AD 91-20-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | A36 | Airworthiness Directives: Beech Models F33A, F33C, V35B, A36, A36TC and B36TC Airplanes |
| aircraft | Textron Aviation Inc. | A36TC | Airworthiness Directives: Beech Models F33A, F33C, V35B, A36, A36TC and B36TC Airplanes |
| aircraft | Textron Aviation Inc. | B36TC | Airworthiness Directives: Beech Models F33A, F33C, V35B, A36, A36TC and B36TC Airplanes |
| aircraft | Textron Aviation Inc. | F33A | Airworthiness Directives: Beech Models F33A, F33C, V35B, A36, A36TC and B36TC Airplanes |
| aircraft | Textron Aviation Inc. | F33C | Airworthiness Directives: Beech Models F33A, F33C, V35B, A36, A36TC and B36TC Airplanes |
| aircraft | Textron Aviation Inc. | V35B | Airworthiness Directives: Beech Models F33A, F33C, V35B, A36, A36TC and B36TC Airplanes |
Unsafe Condition
Fresh air blower housing failure, which could lead to blower impingement on the flight control cables located below the blower and possible loss of control of the airplane.
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Required Actions
Inspect and modify as required the attachment of the fresh air blower housing in accordance with Beech Service Bulletin No. 2380, revised April 1991. Special flight permits may be issued to operate airplanes to a location where the requirements can be accomplished. Alternative methods of compliance or adjustments to the compliance time may be approved by the FAA.
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Compliance Time
within the next 50 hours time-in-service after the effective date of this AD, unless already accomplished
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Affected Aircraft
Beech Models F33A (CE-941 through CE-1555), F33C (CJ-156 through CJ-179), V35B (D-10348, D-10364 through D-10403), A36 (E-1809 through E-2592), and A36TC and B36TC (EA-192 through EA-514)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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