# AD 75-16-17: Wing, Fuselage and Tailplane

- Type: Airworthiness directive
- Status: Current
- Products: Szybowcowy Zaklad Doswiadczalny SZD-24-4A Foka-4
- Effective: July 29, 1975
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Glider
- Amendment: 39-2291
- Registered aircraft: 1 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/07498217691F274886256A56006BD413.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/75-16-17

## The airworthiness directive

75-16-17 SZYBOWCOWY ZAKLAD DOSWIADCZALNY: Amendment 39-2291. Applies to SZD-24-4A FOKA 4 gliders, all serial numbers, certificated in all categories.

Compliance is required within the next 10 hours time in service after the effective date of this AD, unless already accomplished, and thereafter at intervals of 50 hours time in service from the last inspection.

To prevent structural failure of wing, fuselage, and tailplane, accomplish the following:

1. Inspect the wing, fuselage, tailplane and associated components or parts in accordance with "Detailed Range of the Glider Inspection", paragraphs 2.1 thru 2.4.5 of Annex Nr. 1 of SZD-24-4A Service Manual Edition II, dated 1967, or an FAA approved equivalent.

2. Repair or replace parts, components, or structure found to be unserviceable in accordance with "Removing of the Faults", paragraphs 3.1 thru 3.6 of Annex Nr. 1 of SZD-24-4A Service Manual Edition II, dated 1967, or an FAA-approved equivalent.

This amendment becomes effective July 29, 1975.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS G10EU](https://openairdocs.org/tcds/G10EU): Szybowcowy Zaklad Doswiadczalny; names 1 of 1 models: SZD-24-4A Foka-4

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 1 (1 by airframe model, 0 by engine model)
- Makers: Szybowcowy Zaklad Doswiadczaln 1

Models with the most aircraft:

- [Szybowcowy Zaklad Doswiadczaln SZD-24-4A "FOKA"-4](https://openairdocs.org/model/szybowcowy-zaklad-doswiadczaln-szd-24-4a-foka-4): 1 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/75-16-17/models.md
Every aircraft: https://openairdocs.org/ad/75-16-17/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.