# AD 75-17-12: Dive Brake Retraction Failure

- Type: Airworthiness directive
- Status: Current
- Products: Slingsby T.59.D Kestrel
- Effective: August 18, 1975
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Glider
- Amendment: 39-2314
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/188C116400E53EDC86256A56005B93C9.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/75-17-12

## The airworthiness directive

75-17-12 SLINGSBY SAILPLANES: Amendment 39-2314. Applies to Slingsby T59D Kestrel gliders certificated in all categories.

Compliance is required as indicated, unless already accomplished.

To prevent dive brake retraction failure, accomplish the following:

  (a) Within the next 10 hours' time in service after the effective date of this AD, install a placard on the instrument panel in full view of the pilot reading:

"AIR BRAKE EXTENSION LIMITATION FINAL APPROACH 50% FLAREOUT ON LANDING 100% CRUISE NONE (0%)"

  (b) Within the next 50 hours' time in service after the effective date of this AD, replace the dive brake control mechanism with the linear type dive brake control mechanism, P/N 59A-45-717, in accordance with Slingsby Sailplanes Technical Instruction No. 75 dated May 21, 1975, or an FAA approved equivalent.

  (c) The placard required by paragraph (a) of this AD may be removed after the work specified in paragraph (b) of this AD has been accomplished.

This amendment becomes effective August 18, 1975.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS G27EU](https://openairdocs.org/tcds/G27EU): Slingsby Sailplanes; names 1 of 1 models: T.59.D Kestrel

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

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