Airworthiness Directives; The Boeing Company Airplanes
The comment period closed Oct 2, 2026.
The FAA proposes to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 737 -300, -400, and -500 series airplanes. This proposed AD was prompted by reports of nuisance stick shaker activation while accelerating to cruise speed at the top of a climb due to frozen angle of airflow (AOA) sensor vanes. This proposed AD would require installing new external case heaters (ECHs)
Summary from the Federal Register.
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Full history
- Aug 18, 2026
Rule published
Airworthiness Directives; The Boeing Company Airplanes
Transportation Department
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From the Federal Register. This record was last updated Sep 28, 2026. About our data
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