AD 73-20-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Maryland Air Industries, Inc. | F-27 | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27A | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27B | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27F | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27G | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27J | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | F-27M | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | FH-227 | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | FH-227B | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
| aircraft | Maryland Air Industries, Inc. | FH-227C | Airworthiness Directives; Fairchild Model F-27 and FH-227 Aircraft |
Unsafe Condition
Corrosion or cracking of front and rear horizontal stabilizer spar fittings, part numbers 27-213003-11, -12 and 27-213002-11, due to accumulated in-service time of 2500 hours or more.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect stabilizer spar fittings within 30 days or within the last 11 months using Fairchild Service Bulletins F-27-55-21 and FH-227-55-12 or an approved equivalent procedure. Repeat inspections every 12 calendar months or 2500 hours in service, whichever comes first. Replace corroded or cracked parts before further flight with same part numbers or approved equivalents.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 30 days unless accomplished within the last 11 months
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Fairchild Model F-27 and FH-227 aircraft with front and rear horizontal stabilizer spar fittings part numbers 27-213003-11, -12 and 27-213002-11 that have accumulated 2500 hours or more in service.
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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