Commonwealth legislation

AD/B747/109 - Passenger Oxygen System Continuous Flow Control Unit

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This Airworthiness Directive from the Civil Aviation Safety Authority requires operators of the Boeing 747 aeroplanes listed in Boeing Service Bulletin 747-35-2074 Revision 1 to carry out the bulletin’s maintenance on passenger oxygen system flow control units within 4,000 flight hours after 30 April 1992.

It addresses manufacturing defects that can prevent automatic oxygen deployment; compliance is the operators’ responsibility and must be scheduled and performed by them or their maintenance providers following Boeing’s instructions.

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Current sections

Direct links to the current provisions in AD/B747/109 - Passenger Oxygen System Continuous Flow Control Unit.

AD/B747/109 - Passenger Oxygen System Continuous Flow Control Unit

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Boeing 747 Series Aeroplanes

AD/B747/109 Passenger Oxygen System Continuous

Flow Control Unit

5/92

Applicability: Boeing 747 series aircraft listed in Boeing Service Bulletin 747-35-2074 Revision 1.

Requirement: Action in accordance with the Accomplishment Instructions of Boeing Service Bulletin 747-35-2074 Revision 1.

Note: FAA AD 92-04-03 Amdt 39-8172 refers.

Compliance: Within 4000 hours time in service after 30 April 1992.

Background: The FAA has received reports of flow control units not activating at the proper altitude during a maintenance check of the system; the malfunction being caused by manufacturing defects in the flow control units. The defective units, if not replaced, can prevent the automatic deployment of oxygen to the passenger oxygen system in the event of loss of cabin pressure.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

1 AD/B747/109 - Passenger Oxygen System Continuous Flow Control Unit