# Bell Alert Service Bulletin 206-20-139

Copy: Revision A ("Bell ASB 206-20-139 Rev A"), 12 pages: PDF https://openairdocs.org/files/sha256/67/3d/673d8314d6d9ad9596552eb80da2341963e01e42fc73e44cb3901fb8d2374b53; text https://openairdocs.org/service-documents/bell/sb-206-20-139/file/673d8314d6d9.md. Rights: © Bell Textron Inc. Filed by the FAA in regulations.gov docket FAA-2022-1488, the docket of AD 2023-06-05. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Bell](https://openairdocs.org/service-documents/bell.md)
- Type: Service bulletin (Alert Service Bulletin)
- Number: 206-20-139
- Latest revision known: 206-20-139, Revision A, dated August 21, 2020 (OpenAirDocs)
- Page: https://openairdocs.org/service-documents/bell/sb-206-20-139

## ADs that cite it (1) (OpenAirDocs)

Newest first, with the revision each names, as OpenAirDocs read it from the AD's text.

- [AD 2023-06-05](https://openairdocs.org/ad/2023-06-05.md), effective May 19, 2023: Revision A

Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bell/sb-206-20-139/proposed.md), [1 NTSB investigation](https://openairdocs.org/service-documents/bell/sb-206-20-139/ntsb.md).

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