- Effective
- July 29, 1975
- Model
- B4-PC11
- Data sheet
- TCDSG25EU
- Registered aircraft
- 20 matched by model
- Product
- Aircraft · Glider
- Amendment
- 39-2284
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 | 20 KB | 8115152e…74a4b9b | FAA DRS (API key needed) |
On this page
The airworthiness directive
75-16-11 PILATUS AIRCRAFT LTD: Amdt. 39-2284. Applies to B4-PC11 gliders, serial numbers 141 and subsequent, certificated in all categories. Compliance is required as indicated. To prevent rudder cable chaffing, jamming, or separation accomplish the following: (a) Within 10 hours' time in service after the effective date of this AD, unless already accomplished, visually inspect the rudder control cables for chaffing in that portion adjacent to the crotch strap attachment brackets and repair, or replace as required in accordance with the Pilatus B4- PC11 Maintenance Manual or an FAA-approved equivalent. (b) Within 25 hours' time in service after the effective date of this AD, unless already accomplished, install a polyurethane foam block P/N 112.50.11.065 on the underside of the pilot seat to provide a grooved channel to cover the crotch strap attachment bracket in accordance with the accomplishment instructions set forth in Pilatus Aircraft Service Bulletin No. 1002 datedMay 1974, or an FAA-approved equivalent. This amendment becomes effective July 29, 1975.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 20
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1972 | 1 |
|---|---|
| 1973 | 2 |
| 1974 | 7 |
| 1976 | 6 |
| 1977 | 1 |
3 with no year recorded