AD 86-05-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Maryland Air Industries, Inc. | F-27 | Airworthiness Directives; Fairchild Model F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27A | Airworthiness Directives; Fairchild Model F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27B | Airworthiness Directives; Fairchild Model F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27F | Airworthiness Directives; Fairchild Model F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27G | Airworthiness Directives; Fairchild Model F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27J | Airworthiness Directives; Fairchild Model F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27M | Airworthiness Directives; Fairchild Model F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | FH-227 | Airworthiness Directives; Fairchild Model F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | FH-227B | Airworthiness Directives; Fairchild Model F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | FH-227C | Airworthiness Directives; Fairchild Model F27 and FH227 Series Airplanes |
Unsafe Condition
Cracks in the FH227 and F27 main landing gear drag strut assemblies due to surface break-up in the bores of some tubes generated during the drawing process.
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Required Actions
Inspect left and right upper main undercarriage drag stay for flaws using eddy current or ultrasonic inspection equipment following Dowty Rotol Service Bulletins 32-45N (FH227) or 32-81C (F27). Replace damaged parts before next flight if flaws are found.
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Compliance Time
Within 400 hours time-in-service after April 13, 1986 for airplanes with ≥20,000 landings prior; within 800 hours time-in-service for those with 10,000-20,000 landings; and within 2,000 hours time-in-service for others. Adjustments possible upon FAA approval.
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Affected Aircraft
Maryland Air Industries, Inc. Models F27 (all variants) and FH227 series airplanes certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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