Commonwealth legislation

AD/B767/55 - Centre Fuel Tank Override Pumping Unit Diffuser Assembly

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This directive orders operators of specific Boeing 767 airframes (line numbers 1–359, 361–362) to complete the corrective actions in Boeing Alert Service Bulletin 767-28A0036 by 31 May 1991. It addresses a safety defect where a brazed joint on certain override pump units can separate and potentially create an ignition source in the centre fuel tank. The bulletin (and a related Sundstrand alert) contains the technical remedy operators must follow.

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AD/B767/55 - Centre Fuel Tank Override Pumping Unit Diffuser Assembly

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Boeing 767 Series Aeroplanes

AD/B767/55 Centre Fuel Tank Override Pumping

Unit Diffuser Assembly

Applicability: Model 767 line number 1 through 359, 361 and 362. Requirement: Action in accordance with Boeing Alert SB 767-28A0036.

Note: Sundstrand Alert SB 5006286-28-A4 refers.

Compliance: Prior to 31 May 1991.

7/91

Background: On certain S/N override pumping units the brazed joint attaching the diffuser ring to the diffuser sleeve may separate. If this occurred during a dry pump operation an ignition source may occur within the centre tank.

Source text

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