Commonwealth legislation

AD/JT9D/21 - Drain Tube Replacement

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This directive from the Civil Aviation Safety Authority requires operators to replace three drain tubes and one tee fitting on Pratt & Whitney JT9D-7R4 engines installed on Boeing 767s, using Boeing Service Bulletin 767-71A0057. It aims to prevent oil loss from chafing of the number three oil pressure line.

Affected Boeing 767 operators must schedule and bear the costs of parts, labour and downtime and complete the mandated replacement before 31 December 1990 to remain compliant.

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AD/JT9D/21 - Drain Tube Replacement

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Pratt and Whitney Turbine Engines - JT9D Series

AD/JT9D/21 Drain Tube Replacement 5/90

Applicability: JT9D-7R4 engines fitted to Boeing 767 aircraft.

Requirement: Replace three existing drain tubes and a tee fitting as detailed in Boeing Service Bulletin 767-71A0057.

Compliance: Prior to 31 December 1990.

Background: This Directive requires replacement of certain drain lines and a tee fitting to prevent possible oil loss due to chafing of the number three oil pressure line against a drain tube tee fitting.

Source text

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