Airworthiness Directive · Amendment 39-18200 · GE Aviation Czech s.r.o. Turboprop Engines
GE Aviation Czech s.r.o. Turboprop Engines
This AD applies to GE Aviation Czech s.r.o. M601E-11, M601E-11A, and M601F turboprop engines with the following serial numbers (S/Ns):
(1) Model M601E-11: S/Ns 833244, 841289, 852239, 861007, 881217, 884021, 892046, 892219, 894018, 903028, 913038, and 912023.
(2) Model M601E-11A: S/Ns 902004 and 883046.
(3) Model M601F: S/Ns 912001 and 924002.
We are adopting a new airworthiness directive (AD) for certain serial number GE Aviation Czech s.r.o. M601E-11, M601E-11A, and M601F turboprop engines. This AD requires inspection of the reduction gearbox and supporting cone. This AD was prompted by the determination that wear or cracking, and subsequent misalignment of the quill shaft of the engine and the power turbine (PT) shaft, may lead to rupture of the quill shaft, overspeed of the PT, and uncontained engine failure. We are issuing this AD to prevent misalignment and rupture of the quill shaft, which could lead to overspeed of the PT, uncontained engine failure, and damage to the airplane.
(1) Within 300 flight hours, or six months after the effective date of this AD, whichever occurs first, inspect the reduction gearbox and supporting cone. Use GE Aviation Czech s.r.o. Alert Service Bulletins (ASBs) No. M601E-11/28, M601E-11A/15, and M601F/26, all Revision 2, all dated January 23, 2015, including Appendix 2, paragraph 4., Inspection, (the issue date is not specified in the appendix), as applicable, to do the inspection.
(2) If any crack is detected on the quill shaft, PT shaft, or the supporting cone, or if the quill shaft or PT shaft involute spline wear exceeds 0.12 mm, then before further flight, replace each cracked or worn part with a part eligible for installation.
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
