# Bell Alert Service Bulletin 505-21-20

## Copies (5)

Copies the FAA filed in AD dockets on regulations.gov, newest revision first. A newer revision may exist.

- Revision C ("Bell ASB 505-21-20 Rev C"), 21 pages: PDF https://openairdocs.org/files/sha256/3f/44/3f44889809f35bde2865c654d7b418ccba76b76e2a6e94ac3ec8d754b7922f20; text https://openairdocs.org/service-documents/bell/sb-505-21-20/file/3f44889809f3.md. Rights: © Bell Textron Inc. Filed by the FAA in regulations.gov docket FAA-2021-0729; AD 2022-04-06 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Revision B ("Bell ASB 505-21-20 Rev B"), 7 pages: PDF https://openairdocs.org/files/sha256/d9/13/d9137b3ada1cb6ebd1de24ae957f7ef202b7873d1d580efe9e87817c0931312f; text https://openairdocs.org/service-documents/bell/sb-505-21-20/file/d9137b3ada1c.md. Rights: © Bell Textron Inc. Filed by the FAA in regulations.gov docket FAA-2021-0144; AD 2021-06-06 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Bell 505 RFM TR for For Pilot Collective (ASB 505-21-20) BHT-505-FM-1 TR-6 ("Bell 505 RFM TR for For Pilot Collective (ASB 505-21-20) BHT-505-FM-1 TR-6"), 8 pages: PDF https://openairdocs.org/files/sha256/74/2a/742a851db9b2606b66ce509300ddd007ea93f06e1526b921c91ff4dadc3351be; text https://openairdocs.org/service-documents/bell/sb-505-21-20/file/742a851db9b2.md. Rights: © Bell Textron Inc. Filed by the FAA in regulations.gov docket FAA-2021-0144; AD 2021-06-06 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Bell 505 RFM TR For Pilot Collective (ASB 505-21-20) BHT-505-FM-2 TR-1 ("Bell 505 RFM TR For Pilot Collective (ASB 505-21-20) BHT-505-FM-2 TR-1"), 8 pages: PDF https://openairdocs.org/files/sha256/e2/81/e281b431214e6db15420c64021c7a8960a4ce93128811b0504427e194d05c41e; text https://openairdocs.org/service-documents/bell/sb-505-21-20/file/e281b431214e.md. Rights: © Bell Textron Inc. Filed by the FAA in regulations.gov docket FAA-2021-0144; AD 2021-06-06 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Bell ASB 505-21-20 ("Bell ASB 505-21-20"), 6 pages: PDF https://openairdocs.org/files/sha256/96/99/9699668239df14f85449550712a0cddf830a6dc0e4ebfa7719087fb8c7050354; text https://openairdocs.org/service-documents/bell/sb-505-21-20/file/9699668239df.md. Rights: © Bell Textron Inc. Filed by the FAA in regulations.gov docket FAA-2021-0144; AD 2021-06-06 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Bell](https://openairdocs.org/service-documents/bell.md)
- Type: Service bulletin (Alert Service Bulletin)
- Number: 505-21-20
- Latest revision known: 505-21-20, Revision C, dated March 11, 2021 (OpenAirDocs)
- Page: https://openairdocs.org/service-documents/bell/sb-505-21-20

## ADs that cite it (3) (OpenAirDocs)

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

- [AD 2022-04-06](https://openairdocs.org/ad/2022-04-06.md), effective Apr 4, 2022: Revisions A, B and C
- [AD 2021-06-06](https://openairdocs.org/ad/2021-06-06.md), effective Mar 31, 2021: Revisions A and B
- [AD 2021-05-52](https://openairdocs.org/ad/2021-05-52.md): No revision named

Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bell/sb-505-21-20/proposed.md).

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