# Proposed AD FAA-2026-7237: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Comment period closed
- Products: Boeing 737-300 Series, 737-400 Series and 737-500 Series
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 18, 2026, 91 FR 53391
- Comments due: October 2, 2026
- Docket: FAA-2026-7237 (https://www.regulations.gov/docket/FAA-2026-7237, where comments are filed)
- Project: AD-2025-01425-T
- FR document: 2026-16795
- Official PDF: https://openairdocs.org/files/sha256/38/7d/387d2d86057ca54c8149a677702234fa7513c95431596f71ee439129a795b137 (from https://www.govinfo.gov/content/pkg/FR-2026-08-18/pdf/2026-16795.pdf)
- Federal Register: https://www.federalregister.gov/documents/2026/08/18/2026-16795/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2026-16795-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2026-7237

## Summary

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) on the left and right AOA sensors, performing repetitive functional tests and applicable corrective actions, and accomplishing applicable concurrent actions. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Aug 18, 2026: Notice of proposed rulemaking (NPRM). (first notice), FR document 2026-16795, comments due Oct 2, 2026 (https://www.federalregister.gov/documents/2026/08/18/2026-16795/airworthiness-directives-the-boeing-company-airplanes)

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