AD/BEECH 50/2 Cylinder Head Thermocouple 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/BEECH 50/2.

Beechcraft 50 (Twin Bonanza) Series Aeroplanes

AD/BEECH 50/2 Cylinder Head Thermocouple 5/2008

Requirement:

CANCELLED.

This AD is cancelled on 8 May 2008.

Background:

This unique Australian AD, probably issued in 1959, required relocation of the cylinder head thermocouple to the hottest cylinder in accordance with Beechcraft Service Bulletin (SB) 50, B50 - No. 3 (issued 15 May 1954), rather than a State of Design AD.  Compliance was forthwith.

As all affected aircraft would have complied with this AD by now, it is considered that the unsafe condition no longer exists.

James Coyne
Delegate of the Civil Aviation Safety Authority

25 March 2008