AD 87-25-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | ATR - GIE Avions de Transport R gional | ATR42-200 | Airworthiness Directives; AEROSPATIALE Model ATR-42 Airplanes |
| aircraft | ATR - GIE Avions de Transport R gional | ATR42-300 | Airworthiness Directives; AEROSPATIALE Model ATR-42 Airplanes |
| aircraft | ATR - GIE Avions de Transport R gional | ATR42-320 | Airworthiness Directives; AEROSPATIALE Model ATR-42 Airplanes |
| aircraft | ATR - GIE Avions de Transport R gional | ATR42-500 | Airworthiness Directives; AEROSPATIALE Model ATR-42 Airplanes |
Unsafe Condition
Loss of aileron control due to autopilot servo freezing
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the autopilot roll actuator per Honeywell Service Bulletin 21-1987-063, inspect all actuators for improperly installed rubber plug, and ensure foreign debris does not enter the actuator during modification.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 10 hours time-in-service
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
AEROSPATIALE Model ATR-42 airplanes, including ATR42-200, ATR42-300, ATR42-320, ATR42-500, 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.