AD 77-04-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Twin Commander Aircraft LLC | 690A | Airworthiness Directives; Rockwell International Corporation, General Aviation Division Model 690A Airplanes |
Unsafe Condition
Failure of the manual-electric elevator trim system could generate excessive 'g' forces due to system malfunction.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Check airplane records to determine if the manual-electric elevator trim system has been modified per Part II of Service Bulletin No. 162 or equivalent. If not modified, deactivate the trim system per Part I of the same service bulletin. Reactivation requires prior accomplishment of Part II or equivalent.
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Compliance Time
within the next 25 hours' time in service after the effective date of this AD
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Affected Aircraft
Rockwell International Corporation, General Aviation Division Model 690A airplanes, Serial Numbers 11143 through 11344, equipped with a Rockwell International installed Collins Radio Company AP106 autopilot (excluding installations per STC SA1876SW)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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