AD 69-13-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Maryland Air Industries, Inc. | F-27 | Airworthiness Directives; Fairchild-Hiller Model F-27 Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27A | Airworthiness Directives; Fairchild-Hiller Model F-27 Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27B | Airworthiness Directives; Fairchild-Hiller Model F-27 Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27F | Airworthiness Directives; Fairchild-Hiller Model F-27 Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27G | Airworthiness Directives; Fairchild-Hiller Model F-27 Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27J | Airworthiness Directives; Fairchild-Hiller Model F-27 Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27M | Airworthiness Directives; Fairchild-Hiller Model F-27 Airplanes |
Unsafe Condition
Working of the wing outer panel fuel access door attach bolts may cause cracking of the lower skin radiating from the holes drilled for attaching screws of the nut retainer plate assembly.
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Required Actions
For serial numbers 1 through 65, comply with Service Bulletin No. 57-4, Revision 2. For serial numbers 1 through 75, comply with Service Bulletin 57-5, Revision 1. Both must be done via an equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region.
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Compliance Time
within the next 400 hours' time in service after the effective date of this AD
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Affected Aircraft
Fairchild-Hiller Model F-27 Airplanes, serial numbers 1 through 75
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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