AD/BEECH 33/21 Amdt 1 Hatshelf Soundproofing Blanket 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 33/21 Amdt 1.

Beechcraft 33 and 35-33 (Debonair/Bonanza) Series Aeroplanes

AD/BEECH 33/21 Amdt 1 Hatshelf Soundproofing Blanket 4/2008

Requirement:

CANCELLED.

This AD is cancelled on 10 April 2008.

Background:

This Airworthiness Directive (AD), originally issued in 1975 and amended in 1979, required an inspection to ensure a good bond existed between the cabin soundproofing blanket and the bottom of the hat shelf in accordance with Beechcraft Service Instruction (SI) 0694-311 Revision 1.  The manufacturer considered the inspection and/or repair was necessary to prevent the possibility of the blanket coming into contact with primary control cables.  Inspection and/or repair was at intervals of 100 hours TIS.

Although this AD was repetitive (imposed by the manufacturer) it has been promulgated for a number of years with no reports of defects in the defect reporting system.  Also, the requirement should be covered by normal maintenance practices which require inspection of control cable runs.

This AD is therefore cancelled.

David Villiers
Delegate of the Civil Aviation Safety Authority

29 February 2008