AD 2001-23-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 757 | Airworthiness Directives; Boeing Model 757 Series Airplanes |
Unsafe Condition
A fractured spring washer in a geared rotary actuator (GRA) could lead to a disconnect in the GRA, resulting in a slat skew condition and reduced controllability of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Review maintenance records or inspect to determine the serial numbers of GRAs for the leading edge slats. Replace certain GRAs with new or reworked actuators. Ensure that GRAs with part number series and serial number listed under Section 1.A. of Hamilton Sundstrand Service Bulletins 5006397/755299-27-21 or 5006398/755300-27-21 are reworked and marked with '-21' on the modification plate.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 18 months for specific GRAs on slat number 2 outboard, slat number 9 outboard, slat number 4 inboard, and slat number 7 inboard on Boeing 757-200 series airplanes with line numbers 1 through 803 without an enhanced slat skew or loss detection system. Within 36 months for other slats on those airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Boeing Model 757 series airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.