AD/OXY/2 Scott Oxygen Mask Filter Retention Modification 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/OXY/2.

Oxygen Systems

AD/OXY/2 Scott Oxygen Mask
Filter Retention - Modification 4/2009

Requirement:

CANCELLED.

This AD is cancelled on 9 April 2009.

Background:

This unique Australian AD raised in 1978 against Scott Aviation Installation Instruction dated October 1977, or Mitsubishi Service Note 39, or Piper Vendor Service Publication (VSP) VSP-8 required a modification ensure oxygen mask filter (restrictor) is retained in the Sky Mask during storage and/or use.

Compliance was within 100 hours TIS after 30 April1978.

As all affected mask assemblies would have been modified by now, this AD is considered to be no longer required.

James Coyne
Delegate of the Civil Aviation Safety Authority

12 February 2009