AD 65-28-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Maryland Air Industries, Inc. | F-27 | Airworthiness Directives; Fairchild Model F-27 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27A | Airworthiness Directives; Fairchild Model F-27 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27B | Airworthiness Directives; Fairchild Model F-27 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27F | Airworthiness Directives; Fairchild Model F-27 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27G | Airworthiness Directives; Fairchild Model F-27 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27J | Airworthiness Directives; Fairchild Model F-27 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27M | Airworthiness Directives; Fairchild Model F-27 Series Airplanes |
Unsafe Condition
Cracks in engine mount attachment fittings could result in engine separation.
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Required Actions
Inspect engine mount fittings for cracks using a 10-power glass or equivalent, clean surfaces prior to inspection, and replace cracked fittings with inspected parts or approved equivalents. Reinspect at intervals not exceeding 300 hours' time in service.
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Compliance Time
Within the next 50 hours' time in service after the effective date, or within the 250 hours' time in service before the effective date. For fittings with 10,000+ hours, reinspect at intervals not exceeding 300 hours. For those under 10,000 hours, reinspect before 10,150 hours' time in service or after 9,850 hours, then at 300-hour intervals.
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Affected Aircraft
Fairchild Model F-27 Series airplanes with Upper Engine Mount Fittings P/N 27-503148-31, -32, -41, -42, -51, -52, -61, -62 and Lower Engine Mount Fittings P/N 27-503149-11, -12, -31, -32, -41, -42.
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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