# AD 47-41-05: Gimbal Ring Bearing Seals

- 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- Superseded by: Nothing supersedes this AD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/A26CAA96F3868FC586256A34004DE291.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/47-41-05

## The airworthiness directive

47-41-05 BELL: (Was Mandatory Note 17 of AD-1H-2.) Applies to All Models in 47B Series, Through Serial Number 78.

Compliance required at next 100-hour inspection.

In order that the bearings will be securely locked in the gimbal ring, the fiber bearing seals should be replaced with steel bearing seals, P/N 27-120-127-1.

This alteration is covered by Bell Service Bulletin 47C30 dated July 10, 1947.

## 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/47-41-05/models.md
Every aircraft: https://openairdocs.org/ad/47-41-05/aircraft.md

Its text cites no advisory circulars or STCs.

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