# AD 47-32-10: Rotor Mast Assembly Replacement

- Type: Airworthiness directive
- Status: Current
- Products: Scotts-Bell 47 47B and 47B3
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Registered aircraft: 1 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C6D9C5F313E411CE86256A34004DBD9E.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/47-32-10

## The airworthiness directive

47-32-10 BELL: (Was Mandatory Note 10 of AD-1H-1.) Applies to Models 47B and 47B3 Helicopters.

Compliance required at the next 50-hour transmission teardown inspection.

Replace the main rotor mast assembly with mast assembly, 47-130-100-2.

(Bell Service Bulletin 47C24, dated June 26, 1947, also covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS H-1](https://openairdocs.org/tcds/H-1): Scott's-Bell 47 Inc; names 2 of 9 models: 47B, 47B3

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 1 (1 by airframe model, 0 by engine model)
- Makers: Bell 1

Models with the most aircraft:

- [Bell 47B](https://openairdocs.org/model/bell-47b): 1 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/47-32-10/models.md
Every aircraft: https://openairdocs.org/ad/47-32-10/aircraft.md

Its text cites no advisory circulars or STCs.

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