# Proposed AD FAA-2023-0921: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2023-12-13
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 3, 2023, 88 FR 27725
- Comments due: May 23, 2023
- Became: [AD 2023-12-13](https://openairdocs.org/ad/2023-12-13)
- Docket: FAA-2023-0921 (https://www.regulations.gov/docket/FAA-2023-0921, where comments are filed)
- Project: AD-2022-01430-T
- FR document: 2023-09436
- Official PDF: https://openairdocs.org/files/sha256/b3/cc/b3cca78f5d745ac60d406c5d8c30d0b86bd975381601168b6b1a042353cd1b16 (from https://www.govinfo.gov/content/pkg/FR-2023-05-03/pdf/2023-09436.pdf)
- Federal Register: https://www.federalregister.gov/documents/2023/05/03/2023-09436/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2023-09436-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2023-0921

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2022-05-04, which applies to all The Boeing Company Model 737-100, - 200, -200C, -300, -400, -500, -600, -700, -700C, -800, -900, and -900ER series airplanes, except for Model 737-200 and -200C series airplanes equipped with a certain flight control system. AD 2022-05-04 requires revising the limitations and operating procedures sections of the existing airplane flight manual (AFM) to incorporate specific operating procedures for instrument landing system (ILS) approaches, speedbrake deployment, go-arounds, and missed approaches, when in the presence of 5G C-Band interference as identified by Notices to Air Missions (NOTAMs). Since the FAA issued AD 2022-05-04, the FAA determined that additional limitations are needed due to the continued deployment of new 5G C-Band base stations whose signals are expected to cover most of the contiguous United States at transmission frequencies between 3.7- 3.98 GHz. This proposed AD would require revising the limitations and operating procedures sections of the existing AFM to incorporate specific operating procedures for ILS approaches, speedbrake deployment, go-arounds, and missed approaches, due to the presence of 5G C-Band interference. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- May 3, 2023: Notice of proposed rulemaking (NPRM). (first notice), FR document 2023-09436, comments due May 23, 2023 (https://www.federalregister.gov/documents/2023/05/03/2023-09436/airworthiness-directives-the-boeing-company-airplanes)

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