AD 2018-03-22
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; GE Aviation Czech s.r.o. Turboprop Engines |
Unsafe Condition
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.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the affected PT disk from service during the next engine overhaul or rebuild, or within 5 years, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 5 years after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
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.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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