AD 90-17-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | 400 | Airworthiness Directives; BRANSON AIRCRAFT Beech Model 400, Mitsubishi Models MU-300-10 and MU-300 Airplanes |
| aircraft | Textron Aviation Inc. | MU-300 | Airworthiness Directives; BRANSON AIRCRAFT Beech Model 400, Mitsubishi Models MU-300-10 and MU-300 Airplanes |
| aircraft | Textron Aviation Inc. | MU-300-10 | Airworthiness Directives; BRANSON AIRCRAFT Beech Model 400, Mitsubishi Models MU-300-10 and MU-300 Airplanes |
Unsafe Condition
Release of liquid and vaporous fuel into the cabin, and possible subsequent explosion and/or fire in the cabin.
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Required Actions
Accomplish either Procedure 1 or 2. Procedure 1 requires modifying the AFM, defueling and draining the fuselage tanks, electrical system checks, installing placards, and collaring circuit breakers. Procedure 2 involves modifying fuel tank components, installing explosion suppression foam, and removing previous modifications if Procedure 1 was done.
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Compliance Time
within 30 days after the effective date of this AD, unless previously accomplished
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Affected Aircraft
Beech Model 400 (Serial Numbers RJ-1 through RJ-50, RJ-52 through RJ-65 with Branson STC SA2744NM), Mitsubishi Model MU-300-10 (Serial Numbers A1001S.A. through A1011S.A. with STC SA2744NM), and Mitsubishi Model MU-300 (Serial Numbers A001S.A. through A091S.A. with STC SA1596NM).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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