AD 98-11-18
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | DG Flugzeugbau GmbH | DG-400 | Airworthiness Directives; Glaser-Dirks Flugzeugbau GmbH Model DG-400 Gliders |
Unsafe Condition
Failure of the propeller suspension system caused by cracks in the propeller mounts, which could result in loss of the propeller with consequent reduced glider controllability.
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Required Actions
Replace the upper rubber shock mounts with stainless steel mounts within 3 calendar months. Inspect the rear plate of the propeller mount for cracks and excessive gaps (over 1 mm or 0.04 inches) within 3 calendar months. If cracks are found, replace the propeller mount prior to further flight. If excessive gaps exist, install washers prior to further flight.
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Compliance Time
Within the next 3 calendar months after the effective date of this AD
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Affected Aircraft
Glaser-Dirks Flugzeugbau GmbH Model DG-400 gliders, all serial numbers.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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