AD/OXY/3 Amdt 1 - Puritan-Bennett Oxygen Regulator Diaphragm - Replacement (Cth)

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES

Oxygen Systems

AD/OXY/3 Amdt 1

Puritan-Bennett Oxygen Regulator NK Diaphragm - Replacement

Applicability: Puritan-Bennett Aero Systems Company oxygen masks as follows : P/N 174039 S/N 0001-0012, P/N 174010-01 and 174010-03 S/N 00100-00144, 00146, 00147, 00149-00259, 00261-00273, 00275-00292, 00294-00390 and P/N ZMR 100 series S/N 6603-7234.

Requirement: 1. Remove diaphragm assembly P/N F334-1001-1 and install diaphragm assembly P/N F334-1001-1 modified to include diaphragm and plate assembly P/N F334- 1003-1 Revision E.

2. After modification per para. 1, permanently mark letter "M" at the end of or beneath the mask serial number. This serial number is located under the face cushion on the left-hand side of the hardshell on the 174039 and ZMR 100 series masks, and on the back surface of the head harness on the 174010-01 and 174010- 03 masks.

3. The modified diaphragm replacement (para. 1) shall be accomplished by returning the mask to Puritan-Bennett Aero Systems Company, 111 Penn Street, El Segundo, California 90245, USA. However this replacement in ZMR 100 series masks listed below may be accomplished in the field in accordance with the following Puritan-Bennett Aero Systems ATA Component Maintenance Manuals:

35-10-25 for the ZMR 160 mask. 35-10-27 for the ZMR 129 mask. 35-10-28 for the ZMR 129-1 mask. 35-10-29 for the ZMR 118 mask.

Note 1. Puritan-Bennett Aero Systems Company Service Bulletin No. 1 pertains to this subject.

Note 2. FAA AD 81-08-04 Amendment 39-4092 refers.

Compliance: Within 100 hours time in service after 30 June 1981.

Note: Oxygen masks which have previously been reworked in accordance with AD/OXY/3 are deemed to comply with this Directive AD/OXY/3A.