AD 2025-03-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | SAS | Airworthiness Directives; Airbus SAS Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Airbus SAS Airplanes |
Unsafe Condition
Occurrences were reported of trimmable horizontal stabilizer actuators (THSAs) delivered to operators having erroneous information (accumulated life) in the authorized release certificates. These THSAs were released to service between 2014 and 2024 at some Collins Aerospace Maintenance, Repair, and Overhaul (MRO) facilities where the THSA screw jack assemblies were replaced with parts having higher cumulative operating life than was documented on the authorized release certificates.
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Required Actions
Contacting Collins Aerospace for approved instructions for obtaining amended authorized release certificates, which will allow operators to correctly manage the maintenance consequences of erroneous accumulated life values and ensure compliance with ADs and required airworthiness limitations (Airworthiness Limitations Section (ALS) Part 4). Replacement of affected THSAs and prohibition of the installation of affected THSAs.
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Compliance Time
Before further flight
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Affected Aircraft
All Airbus SAS Model A318 and A319 series airplanes; Model A320-211, 212, -214, -215, -216, -231, -232, -233, -251N, -252N, -253N, -271N, -272N, and -273N airplanes; Model A321 series airplanes; Model A330-201, -202, -203, -223, -243, -223F, -243F, -301, -302, -303, -321, -322, -323, -341, -342, -343, -743L, -841, and -941 airplanes; and Model A340-211, -212, -213, -311, -312, -313, -541, -542, -642, and -643 airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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