Airworthiness Directives; The Boeing Company Airplanes
airworthiness · Rule · Final rule; request for comments. · Published 2021-05-18 · Effective 2021-06-02 · 86 FR 26826
Document
Document number
2021-10562
Federal Register citation
86 FR 26826
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
The Boeing Company
Publication date
2021-05-18
Effective date
2021-06-02
FAA docket
Docket No. FAA-2021-0270
Abstract
The FAA is adopting a new airworthiness directive (AD) for all The Boeing Company Model 737-300, -400, and -500 series airplanes. This AD was prompted by a flap synchro wire failure that may go undetected by the autothrottle (A/T) computer. This AD requires repetitive BITE (built-in test equipment) tests of the A/T computer to detect a flap synchro wire failure, and corrective action if necessary. The FAA is issuing this AD to address the unsafe condition on these products.