EASA AD US-2021-05-11
Mar 30, 2021Flight Controls - Spoiler Control Module - Operational Test
Federal Aviation Administration Airworthiness Directive 2021-05-11 is a final rule addressing certain Boeing Company Model 757 airplanes. It mandates repetitive operational tests of the spoiler inhibit function and, for some airplanes, installation of new relay bracket assemblies, wiring changes to spoiler control modules (SCMs), installation of new SCMs, and clearance measurements. This directive aims to improve lateral handling qualities during approach and landing by mitigating unwanted lateral oscillations.
- Boeing 757