AD 70-21-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Entwicklungsgemeinschaft Sport- und Segelflug | Phoebus A1 | Airworthiness Directives; Entwicklungsgemeinschaft Model "PHOEBUS" A1, B1, and C Sailplanes |
| aircraft | Entwicklungsgemeinschaft Sport- und Segelflug | Phoebus B1 | Airworthiness Directives; Entwicklungsgemeinschaft Model "PHOEBUS" A1, B1, and C Sailplanes |
| aircraft | Entwicklungsgemeinschaft Sport- und Segelflug | Phoebus C | Airworthiness Directives; Entwicklungsgemeinschaft Model "PHOEBUS" A1, B1, and C Sailplanes |
Unsafe Condition
The rudder may become blocked by the back-slipping chute coupling.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the chute coupling with a modified coupling in accordance with Messerschmitt-Bolkow-Blohm Service Bulletin No. Phoebus-1/70 dated April 1970, or later LBA-approved issue or FAA-approved equivalent.
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Compliance Time
within the next 100 hours' time in service after the effective date of this AD
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Affected Aircraft
Entwicklungsgemeinschaft Sport-und Segelflug Model Phoebus A1, B1, and C Sailplanes up to and including S.N. 934 with a brake chute installed.
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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