AD 2016-17-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A318 and A319 | Airworthiness Directives; Airbus Airplanes |
Unsafe Condition
Partial loss of no-back brake (NBB) efficiency due to premature wear of carbon friction disks on the THSA, leading to reduced braking efficiency in specific aerodynamic load conditions. This could result in uncommanded movements of the trimmable horizontal stabilizer and loss of control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect certain THSAs to determine the total flight cycles accumulated. Replace the THSA if necessary, based on the inspection results and specified flight-cycle limits.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the compliance times specified in the AD, which vary based on the total flight cycles accumulated by the THSA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Airbus Model A318 and A319 series airplanes, Model A320-211, -212, -214, -231, -232, and -233 airplanes, and Model A321 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
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