AD 98-12-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Alexander Schleicher GmbH & Co. | ASK 21 | Airworthiness Directives; Alexander Schleicher Segelflugzeugbau Models ASW-19 and ASK 21 Sailplanes |
| aircraft | Alexander Schleicher GmbH & Co. | ASW-19 | Airworthiness Directives; Alexander Schleicher Segelflugzeugbau Models ASW-19 and ASK 21 Sailplanes |
| aircraft | Alexander Schleicher GmbH & Co. | ASW-19B | Airworthiness Directives; Alexander Schleicher Segelflugzeugbau Models ASW-19 and ASK 21 Sailplanes |
Unsafe Condition
Loss of the canopy caused by design deficiency, airbrake failure caused by cracking, and rudder panel flutter caused by high density altitude conditions, all of which could result in reduced sailplane controllability.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the rudder panel in accordance with Technical Note ASW 19 No. 2; replace the airbrake bellcrank with an improved design per Technical Note ASK 21 No. 20; modify the rear canopy hinge per Technical Note ASK 21 No. 20.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 3 calendar months after the effective date of this AD (July 14, 1998).
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Affected Aircraft
Alexander Schleicher GmbH & Co. Models ASW-19 (serial numbers 19019 through 19037, 19040, and 19042 through 19044) and ASK 21 (serial numbers 21001 through 21345).
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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