hawaiian Flight Mission. (3) Remove the relevant compressor (fan) disc assembly from service before further flight, if the consumed life has exceeded the maximum approved life specified in the ALS. Alternative Methods of Compliance (AMOC) (f) The Manager, Engine Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Related Information (g) Refer to MCAI European Aviation Safety Agency AD 2007-0116-E, dated May 4, 2007, for related information. (h) Contact Jason Yang, Aerospace Engineer, Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: Jason.yang@faa.gov; telephone (781) 238-7747; fax (781) 238-7199, for more information about this AD. Issued in Burlington, Massachusetts, on February 10, 2009. Peter A. White, Assistant Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. E9-3355 Filed 2-18-09; 8:45 am] BILLING CODE 4910-13-P
Required actions
Within 25 flight cycles after the effective date of this AD, do the following actions, unless already done. (1) Amend the Airworthiness Limitations Section (ALS) of the Time Limits Manual SUBTASK 05-10-01-860-016, by revising the “GIVEN LIFE A1-30 RATING (FLIGHT CYCLES)” for both the LP compressor (fan) disc assembly P/N BRH10048 and LP compressor (fan) disc assembly P/N BRH19253 from 33,000 flight cycles to 25,000 flight cycles. (2) Check the lifing of both the LP compressor (fan) disc assembly P/N BRH10048 and LP compressor (fan) disc assembly P/N BRH19253 if the relevant compressor (fan) disc assembly is currently installed or was previously installed, in the BR700-715A1-30 engine model and operated under the Hawaiian Flight Mission. (3) Remove the relevant compressor (fan) disc assembly from service before further flight, if the consumed life has exceeded the maximum approved life specified in the ALS. Alternative Methods of Compliance (AMOC) (f) The Manager, Engine Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Related Information (g) Refer to MCAI European Aviation Safety Agency AD 2007-0116-E, dated May 4, 2007, for related information. (h) Contact Jason Yang, Aerospace Engineer, Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: Jason.yang@faa.gov; telephone (781) 238-7747; fax (781) 238-7199, for more information about this AD. Issued in Burlington, Massachusetts, on February 10, 2009. Peter A. White, Assistant Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. E9-3355 Filed 2-18-09; 8:45 am] BILLING CODE 4910-13-P
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