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Airworthiness directives › 2012-04-13

AD 2012-04-13 Airworthiness Directives; Rolls-Royce plc (RR) Turbofan Engines

Superseded. This directive was replaced by AD 2013-19-21. Work to the current one.
2012-04-11
2012-03-07
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Engine
2013-19-21

Applicability*9

This AD applies to Rolls-Royce plc (RR) model RB211-524G2-T-19, -524G3-T-19, -524H-T-36, and -524H2-T-19; and RB211-Trent 553-61, 553A2-61, 556-61, 556A2-61, 556B-61 556B2-61, 560-61, 560A2-61; RB211-Trent 768-60, 772-60, 772B-60; and RB211-Trent 875-17, 877-17, 884-17, 884B-17, 892-17, 892B-17, and 895-17 turbofan engines that have a high-pressure (HP) compressor stage 1 to 4 rotor disc with a part number (P/N) listed in Table 1 of this AD. Table 1—Affected HP Compressor Stage 1 to 4 Rotor Disc P/Ns by Engine Model Engine model HP compressor stage 1 to 4 rotor disc P/N (1) RB211-524G2-T-19, -524G3-T-19, -524H-T-36, and -524H2-T-19 FW20195, FK25502, or FW23711. (2) RB211 Trent 553-61, 553A2-61, 556-61, 556A2-61, 556B-61, 556B2-61, 560-61, and 560A2-61 FK30524. (3) RB211 Trent 768-60, 772-60, and 772B-60 FK22745, FK24031, FK26185, FK23313, FK25502, FK32129, FW20195, FW20196, FW20197, FW20638, or FW23711. (4) RB211 Trent 875-17, 877-17, 884-17, 884B-17, 892-17, 892B-17, and 895-17 FK24009, FK26167, FK32580, FW11590, or FW61622.

Compliance

(1) Clean and perform a fluorescent penetrant inspection of the HP compressor stage 1 to 4 rotor discs at the first shop visit after accumulating 1,000 cycles since new on the stage 1 to 4 rotor discs or at the next shop visit after the effective date of this AD, which ever occurs later. (2) Use paragraph 3.A through 3.E.(11) of the Accomplishment Instructions of Rolls-Royce Alert Service Bulletin (ASB) No. RB.211-72-AF964, Revision 2, dated June 8, 2011, to do the inspections. (3) Thereafter at every engine shop visit, perform the inspection specified by paragraph (f) of this AD.

Required actions

For the purpose of this AD, an “engine shop visit” is whenever all compressor blades are removed from the HP compressor drum.

Unsafe condition

Comply with this AD within the compliance times specified, unless already done.

Affected ADs

This AD supersedes AD 2011-09-07, Amendment 39-16669 (76 FR 24793, May 3, 2011).

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