- Published
- December 4, 1956
- Issued
- December 4, 1956
- Models
- PA-18, PA-20, PA-22
- Registered aircraft
- 1,032 matched by model
- Product
- Aircraft · Small airplane
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 November 21, 2025.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| FAA DRS HTML | 19 KB | 19bba3b3…bbbf650 | FAA DRS (API key needed) |
On this page
The airworthiness directive
53-24-04 PIPER: Applies to PA-18, Serial Numbers 18-1 to 18-3000 Inclusive; PA-20, Serial Numbers 20-1 to 20-928 Inclusive; and PA-22, Serial Numbers 22-1 to 22-1689 Inclusive.
Compliance required not later than February 1, 1954.
In order to preclude the possibility of loss of fuel and hydraulic oil and fire in flight caused by chafing of these lines between the firewall and muffler, the following should be accomplished:
(a) To prevent contact with the muffler, reroute the fuel primer line, and wheel brake hydraulic line if necessary, so that they do not pass behind the muffler.
(b) Use clamps to fasten the lines to the firewall to prevent movement and vibration of these lines.
(Piper Aircraft Corp. Service Letter No. 213 covers this alteration.)
Affected TCDS · 3
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 1,032
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1949 | 10 |
|---|---|
| 1950 | 199 |
| 1951 | 160 |
| 1952 | 84 |
| 1953 | 96 |
| 1954 | 43 |
| 1955 | 34 |
| 1956 | 28 |
| 1957 | 42 |
| 1958 | 32 |
| 1959 | 33 |
| 1960 | 24 |
| 1961 | 5 |
| 1962 | 1 |
| 1963 | 2 |
| 1964 | 5 |
| 1965 | 1 |
| 1971 | 2 |
| 1975 | 1 |
| 1977 | 1 |
| 2021 | 1 |
228 with no year recorded