AD 2011-12-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking | Various | Airworthiness Directives; Viking Air Limited Model DHC-3 (Otter) Airplanes With Supplemental Type Certificate (STC) SA 09866SC |
| engine | Honeywell | TPE331- 10 or -12JR | Airworthiness Directives; Viking Air Limited Model DHC-3 (Otter) Airplanes With Supplemental Type Certificate (STC) SA 09866SC |
Unsafe Condition
Airspeed limitations for the affected airplanes are not adjusted for the installation of a turboprop engine, which could result in reduced safety margins and cause an unsafe condition.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Incorporate revised airspeed limitations and mark the airspeed indicator accordingly. Install a temporary placard on the instrument panel next to the airspeed indicator within the pilot's clear view.
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
Viking Air Limited Model DHC-3 (Otter) airplanes equipped with a Honeywell TPE331-10 or -12JR turboprop engine installed per Supplemental Type Certificate (STC) SA09866SC.
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.