Airworthiness directives › 2025-04-14
AD 2025-04-14 Airworthiness Directives; Schempp-Hirth Flugzeugbau GmbH Gliders
Applicability*9
This AD applies to Schempp-Hirth Flugzeugbau GmbH Model Duo Discus gliders serial numbers (S/Ns) 1 through 422 (inclusive) and Duo Discus T gliders S/Ns 1 through 96 (inclusive), certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 12 months after the effective date of this AD, modify the canopy locking mechanism by installing a compression spring in the canopy locking mechanism, installing spring washers at the canopy actuating levers, modifying the front actuating lever to include a magnet and applying a red mark to the front and aft inside the left canopy frame; or installing a front actuating lever that has a magnet, in accordance with the applicable technical note specified in paragraph (g)(1) or (2) of this AD. (1) For Model Duo Discus gliders: Appendix to Technical Note No. 380-1/396-6 attached to Schempp-Hirth Flugzeugbau GmbH Technical Note No. 380-1, No. 396-6 dated July 27, 2004 (issued as one document). (2) For Model Duo Discus T gliders: Appendix to Technical Note No. 868-4/890-5 attached to Schempp-Hirth Flugzeugbau GmbH Technical Note No. 868-4, No. 890-5 dated February 23, 2005 (issued as one document).
Unsafe condition
This AD was prompted by reports of gliders' canopies opening during air tow. The FAA is issuing this AD to address the canopy locking mechanism opening during flight. The unsafe condition, if not addressed, could lead to the canopy opening in flight, resulting in loss of control of the glider.
Affected ADs
None.
Read the original on the Federal Register →
You just looked this one up by hand
TrackAD holds all 12,278 of them and matches them against the aircraft you actually look after — airframe, engine, propeller and appliances in one pass — then works out what falls due and when.
- Bring your existing list in from a spreadsheet Paste the rows straight out of Excel. Headers like C/W Date and N/A are read for you.
- A copy that works when this does not One file. No internet, no login, no this software running. For the morning something has to be produced and the computer is not cooperating.
- $5 a month, or $50 a year Up to 50 aircraft on either.
Look round a real shop first Start free
The demonstration shop is eleven real aircraft with a year of work behind them. No account needed.
The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1