AD 88-04-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | 100 | Airworthiness Directives; Beech Model 65, A65, A65-8200, 70, 65-80, 65-A80, 65-A80-8800, 65-B80, 65-88, 65-90, 65-A90, B90, C90, E90, 99, 99A, A99A, B99, 100, A100 and B100 Airplanes |
| aircraft | Textron Aviation Inc. | 65 | Airworthiness Directives; Beech Model 65, A65, A65-8200, 70, 65-80, 65-A80, 65-A80-8800, 65-B80, 65-88, 65-90, 65-A90, B90, C90, E90, 99, 99A, A99A, B99, 100, A100 and B100 Airplanes |
| aircraft | Textron Aviation Inc. | 65-80 | Airworthiness Directives; Beech Model 65, A65, A65-8200, 70, 65-80, 65-A80, 65-A80-8800, 65-B80, 65-88, 65-90, 65-A90, B90, C90, E90, 99, 99A, A99A, B99, 100, A100 and B100 Airplanes |
| aircraft | Textron Aviation Inc. | 65-88 | Airworthiness Directives; Beech Model 65, A65, A65-8200, 70, 65-80, 65-A80, 65-A80-8800, 65-B80, 65-88, 65-90, 65-A90, B90, C90, E90, 99, 99A, A99A, B99, 100, A100 and B100 Airplanes |
| aircraft | Textron Aviation Inc. | 65-90 | Airworthiness Directives; Beech Model 65, A65, A65-8200, 70, 65-80, 65-A80, 65-A80-8800, 65-B80, 65-88, 65-90, 65-A90, B90, C90, E90, 99, 99A, A99A, B99, 100, A100 and B100 Airplanes |
| aircraft | Textron Aviation Inc. | 65-A80 | Airworthiness Directives; Beech Model 65, A65, A65-8200, 70, 65-80, 65-A80, 65-A80-8800, 65-B80, 65-88, 65-90, 65-A90, B90, C90, E90, 99, 99A, A99A, B99, 100, A100 and B100 Airplanes |
| aircraft | Textron Aviation Inc. | 65-A80-8800 | Airworthiness Directives; Beech Model 65, A65, A65-8200, 70, 65-80, 65-A80, 65-A80-8800, 65-B80, 65-88, 65-90, 65-A90, B90, C90, E90, 99, 99A, A99A, B99, 100, A100 and B100 Airplanes |
| aircraft | Textron Aviation Inc. | 65-A90 | Airworthiness Directives; Beech Model 65, A65, A65-8200, 70, 65-80, 65-A80, 65-A80-8800, 65-B80, 65-88, 65-90, 65-A90, B90, C90, E90, 99, 99A, A99A, B99, 100, A100 and B100 Airplanes |
| aircraft | Textron Aviation Inc. | 65-B80 | Airworthiness Directives; Beech Model 65, A65, A65-8200, 70, 65-80, 65-A80, 65-A80-8800, 65-B80, 65-88, 65-90, 65-A90, B90, C90, E90, 99, 99A, A99A, B99, 100, A100 and B100 Airplanes |
| aircraft | Textron Aviation Inc. | 70 | Airworthiness Directives; Beech Model 65, A65, A65-8200, 70, 65-80, 65-A80, 65-A80-8800, 65-B80, 65-88, 65-90, 65-A90, B90, C90, E90, 99, 99A, A99A, B99, 100, A100 and B100 Airplanes |
Unsafe Condition
Failure of the wing lower forward spar attachment due to possible cracks in Inconel nuts.
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Required Actions
Visually inspect each Inconel nut in the lower forward wing spar attachments per Beech Service Bulletin No. 2248. If cracks are found, replace the nut with specially marked Part No. 81790-1414 nut per Figure 2 of the Service Bulletin. Return cracked nuts to Beech Aircraft Corporation.
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Compliance Time
Required prior to further flight after receipt of this AD unless already accomplished.
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Affected Aircraft
Beech Models 65, A65, A65-8200, 70, 65-80, 65-A80, 65-A80-8800, 65-B80, 65-88, 65-90, 65-A90, B90, C90, E90, 99, 99A, A99A, B99, 100, A100, B100 with Inconel bolts and nuts in the wing lower forward spar attachments and not equipped with Integral Fitting Spar Kits 90-4077-1S, 99-4023-1S, or 100-4007-1S. Specific serial ranges include L-1, L-2, L-6, LF-7, LF-8, LC-1 to LC-335; LB-1 to LB-35; LD-1 to LD-511; LP-1 to LP-47; LJ-1 to LJ-1087 (except LJ-1085); LW-1 to LW-347; U-1 to U-164 (except U-50); B-1 to B-247; BE-2 to BE-137.
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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