# AD 81-25-01: Flyweights

- Type: Airworthiness directive
- Status: Current
- Products: Maule Aerospace Technology M-5-235C and Flyweights
- Effective: December 7, 1981
- Superseded by: Nothing supersedes this AD
- Product type: Appliance
- Amendment: 39-4269
- Registered aircraft: 181 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D353D5FD5C8B764386256A390069357D.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/81-25-01

## The airworthiness directive

81-25-01 WOODWARD GOVERNOR COMPANY: Amendment 39-4269. Applies to Model F210681 Serial Numbers 1446751 through 1446783, 1446785 through 1446806, 1446808, 1446809, 1446811, 1446812, 1446814 through 1446817, 1567547 through 1567562, 1567564 through 1567594, and 1567596 through 1567612 installed on Maule M5 235C airplanes.

Compliance is required as indicated, unless already accomplished. To prevent the possible failure of the flyweights, accomplish the following:

Within the next 50 hours time in service from the effective date of this AD, remove Woodward Governor Model F210681 with the above listed serial numbers and replace with a Woodward Governor Model F210681 S/N not listed above in accordance with Woodward Service Bulletin 33576 dated October 1981.

This amendment becomes effective December 7, 1981.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 3A23](https://openairdocs.org/tcds/3A23): Maule Aerospace Technology Inc.; names 1 of 50 models: M-5-235C

## 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: 181 (181 by airframe model, 0 by engine model)
- Makers: Maule 181

Models with the most aircraft:

- [Maule M-5-235C](https://openairdocs.org/model/maule-m-5-235c): 181 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/81-25-01/models.md
Every aircraft: https://openairdocs.org/ad/81-25-01/aircraft.md

Its text cites no advisory circulars or STCs.

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