AD/Cessna 550/11 TKS Proportioning Unit Connections Cancelled (Cth)

AIRWORTHINESS DIRECTIVE

On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive AD/CESSNA 550/11.

Cessna 550 (Citation II) Series Aeroplanes

AD/CESSNA 550/11 TKS Proportioning Unit Connections 12/2009

Requirement:

CANCELLED.

This AD is cancelled on 19 November 2009.

Background:

This AD, raised in1986 against Cessna Citation Alert Service Letter (SL) SLAS
550-30-05, required inspections that would ensure that the TKS fluid tube assemblies of the anti-ice system were correctly identified and routed.  Compliance was required before issue of a certificate of airworthiness.

As all affected aircraft will have been inspected and modified long ago, this AD is no longer required.

David Villiers
Delegate of the Civil Aviation Safety Authority

27 September 2009