# AD 68-07-08: Rudder Trim Tab Control

- Type: Airworthiness directive
- Status: Current
- Products: Maule Aerospace Technology M-4, M-4-210, M-4-210C, M-4-220C, M-4-220S, M-4C, M-4S and M-4T
- Effective: April 11, 1968
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-578
- Registered aircraft: 196 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DD51D7E750FC72C586256A380064C16A.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/68-07-08

## The airworthiness directive

68-07-08 MAULE: Amdt. 39-578. Applies to Models M-4, Serial Numbers 3 thru 94, M- 4C, Serial Numbers 1C thru 10C, M-4S, Serial Numbers 1S thru 3S, M-4T, Serial Numbers 1T thru 3T, M-4-210, Serial Numbers 1001 thru 1045, M-4-210C, Serial Numbers 1001C thru 1064C, M-4-220S, Serial Numbers 2001S thru 2003S, and M-4-220C, Serial Numbers 2001C thru 2006C, series aircraft.

Compliance: Required as indicated, unless already accomplished.

To prevent loss of rudder trim tab control and resultant interference within aileron operation, accomplish the following:

Within the next 50 hours' time in service after the effective date of the airworthiness directive, modify the rudder trim tab hinges in accordance with either Maule Aircraft Corporation Service Letter Number 14, dated February 19, 1968, or any other method approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Central Region.

This amendment becomes effective April 11, 1968.

## 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 8 of 50 models: M-4-210, M-4-210C, M-4, M-4C, M-4T, M-4-220C, M-4S, M-4-220S

## 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: 196 (196 by airframe model, 0 by engine model)
- Makers: Maule 196

Models with the most aircraft:

- [Maule M-4-220C](https://openairdocs.org/model/maule-m-4-220c): 83 aircraft (airframe model)
- [Maule M-4-210C](https://openairdocs.org/model/maule-m-4-210c): 46 aircraft (airframe model)
- [Maule M-4](https://openairdocs.org/model/maule-m-4): 42 aircraft (airframe model)
- [Maule M-4-210](https://openairdocs.org/model/maule-m-4-210): 12 aircraft (airframe model)
- [Maule M-4C](https://openairdocs.org/model/maule-m-4c): 6 aircraft (airframe model)
- [Maule BEE DEE M-4-210](https://openairdocs.org/model/maule-bee-dee-m-4-210): 5 aircraft (airframe model)
- [Maule M-4S](https://openairdocs.org/model/maule-m-4s): 1 aircraft (airframe model)
- [Maule M-4T](https://openairdocs.org/model/maule-m-4t): 1 aircraft (airframe model)

All 8 models: https://openairdocs.org/ad/68-07-08/models.md
Every aircraft: https://openairdocs.org/ad/68-07-08/aircraft.md

Its text cites no advisory circulars or STCs.

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