Airworthiness directives › 2010-25-05
AD 2010-25-05 Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Models BR700-710A1-10; BR700-710A2-20; and BR700-710C4-11 Turbofan Engines
Applicability*9
This AD applies to Rolls-Royce Deutschland Ltd & Co KG models BR700-710A1-10, BR700-710A2-20, and BR700-710C4-11 turbofan engines with any of the high-pressure turbine (HPT) stage 1 and stage 2 discs installed as listed by part number (P/N) in Table 1 and Table 2 of this AD. These engines are installed on, but not limited to, Gulfstream model G-V and GV-SP airplanes, and Bombardier model BD-700-1A10 and BD-700-1A11 airplanes. Table 1—Declared Safe Cyclic Life of Affected HPT Stage 1 Discs HPT stage 1 disc P/N Engine model Declared safe cyclic life (flight cycles) BRR21215 BR700-710A1-10 6,075 BRR21215 BR700-710A2-20 5,950 BRR22005 BR700-710A1-10 6,200 BRR22005 BR700-710A2-20 6,200 BRR22006 BR700-710A1-10 6,200 BRR22006 BR700-710A2-20 6,200 BRR22007 BR700-710A1-10 6,200 BRR22007 BR700-710A2-20 6,200 BRR22358 BR700-710A1-10 6,200 BRR22358 BR700-710A2-20 6,200 BRR23864 BR700-710A1-10 6,200 BRR23864 BR700-710A2-20 6,200 BRR23884 BR700-710A1-10 6,200 BRR23884 BR700-710A2-20 6,200 BRR23885 BR700-710A1-10 6,200 BRR23885 BR700-710A2-20 6,200 BRR23952 BR700-710A1-10 6,200 BRR23952 BR700-710A2-20 6,200 BRR23952 BR700-710C4-11 (Service Bulletin (SB) No. SB-BR700-72-101466 not incorporated) 6,200 BRR23952 BR700-710C4-11 (SB No. SB-BR700-72-101466 incorporated) 3,800 BRR23953 BR700-710A1-10 6,200 BRR23953 BR700-710A2-20 6,200 BRR23953 BR700-710C4-11 (SB No. SB-BR700-72-101466 not incorporated) 6,200 BRR23953 BR700-710C4-11 (SB No. SB-BR700-72-101466 incorporated) 3,800 BRR23954 BR700-710A1-10 6,200 BRR23954 BR700-710A2-20 6,200 Table 2—Declared Safe Cyclic Life of Affected HPT Stage 2 Discs HPT stage 2 disc P/N Engine model Declared safe cyclic life (flight cycles) BRR18291 BR700-710A1-10 9,300 BRR21214 BR700-710A1-10 9,600 BRR21214 BR700-710A2-20 9,600 BRR22008 BR700-710A1-10 10,500 BRR22008 BR700-710A2-20 10,500 BRR22008 BR700-710C4-11 (SB No. SB-BR700-72-101466 not incorporated) 10,500 BRR22008 BR700-710C4-11 (SB No. SB-BR700-72-101466 incorporated) 3,700 BRR22009 BR700-710A1-10 10,500 BRR22009 BR700-710A2-20 10,500 BRR22009 BR700-710C4-11 (SB No. SB-BR700-72-101466 not incorporated) 10,500 BRR22009 BR700-710C4-11 (SB No. SB-BR700-72-101466 incorporated) 3,700 BRR22010 BR700-710A1-10 10,500 BRR22010 BR700-710A2-20 10,500 BRR22359 BR700-710A1-10 10,500 BRR22359 BR700-710A2-20 10,500 Reason (d) This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI states: Due to manufacturing problems of BR700-710 HP stage 1 and 2 turbine discs it was necessary to re-calculate the Declared Safe Cyclic Life (DSCL) for all BR700-710 HP turbine discs. The analysis concluded that it is required to reduce the approved life limits for the HP turbine disc part numbers that are listed in Table 1 and Table 2 of this AD (MCAI). Exceeding the revised approved life limits could potentially result in non-contained disc failure. We are issuing this AD to prevent failure of the HPT stage 1 and stage 2 discs, uncontained engine failure, and damage to the airplane.
Compliance
Unless already done, do the following actions. (1) Within 30 days after the effective date of this AD, or upon accumulating the declared safe cyclic life indicated in Table 1 or Table 2 of this AD as applicable, whichever occurs later, initially replace the HPT stage 1 or HPT stage 2 discs with serviceable discs. (2) Thereafter, upon accumulating the declared safe cyclic life indicated in Table 1 or Table 2 of this AD, as applicable, repetitively replace the HPT stage 1 or HPT stage 2 discs with serviceable discs. FAA AD Differences (f) None. Alternative Methods of Compliance (AMOCs) (g) 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 (h) Refer to European Aviation Safety Agency AD 2010-0075, dated April 20, 2010, and AD 2010-0076, dated April 20, 2010, for related information. (i) Refer to Rolls-Royce Deutschland Ltd & Co KG SB No. SB-BR700-72-A900492, dated February 12, 2010, and SB No. SB-BR700-72-A900497, dated February 12, 2010, for related information. Contact Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, Dahlewitz, 15827 Blankenfelde-Mahlow, Germany, telephone: +49 (0) 33-7086-1883, fax: +49 (0) 33-7086-3276, for a copy of this service information. (j) Contact Mark Riley, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: mark.riley@faa.gov; telephone (781) 238-7758; fax (781) 238-7199, for more information about this AD. Issued in Burlington, Massachusetts, on November 30, 2010. Peter A. White, Assistant Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 2010-30832 Filed 12-8-10; 8:45 am] BILLING CODE 4910-13-P
Required actions
Unless already done, do the following actions. (1) Within 30 days after the effective date of this AD, or upon accumulating the declared safe cyclic life indicated in Table 1 or Table 2 of this AD as applicable, whichever occurs later, initially replace the HPT stage 1 or HPT stage 2 discs with serviceable discs. (2) Thereafter, upon accumulating the declared safe cyclic life indicated in Table 1 or Table 2 of this AD, as applicable, repetitively replace the HPT stage 1 or HPT stage 2 discs with serviceable discs. FAA AD Differences (f) None. Alternative Methods of Compliance (AMOCs) (g) 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 (h) Refer to European Aviation Safety Agency AD 2010-0075, dated April 20, 2010, and AD 2010-0076, dated April 20, 2010, for related information. (i) Refer to Rolls-Royce Deutschland Ltd & Co KG SB No. SB-BR700-72-A900492, dated February 12, 2010, and SB No. SB-BR700-72-A900497, dated February 12, 2010, for related information. Contact Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, Dahlewitz, 15827 Blankenfelde-Mahlow, Germany, telephone: +49 (0) 33-7086-1883, fax: +49 (0) 33-7086-3276, for a copy of this service information. (j) Contact Mark Riley, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: mark.riley@faa.gov; telephone (781) 238-7758; fax (781) 238-7199, for more information about this AD. Issued in Burlington, Massachusetts, on November 30, 2010. Peter A. White, Assistant Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 2010-30832 Filed 12-8-10; 8:45 am] BILLING CODE 4910-13-P
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