AD 85-21-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Maryland Air Industries, Inc. | F-27 | Airworthiness Directives; Fairchild Models F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27A | Airworthiness Directives; Fairchild Models F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27B | Airworthiness Directives; Fairchild Models F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27F | Airworthiness Directives; Fairchild Models F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27G | Airworthiness Directives; Fairchild Models F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27J | Airworthiness Directives; Fairchild Models F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | F-27M | Airworthiness Directives; Fairchild Models F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | FH-227 | Airworthiness Directives; Fairchild Models F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | FH-227B | Airworthiness Directives; Fairchild Models F27 and FH227 Series Airplanes |
| aircraft | Maryland Air Industries, Inc. | FH-227C | Airworthiness Directives; Fairchild Models F27 and FH227 Series Airplanes |
Unsafe Condition
Cracks due to stress corrosion in the riveted rod end assembly, part number 27-727404-11, on rudder control push-pull tubes, part numbers 27-727402-11 (or -41) and -31 (or -51).
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the riveted rod end, part number 27-727404-3, of the rudder control push-pull tubes for cracks using specified service bulletins. Replace cracked rod assemblies before further flight with same part number or FAA-approved equivalent, or replace with new rod end assembly part number 27-727404-31. Submit inspection findings report to FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 50 hours time in service after the effective date of this AD, unless already accomplished within the last 150 hours time in service, and thereafter at intervals not to exceed 200 hours in service from the last inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Fairchild Models F27 (serial numbers 1 through 128) and FH227 series airplanes (serial numbers 501 through 578), certificated in any category.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.