- Published
- August 1, 1957
- Issued
- August 1, 1957
- Model
- PA-23
- Data sheet
- TCDS1A10
- Registered aircraft
- 155 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 | 20 KB | 4170b748…c9d2566 | FAA DRS (API key needed) |
On this page
The airworthiness directive
57-01-02 PIPER: Applies to Model PA-23, Serial Numbers 23-1 to 23-844 Inclusive.
Compliance required not later than February 15, 1957.
The following inspection and action is necessary in order to prevent the possibility of stabilizer failure or malfunction in the event the proper number of bolts are not found attaching the front stabilizer fittings, right and left, P/N 17093-00.
Inspect the two front stabilizer attachment fittings and ascertain that there are three bolts securing each fitting to the longitudinal stringer and the bulkhead (two in the stringer and one in the bulkhead). If less than three bolts have been used, the unsatisfactory condition must be corrected. It will be necessary to remove the stabilizer fairing on the bottom side, and to use a mirror to make the inspection.
(Piper Service Bulletin No. 150 of December 21, 1956, covers this same subject.)
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 155
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1954 | 9 |
|---|---|
| 1955 | 34 |
| 1956 | 34 |
| 1957 | 37 |
| 1958 | 1 |
| 1963 | 1 |
39 with no year recorded