AD 79-01-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | 100 | Beech Models F33A, F33C, G33, 35-C33, 35-C33A, 35-B33, V35B, A36, D55, D55A, E55, E55A, 56TC, 58, 58A, 58P, 58PA, 58TC, 58TCA, 65-B80, 70, B90, C90, E90, 95-A55, 95-B55, 95-B55A, 95-C55, 95-C55A, 99, 99A, A99A, B99, 100, A100, B100, 200, 200T Airplanes |
| aircraft | Textron Aviation Inc. | 200 | Beech Models F33A, F33C, G33, 35-C33, 35-C33A, 35-B33, V35B, A36, D55, D55A, E55, E55A, 56TC, 58, 58A, 58P, 58PA, 58TC, 58TCA, 65-B80, 70, B90, C90, E90, 95-A55, 95-B55, 95-B55A, 95-C55, 95-C55A, 99, 99A, A99A, B99, 100, A100, B100, 200, 200T Airplanes |
| aircraft | Textron Aviation Inc. | 35-B33 | Beech Models F33A, F33C, G33, 35-C33, 35-C33A, 35-B33, V35B, A36, D55, D55A, E55, E55A, 56TC, 58, 58A, 58P, 58PA, 58TC, 58TCA, 65-B80, 70, B90, C90, E90, 95-A55, 95-B55, 95-B55A, 95-C55, 95-C55A, 99, 99A, A99A, B99, 100, A100, B100, 200, 200T Airplanes |
| aircraft | Textron Aviation Inc. | 35-C33 | Beech Models F33A, F33C, G33, 35-C33, 35-C33A, 35-B33, V35B, A36, D55, D55A, E55, E55A, 56TC, 58, 58A, 58P, 58PA, 58TC, 58TCA, 65-B80, 70, B90, C90, E90, 95-A55, 95-B55, 95-B55A, 95-C55, 95-C55A, 99, 99A, A99A, B99, 100, A100, B100, 200, 200T Airplanes |
| aircraft | Textron Aviation Inc. | 35-C33A | Beech Models F33A, F33C, G33, 35-C33, 35-C33A, 35-B33, V35B, A36, D55, D55A, E55, E55A, 56TC, 58, 58A, 58P, 58PA, 58TC, 58TCA, 65-B80, 70, B90, C90, E90, 95-A55, 95-B55, 95-B55A, 95-C55, 95-C55A, 99, 99A, A99A, B99, 100, A100, B100, 200, 200T Airplanes |
| aircraft | Textron Aviation Inc. | 56TC | Beech Models F33A, F33C, G33, 35-C33, 35-C33A, 35-B33, V35B, A36, D55, D55A, E55, E55A, 56TC, 58, 58A, 58P, 58PA, 58TC, 58TCA, 65-B80, 70, B90, C90, E90, 95-A55, 95-B55, 95-B55A, 95-C55, 95-C55A, 99, 99A, A99A, B99, 100, A100, B100, 200, 200T Airplanes |
| aircraft | Textron Aviation Inc. | 58 | Beech Models F33A, F33C, G33, 35-C33, 35-C33A, 35-B33, V35B, A36, D55, D55A, E55, E55A, 56TC, 58, 58A, 58P, 58PA, 58TC, 58TCA, 65-B80, 70, B90, C90, E90, 95-A55, 95-B55, 95-B55A, 95-C55, 95-C55A, 99, 99A, A99A, B99, 100, A100, B100, 200, 200T Airplanes |
| aircraft | Textron Aviation Inc. | 58A | Beech Models F33A, F33C, G33, 35-C33, 35-C33A, 35-B33, V35B, A36, D55, D55A, E55, E55A, 56TC, 58, 58A, 58P, 58PA, 58TC, 58TCA, 65-B80, 70, B90, C90, E90, 95-A55, 95-B55, 95-B55A, 95-C55, 95-C55A, 99, 99A, A99A, B99, 100, A100, B100, 200, 200T Airplanes |
| aircraft | Textron Aviation Inc. | 58P | Beech Models F33A, F33C, G33, 35-C33, 35-C33A, 35-B33, V35B, A36, D55, D55A, E55, E55A, 56TC, 58, 58A, 58P, 58PA, 58TC, 58TCA, 65-B80, 70, B90, C90, E90, 95-A55, 95-B55, 95-B55A, 95-C55, 95-C55A, 99, 99A, A99A, B99, 100, A100, B100, 200, 200T Airplanes |
| aircraft | Textron Aviation Inc. | 58PA | Beech Models F33A, F33C, G33, 35-C33, 35-C33A, 35-B33, V35B, A36, D55, D55A, E55, E55A, 56TC, 58, 58A, 58P, 58PA, 58TC, 58TCA, 65-B80, 70, B90, C90, E90, 95-A55, 95-B55, 95-B55A, 95-C55, 95-C55A, 99, 99A, A99A, B99, 100, A100, B100, 200, 200T Airplanes |
Unsafe Condition
Certain screws in the airplane control system may lack required structural integrity due to insufficient raised or depressed 'X' marks on their heads, indicating potential failure of the screws at their specified locations.
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Required Actions
Within 100 hours time-in-service after the effective date, inspect screws at specified locations per Item Numbers in Table I. Replace screws unless existing screws have at least one 'X' mark. Replace screws one at a time to maintain bracket alignment. Equivalent compliance requires FAA approval.
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Compliance Time
Within 100 hours time-in-service after the effective date of this AD
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Affected Aircraft
Beech models F33A, F33C, G33, 35-C33, 35-C33A, 35-B33, V35B, A36, D55, D55A, E55, E55A, 56TC, 58, 58A, 58P, 58PA, 58TC, 58TCA, 65-B80, 70, B90, C90, E90, 95-A55, 95-B55, 95-B55A, 95-C55, 95-C55A, 99, 99A, A99A, B99, 100, A100, B100, 200, 200T with specific serial numbers as listed in the AD's table (excluding those already compliant with AD 74-13-02).
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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