- Effective
- April 11, 1968
- Models
- M-4, M-4-210, M-4-210C, M-4-220C, M-4-220S, M-4C, M-4S, M-4T
- Data sheet
- TCDS3A23
- Registered aircraft
- 196 matched by model
- Product
- Aircraft · Small airplane
- Amendment
- 39-578
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
|---|---|---|---|
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On this page
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 TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 196
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1962 | 1 |
|---|---|
| 1963 | 16 |
| 1964 | 15 |
| 1965 | 15 |
| 1966 | 13 |
| 1967 | 8 |
| 1968 | 6 |
| 1969 | 5 |
| 1970 | 10 |
| 1971 | 12 |
| 1972 | 23 |
| 1973 | 29 |
43 with no year recorded