# Proposed AD FAA-2007-28980: Aircraft Industries, a.s. (Type Certificate No. G24EU Formerly Held by LETECKE ZAVODY a.s. and LET Aeronautical Works) Model L-13 Blanik Gliders

- Type: Proposed airworthiness directive (not in force)
- Status: Comment period closed
- Products: Aircraft Industries, a.s.
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 4, 2007, 72 FR 56700
- Comments due: November 5, 2007
- Docket: FAA-2007-28980 (https://www.regulations.gov/docket/FAA-2007-28980, where comments are filed)
- Project: 2007-CE-071-AD
- FR document: E7-19619
- Official PDF: https://openairdocs.org/files/sha256/46/77/46772d02f312d0c2a361aea5d69cab4db0665cd8c5f768d7657c548d3218124b (from https://www.govinfo.gov/content/pkg/FR-2007-10-04/pdf/E7-19619.pdf)
- Federal Register: https://www.federalregister.gov/documents/2007/10/04/E7-19619/airworthiness-directives-aircraft-industries-as-type-certificate-no-g24eu-formerly-held-by-leteck
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D7B00338458B71A48625736A004BCCF0.0001
- Page: https://openairdocs.org/proposed/FAA-2007-28980

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. 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:

This Airworthiness Directive (AD) is prompted by the discovery of cracks on L13 BLANIK sailplanes in zones where the forward and aft control sticks are attached to the connecting rod, designated as "control bridge'' in the relevant Illustrated Parts Catalogues (IPC). If left uncorrected, cracks could propagate and lead to failure of the connecting rod with subsequent loss of control of the sailplane.

The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Oct 4, 2007: Notice of proposed rulemaking (NPRM). (first notice), FR document E7-19619, comments due Nov 5, 2007 (https://www.federalregister.gov/documents/2007/10/04/E7-19619/airworthiness-directives-aircraft-industries-as-type-certificate-no-g24eu-formerly-held-by-leteck)

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