Airworthiness Directive · Amendment 39-12446 · Rolls-Royce plc Dart 525, 525F, 528, 528D, 529, 529D, 530, 532, 535, 542, and 552 Series Turboprop Engines
Rolls-Royce plc Dart 525, 525F, 528, 528D, 529, 529D, 530, 532, 535, 542, and 552 Series Turboprop Engines
This airworthiness directive (AD) is applicable to Rolls-Royce Dart 525, 525F, 528-7E, 528D-7E, 529-7E, 529D-7E, 529-7H, 529D-7H, 529-8E, 529D-8E, 529-8H, 529D-8H, 529-8X, 529D-8X, 529-8Y, 529D-8Y, 529-8Z, 529D-8Z, 530, 532-7, 532-7L, 532-7N, 532-7P, 532-7R, 535-2, 535-7R, 542-10, 542-10J, 542-10K, 542-4, 542-4K, 552-2, 552-7, 552- 7R series turbofan engines that contain high pressure turbine (HPT) discs having the part numbers listed in the following Table 1: Table 1.--Part Numbers of Applicable HPT Discs ARK49431 ARK49434 ARK49437 A.RK50111 A.RK50120 A.RK50121 BRK49431 BRK49434 BRK49437 B.RK50111 B.RK50120 B.RK50121 CRK49431 CRK49434 CRK49437 C.RK50111 C.RK50120 C.RK50121 RK33092 RK33097 RK33099 RK33104 RK33114 RK33117 RK33119 RK33122 RK33125 RK33130 RK33131 RK33214 RK33466 RK33499 RK34206 RK34207 RK34208 RK34209 RK34210 RK34211 RK34212 RK34213 RK34671 RK34674 RK36477 RK36479 RK36481 RK36483 RK36485 RK36487 RK36489 RK36491 RK38592 RK38593 RK38594 RK38595 RK40712 RK40713 RK40714 RK40715 RK40716 RK40717 RK40718 RK40719 RK40720 RK40721 RK40722 RK40723 RK40724 RK40725 RK40726 RK40727 RK43749 RK43750 RK43751 RK44112 RK44113 RK44114 RK44115 RK44116 RK44117 RK44118 RK44119 RK44120 RK44121 RK44122 RK44123 RK44124 RK44125 RK44126 RK44127 RK44310 RK44311 RK44312 RK44328 RK44342 RK44374 RK44397 RK45565 RK46136 RK46485 RK46486 RK46487 RK46488 RK46489 RK46490 RK46491 RK46492 RK46493 RK46494 RK46495 RK46496 RK46497 RK46498 RK46499 RK46531 RK46828 RK48339 RK49121 RK49209 RK49210 RK49211 RK49431 RK49434 RK49437 RK50111 RK50120 RK50121 These engines are installed on, but not limited to BAC Viscount Type 810 aircraft, Fokker F.27 Friendship Mark 200, 400, 500, and 600 series aircraft, Maryland Air Industries, Inc. Fairchild F-27A, F, G, M, J, FH-227, FH-227B, C, D, and E series aircraft, Gulfstream Aerospace Model G-159 aircraft, BAE SYSTEMS (Operations) Limited HS 748 series aircraft, Mitsubishi Heavy Industries, Ltd. YS-11 series aircraft, and Convair CV600/640 series aircraft.
This amendment adopts a new airworthiness directive (AD) that is applicable to Rolls-Royce plc (RR) Dart 525, 525F, 528, 528D, 529, 529D, 530, 532, 535, 542, and 552 series turboprop engines. This action requires the removal of certain part number (P/N) high pressure turbine (HPT) discs and replacement with serviceable discs. This amendment is prompted by three reports of uncontained HPT disc failures and the manufacturer's investigation into disc failure. The actions specified in this AD are intended to prevent HPT disc failure, which could result in an uncontained engine failure and damage to the airplane.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Engines
