AD 81-12-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Flug- und Fahrzeugwerke Ag | Diamant 16.5 | Airworthiness Directives; FLUG UND FAHRZEUGWERKE Model Diamant HBV and 16.5 Gliders |
| aircraft | Flug- und Fahrzeugwerke Ag | HBV Diamant | Airworthiness Directives; FLUG UND FAHRZEUGWERKE Model Diamant HBV and 16.5 Gliders |
Unsafe Condition
Loss of the rudder lower close tolerance bolt could result in loss of the rudder.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the rudder close tolerance bolt for tightness every 25 flight hours until replacement. Replace the bolt before January 1, 1982, following Service Bulletin 10 or FAA-approved equivalent. Check deflections and free movement of controls after replacement.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight, and thereafter at intervals not to exceed 25 flight hours until replacement. Replacement must be accomplished prior to January 1, 1982.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Flug- und Fahrzeugwerke AG Model Diamant HBV and 16.5 gliders, all serial numbers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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