Document ID: chunk:federal_register_of_legislation:F2006B02877:body:0:p3
Version: federal_register_of_legislation:F2006B02877
Segment Type: other
Provision Reference: 
Character Range: 5727–7477

Requirement 3 - Initially concurrent with Requirement 1 and thereafter at intervals not to exceed 1,000 hours time in service (TIS), in accordance with the maintenance tip, until replacement of existing PDP rigid bus assemblies with new, improved PDP rigid bus assemblies having part number 1032181-2 or 1032185-2, as applicable, according to Boeing SB 737-24-1128 is accomplished.

           For Requirement 4 - Within 1,000 hours TIS after accomplishment of the eighth Requirement 3 torque check and thereafter within 1,000 hours TIS after every subsequent eighth torque check, until replacement of existing PDP rigid bus assemblies with new, improved PDP rigid bus assemblies having part number 1032181-2 or 1032185-2, as applicable, according to Boeing SB 737-24-1128 is accomplished.

           This Airworthiness Directive becomes effective on 21 February 2002.

           Background: This Directive initially requires an inspection of the PDPs to verify proper installation of the power feeder terminals together with associated hardware and, if necessary, corrective actions. The Directive also requires repetitive torque checks of the terminal attachment screws and repetitive replacement of the PDP rigid bus assembly with a new assembly until optional terminating action is accomplished.

           These actions are intended to prevent overheating, melting, and subsequent failure of the power feeder terminals, which could result in increased risk of fire and the loss of electrical power from the associated alternating current power source.

 Eugene Paul Holzapfel
 Delegate of the Civil Aviation Safety Authority 14 January 2002

 The above AD is notified in the Commonwealth of Australia Gazette on 30 January 2002.