AD 98-04-31
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
Operating the airplane in severe icing conditions outside the certification envelope may lead to potential hazards due to inadequate flight crew information on recognizing and exiting such conditions.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Revise the Airplane Flight Manual (AFM) Limitations Section to prohibit flight in severe icing conditions as determined by visual cues, limit or prohibit use of flight control devices in such conditions, and provide recognition cues and exit procedures. Revise Normal Procedures Section to limit flap use and prohibit autopilot use when ice forms aft of wing protected surfaces or if unusual trim conditions occur.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Effective Date: March 25, 1997
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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