AD 93-20-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | 400A | BEECH AIRCRAFT CORPORATION Model 400A and 400T Airplanes |
| aircraft | Textron Aviation Inc. | 400T | BEECH AIRCRAFT CORPORATION Model 400A and 400T Airplanes |
Unsafe Condition
Improper installation of the engine electronic fuel control (EFC) start circuit wiring, improper positioning of the end terminals on wire P147D6, and absence of a non-conductive sheet on the sidewall upholstery could lead to smoke and/or fire in the cockpit.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 25 hours time-in-service after the effective date, inspect EFC start circuit wiring per SB 2520; install non-conductive sheet part 132-530027-13 per SB 2520; inspect wire P147D6 terminals per Communique 400-101. If wiring is improper, modify prior to flight; if terminals are mispositioned, reposition prior to flight; replace missing moisture shields at next maintenance.
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Compliance Time
Within 25 hours time-in-service after the effective date of this AD
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Affected Aircraft
Beech Aircraft Corporation Model 400A (serials RK-45, RK-49 through RK-77, RK-79) and Model 400T (serials TT-01 through TT-42, TT-44)
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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