AD 98-10-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Alexander Schleicher GmbH & Co. | ASK 21 | Airworthiness Directives; Alexander Schleicher Segelflugzeugbau Model ASK 21 Sailplanes |
Unsafe Condition
The use of inaccurate weight and balance information provided in the sailplane flight manual (SFM) could lead to hazardous flight conditions.
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Required Actions
Replace page 2 (dated May 16, 1984) and page 13 (dated February 16, 1984) from the SFM with new pages 2 and 13 dated June 4, 1984, in accordance with Technical Note No. 13 a. The revisions must be entered into the aircraft records as per 14 CFR 43.9.
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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
Alexander Schleicher GmbH & Co. Model ASK 21 sailplanes, all serial numbers, equipped with modifications in Technical Note 3 or 7.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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