- Effective
- March 1, 1977
- Models
- SA26-AT, SA26-T
- Data sheet
- TCDSA5SW
- Registered aircraft
- 9 matched by model
- Product
- Aircraft · Large airplane
- Amendment
- 39-2840
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 |
|---|---|---|---|
| FAA DRS HTML | 22 KB | 21f72e1a…f3ecfec | FAA DRS (API key needed) |
On this page
The airworthiness directive
77-04-08 SWEARINGEN : Amendment 39-2840. Applies to Models SA26-T and SA26-AT.
Compliance required as indicated.
To prevent failures of spar brackets, P/N 26-31060-1, 26-31060-3, 26-31063-1, and 26-31063-3, accomplish the following inspections and modifications:
(a) Within the next ten flight hours, unless already accomplished within the last 100 flight hours, inspect the spar brackets in accordance with Swearingen Aviation Corporation Service Bulletin A57-00-27, revised January 14, 1977, or later FAA approved revisions.
(b) If cracks were found, before further flight, incorporate repair in accordance with Swearingen Aviation Corporation Service Bulletin A57-00-27, revised January 14, 1977, or later FAA approved revisions.
(c) If no cracks are found at initial inspection, inspect the aircraft each 100 flight hours thereafter or until the repair is incorporated.
(d) Alternate methods of spar bracket repair must be approved by the Chief, Engineering and Manufacturing Branch, Southwest Region, FAA.
This amendment becomes effective March 1, 1977.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 9
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1968 | 1 |
|---|---|
| 1969 | 3 |
| 1970 | 2 |
3 with no year recorded