AD 85-01-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | 100 | Airworthiness Directives; Beech Models 65-88, 65-90, 65-A90, B90, C90, E90, 100, A100, and B100 Aircraft |
| aircraft | Textron Aviation Inc. | 65-88 | Airworthiness Directives; Beech Models 65-88, 65-90, 65-A90, B90, C90, E90, 100, A100, and B100 Aircraft |
| aircraft | Textron Aviation Inc. | 65-90 | Airworthiness Directives; Beech Models 65-88, 65-90, 65-A90, B90, C90, E90, 100, A100, and B100 Aircraft |
| aircraft | Textron Aviation Inc. | 65-A90 | Airworthiness Directives; Beech Models 65-88, 65-90, 65-A90, B90, C90, E90, 100, A100, and B100 Aircraft |
| aircraft | Textron Aviation Inc. | A100 | Airworthiness Directives; Beech Models 65-88, 65-90, 65-A90, B90, C90, E90, 100, A100, and B100 Aircraft |
| aircraft | Textron Aviation Inc. | B90 | Airworthiness Directives; Beech Models 65-88, 65-90, 65-A90, B90, C90, E90, 100, A100, and B100 Aircraft |
| aircraft | Textron Aviation Inc. | C90 | Airworthiness Directives; Beech Models 65-88, 65-90, 65-A90, B90, C90, E90, 100, A100, and B100 Aircraft |
Unsafe Condition
Failures of cast acrylic windows could result in decompression and possible occupant injury.
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Required Actions
Within 50 hours time-in-service after the effective date or 300 hours TIS after the last inspection per AD 81-12-01, whichever is later, and every 300 hours TIS thereafter, visually inspect each cast acrylic window per Beech SB 2011. Replace any window with cracks, fissures, stress crazes, or scratches with stretched acrylic windows of specified part numbers within one calendar year after the effective date. Alternatively, deactivate the pressurization system by securing the 'Test/Dump' switch, installing a placard, updating the flight manual, and recording compliance.
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Compliance Time
Within 50 hours time-in-service after the effective date or 300 hours TIS after the last inspection per AD 81-12-01 whichever occurs later, and each 300 hours TIS thereafter, and within 50 hours TIS after any stripping and repainting in the area of the window
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Affected Aircraft
Beech Models 65-88 (S/Ns LP-1 through LP-26, LP-28, and LP-30 through LP-47); 65-90, 65-A90, B90, and C90 (S/Ns LJ-1 through LJ-680); E90 (S/Ns LW-1 through LW-178); 100 and A100 (S/Ns B-1 through B-226); and B100 (S/Ns BE-1 through BE-8)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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