AD 59-05-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Maryland Air Industries, Inc. | F-27 | FAIRCHILD Model F-27 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27A | FAIRCHILD Model F-27 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27B | FAIRCHILD Model F-27 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27F | FAIRCHILD Model F-27 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27G | FAIRCHILD Model F-27 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27J | FAIRCHILD Model F-27 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27M | FAIRCHILD Model F-27 Aircraft |
Unsafe Condition
Corrosion of the pilot valve assembly in Bendix 38E09-3B, 38E09-3C, and 38E09-3D deicer shutoff and regulating valves can cause malfunctions.
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Required Actions
Perform a functional performance check of the pneumatic wing deicing system before each flight into icing conditions. Inspect valves every 100 hours for corrosion, clean, apply DC-7 compound, and reinstall. Replace old valves with Bendix P/N 38E09-4E by June 1, 1959.
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Compliance Time
Not later than June 1, 1959, and with inspections at next inspection period but not exceeding 100 hours thereafter.
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Affected Aircraft
Fairchild Model F-27 aircraft, serial numbers 1 through 11, 14 through 23, and 27 through 35.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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