AD 2016-11-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | LET Aeronautical Works | Various | Airworthiness Directives; BLANIK LIMITED Gliders |
| aircraft | Aviat | Various | Airworthiness Directives; BLANIK LIMITED Gliders |
Unsafe Condition
Lack of distinct color marking of the elevator drive, which could lead to improper installation and significant elevator deflection changes, potentially resulting in loss of control.
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Required Actions
Paint the elevator drive mechanism using a contrasting color (e.g., red) following LET Mandatory Bulletin MB No.: L13/082a. Ensure only properly oriented and painted elevator bellcranks are installed to prevent backward installation.
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Compliance Time
Within 3 calendar months after the applicable effective date (November 8, 1999, for Model L-13 Blanik; July 14, 2016, for Model L-13 AC Blanik).
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Affected Aircraft
BLANIK LIMITED Models L-13 Blanik and L-13 AC Blanik gliders, all serial numbers, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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