COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Oxygen Systems
AD/OXY/6 Passenger Oxygen Masks 2/92
Applicability: 02 Corporation Oxygen Mask Presentation Unit Part Numbers as follows:
121-040-04 | 150-004-03 | 151-020 |
50-0021 | 150-004-04 | 151-020-02 |
150-002-01 | 150-004-05 | 151-020-04 |
150-002-02 | 150-004-06 | 152-001 |
150-002-03 | 150-004-07 | l52-001-0l |
150-002-04 | 150-004-08 | 152-001-04 |
150-002-05 | 150-004-12 | 152-001-05 |
150-002-08 | 150-005 | 152-001-08 |
150-003T | 150-006 | 152-00l-13 |
150-003-04T | 150-022 | 152-003 |
150-004 | 151-010 | 152-004 |
150-004-01 | 151-010-02 | 152-004-05 |
150-004-02 | 151-010-04 |
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Note 1: Aircraft known to be fitted with the above part number oxygen boxes include but are not limited to, British Aerospace 125-800A; Challenger CL600-lAII, CL600- 2B16, and CL600-2A12; Gulfstream G-1159, G-1159A, G-1159B, and G-IV and
Falcon 20.
Note 2. FAA AD 91 10-05 Amendment 39-6989 refers.
Requirement: To prevent malfunctioning of the lanyard release pin that could prevent the flow of oxygen to a passenger in an emergency situation, accomplish the following:
(a) With the oxygen system activated, perform a test of the lanyard release pins by accomplishing the following:
(1) Open the passenger mask presentation units of the airplane and allow the mask assemblies to drop out.
(2) Make up a 3.4 Kg (7.5 lbs) weight with an attached string and hook, (eg, spring, clip, etc).
(3) Attach the hook to the lanyard attaching point of each actuator pin without dropping the weight and allow the weight to hang from the lanyard attaching point.
(b) If the pin pulls free from the oxygen actuator valve at 3.4 Kg or less of hanging weight, then the pin is satisfactory and the unit may be returned to service.
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
(c) If the pin does not pull free from the oxygen actuator valve using the test required by paragraph (a) of this AD, prior to further flight accomplish the following:
(1) Replace the pin with either part number 100-111-2 or 100-111-3, which has a 20-degree angle and a rounded nose.
Note: The pin is available from the manufacturer by contacting Mr Burt Parry, O2 Corporation, 3522 N. Comotara, Wichita, Kansas 67226; Telephone (316) 634-1240;
Facsimile (316) 634-1061.
(2) Test the replacement pin installation in accordance with the test requirements of paragraph (a) of this AD to assure that the lanyard pin can be removed with a pull of 3.4 Kg or less. If the pin pulls free from the oxygen actuator valve at 3.4 Kg or less of hanging weight, then the pin is satisfactory and the unit may be returned to service.
Compliance: Within 100 hours time in service after 03 February 1992.
Background: One incident has occurred where an inoperative oxygen supply system occurred because a lanyard pin could not be readily pulled. The actions specified by this AD are intended to prevent a malfunction that could result in an inoperative passenger oxygen system and possible serious physical impairment of passengers during an emergency situation.