FAA Tightens Rules on Airbus A330 A340 Stabilizer Fixes
Published Date: 2/4/2025
Rule
Summary
The FAA is updating safety rules for certain Airbus A330 and A340 airplanes to fix a problem with the stabilizer actuator that could go unnoticed and cause trouble. This new rule, effective March 11, 2025, keeps previous fixes but adds clearer steps and extra actions for some planes. Airlines will need to follow these updated procedures to keep flights safe, with some costs expected for the changes.
Analyzed Economic Effects
3 provisions identified: 2 benefits, 1 costs, 0 mixed.
Fixes to stabilizer actuator to prevent loss
The FAA requires updated fixes to the trimmable horizontal stabilizer actuator (THSA) and the electrical load sensing device (ELSD) on certain Airbus A330 and A340 airplanes to prevent possible mechanical disconnection and loss of control. The AD continues prior requirements but adds revised procedures and additional actions, and is effective March 11, 2025.
Costs for U.S. operators to comply
The FAA estimates the AD affects 120 U.S.-registered airplanes and imposes compliance costs on operators. Retained actions from AD 2022-16-06 are estimated up to $27,845 per airplane (57 work-hours at $85/hour = $4,845 labor plus up to $23,000 parts) for a U.S. total up to $3,341,400; new actions are estimated $44,391 per airplane (5 work-hours = $425 plus $43,966 parts) for a U.S. total up to $5,326,920.
Manufacturer warranty may reduce operator cost
The manufacturer says some or all costs of complying with the AD may be covered under warranty, which could reduce the cost impact on affected operators. The FAA notes it does not control warranty coverage.
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