AD 2021-20-21
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | WALTER Engines a.s. | Various | Airworthiness Directives; GE Aviation Czech s.r.o. (Type Certificate Previously Held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s.) Turboprop Engines |
| aircraft | Aviat | Various | Airworthiness Directives; GE Aviation Czech s.r.o. (Type Certificate Previously Held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s.) Turboprop Engines |
Unsafe Condition
The engine push-pull control settings may be inadvertently changed after certain maintenance, repair, or modification action, which could lead to reduced control or loss of control of the aeroplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect and adjust the engine push-pull control, replace the beta switch with an improved part, inspect and adjust the engine push-pull control after any maintenance, repair or modification action that affects the push-pull control, and install an improved push-pull control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
GE Aviation Czech s.r.o. (Type Certificate Previously Held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s.) H80-200 and H85-200 model turboprop engines with Avia Propeller AV-725 propellers 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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.