AD 96-10-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | HB Aircraft Industries AG | HB-23 2400 | Airworthiness Directives; HB Flugtechnik GmbH Model HB-23/2400 Sailplanes |
Unsafe Condition
Cracking of the threaded adjustable extension joints and incorrect rigging of the elevator control system could result in failure of the elevator control system, leading to possible loss of elevator control and loss of the sailplane.
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Required Actions
Inspect (one time) the elevator control push rod tube for dents or bending and replace if damaged. Inspect elevator control system for incorrect rigging ensuring at least 3 mm clearance between the elevator control lever and push rod. Repetitively inspect threaded adjustable push rod joints every 500 hours time-in-service for cracks or deformation, replacing joints if found damaged.
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Compliance Time
Initially within the next 50 hours time-in-service after the effective date of this AD, and as indicated in the body of this AD thereafter.
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Affected Aircraft
HB Aircraft Industries AG Model HB-23/2400 sailplanes (serial numbers 23001 through 23048)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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