70-21-03: Chute Coupling

FAA order 70-21-03 is an airworthiness directive in force since November 5, 1970. The FAA's subject line: Chute Coupling. It names Bolkow PHOEBUS A-1: about 6 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: other and general.

What it applies to as the FAA lists it

Kind of product: Aircraft
Makes: Entwicklungsgemeinschaft Sport- und Segelflug
Models: Phoebus A1, Phoebus B1, Phoebus C
On this site: Bolkow PHOEBUS A-1 6 registered

Dates and paperwork

In force since: November 5, 1970
Docket: Unknown
Status: Current
The FAA's document: Read the order on the FAA's site

The order itself the regulatory text, as published

Show the full text (632 characters)

70-21-03  ENTWICKLUNGSGEMEINSCHAFT:  Amendment 39-1088.  Applies to Model "PHOEBUS" A1, B1, and C Sailplanes up to and including S.N 934 which have a brake chute installed. 

	To prevent the rudder from becoming blocked by the back-slipping chute coupling, within the next 100 hours' time in service after the effective date of this AD, unless already accomplished, 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 an FAA-approved equivalent. 

	This amendment becomes effective November 5, 1970.

Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/70-21-03.json · aircraft systems.