Transportation Department Docket FAA-2016-9393 Final Rule

2017-14923: Airworthiness Directives; Airbus Airplanes

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Summary

We are superseding Airworthiness Directive (AD) 2013-13-16 for all Airbus Model A330-200, A330-200 Freighter, A330-300 series airplanes; and all Airbus Model A340-200, -300, -500, and -600 series airplanes. AD 2013-13-16 required repetitive inspections for discrepancies of the ball-screw assembly of the trimmable horizontal stabilizer actuator (THSA), repetitive greasing of the THSA ball-nut, and replacement of the THSA if necessary; and modification or replacement (as applicable) of the ball-nut assembly, which ends certain repetitive inspections. This new AD requires an inspection, corrective actions if necessary, lubrication of the ball-nut, modification of the THSA, and removal of certain airplanes from the applicability. This AD was prompted by a determination that a modification that automatically detects failure of the ball-screw assembly is necessary. We are issuing this AD to address the unsafe condition on these products.

The agency’s own summary, as published.

What this changes

Amends 1 part of the Code of Federal Regulations — the standing rules this notice rewrites.

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