# Proposed AD FAA-2013-0220: Slingsby Sailplanes Ltd. Sailplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2013-09-09
- Products: Slingsby Sailplanes
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 6, 2013, 78 FR 14467
- Comments due: April 22, 2013
- Became: [AD 2013-09-09](https://openairdocs.org/ad/2013-09-09)
- Docket: FAA-2013-0220 (https://www.regulations.gov/docket/FAA-2013-0220, where comments are filed)
- Project: 2013-CE-002-AD
- FR document: 2013-05229
- Official PDF: https://openairdocs.org/files/sha256/e2/ce/e2ce33e80e507b5bdcd55dc9dc2a97ac4208e6988e352e34f85d5a2d26009d9c (from https://www.govinfo.gov/content/pkg/FR-2013-03-06/pdf/2013-05229.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/03/06/2013-05229/airworthiness-directives-slingsby-sailplanes-ltd-sailplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A9707782D5B4AF3C86257B26005D04E8.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0220

## Summary

We propose to adopt a new airworthiness directive (AD) for all Slingsby Sailplanes Ltd. Models Dart T.51, Dart T.51/17, and Dart T.51/ 17R sailplanes equipped with aluminum alloy spar booms that would supersede an existing AD. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as an incident of glue joint failure on a starboard wing caused by water entering the area of the airbrake box that resulted in delamination and corrosion in the area of the aluminum alloy spar booms and the wing attach fittings. We are issuing this proposed AD to require actions to address the unsafe condition on these products.

## Notices in this docket

- Mar 6, 2013: Notice of proposed rulemaking (NPRM). (first notice), FR document 2013-05229, comments due Apr 22, 2013 (https://www.federalregister.gov/documents/2013/03/06/2013-05229/airworthiness-directives-slingsby-sailplanes-ltd-sailplanes)

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