AD 65-26-01
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
Corrosion of the magnesium aileron control sectors.
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Required Actions
Visually inspect all surfaces of each aileron sector for corrosion. If corrosion is found, replace the part with an unused part of the same part number or an equivalent approved part, replace with Fairchild Hiller aluminum aileron sectors of specified part numbers, or remove corrosion following specified service letters and reinspect within 16 weeks. If no corrosion is found, repeat inspection within one year.
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Compliance Time
Within the next four weeks after the effective date (December 17, 1965) for airplanes with two or more years installed time on the effective date, or before the accumulation of two years and four weeks installed time for those with less than two years installed time, unless already accomplished within the last twelve weeks.
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Affected Aircraft
Maryland Air Industries, Inc. Model F-27, F-27A, F-27B, F-27F, F-27G, F-27J, F-27M airplanes with aileron sectors P/N 27-727207-21, 27-727208-21, 27-727209-21, 27-727300-21, or 27-727381-21.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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