Airworthiness Directives; The Boeing Company Airplanes
airworthiness · Rule · Final rule; request for comments. · Published 2021-07-20 · Effective 2021-07-20 · 86 FR 38214
Document
Document number
2021-15391
Federal Register citation
86 FR 38214
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
The Boeing Company
Publication date
2021-07-20
Effective date
2021-07-20
FAA docket
Docket No. FAA-2021-0561
Abstract
The FAA is adopting a new airworthiness directive (AD) for all The Boeing Company Model 737 airplanes. This AD was prompted by reports of latent failures of the cabin altitude pressure switches. This AD requires repetitive functional tests of the pressure switches, and on- condition actions, including replacement, if necessary. The FAA is issuing this AD to address the unsafe condition on these products.