Airworthiness Directive · Amendment 39-19195 · Turbine section
GE Aviation Czech s.r.o. Turboprop Engines
Superseded. A later AD replaced this one: AD 2020-15-03. Comply with the one in force.
This AD applies to GE Aviation Czech s.r.o. M601D-11, M601E-11, M601E-11A, M601E-11AS, M601E-11S, and M601F turboprop engines, with power turbine (PT) rotors with disks, part number (P/N) M601-3220.6 or P/N M601-3220.7, installed.
We are adopting a new airworthiness directive (AD) for GE Aviation Czech s.r.o. M601D-11, M601E-11, M601E-11A, M601E-11AS, M601E- 11S, and M601F turboprop engines. This AD requires removal of certain power turbine (PT) disks installed on the affected engines. This AD was prompted by a design review by the manufacturer that determined PT rotors with certain disks have less overspeed margin than originally stated during product certification. We are issuing this AD to address the unsafe condition on these products.
After the effective date of this AD, remove the affected PT disk from service during the next engine overhaul or rebuild, or within 5 years, whichever occurs first.
After the effective date of this AD, do not install an affected PT disk on any engine.
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.
