Airworthiness directives › 2018-03-22
AD 2018-03-22 Airworthiness Directives; GE Aviation Czech s.r.o. Turboprop Engines
Applicability*9
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.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
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.
Unsafe condition
This AD was prompted by a review by the manufacturer that determined that PT rotors with disks, P/N M601-3220.6 or P/N M601-3220.7, have less overspeed margin than originally declared during product certification. We are issuing this AD to prevent failure of the PT rotor. The unsafe condition, if not addressed, could result in failure of the PT rotor, uncontained release of the PT disk, damage to the engine, and damage to the airplane.
Affected ADs
None.
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