AD 61-21-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | 188A | LOCKHEED All Model 188 Aircraft |
| aircraft | Lockheed Martin Corporation | 188C | LOCKHEED All Model 188 Aircraft |
Unsafe Condition
Inadvertent tripping of compass circuit breakers due to bumping the ganging bar by the observer seat occupant, leading to loss of heading information.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect pilot's and copilot's compass circuit breakers. If ganged, remove ganging bars or install protective guard preventing inadvertent operation of the ganging bar.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 100 hours' time in service after the effective date of this AD
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Affected Aircraft
Lockheed Martin Corporation Model 188A and 188C aircraft
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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