Commonwealth legislation

AD/B737/226 - Main Fuel Tank Aft Fuel Boost Pump Wiring

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

6/10 complexity

This AD requires operators of certain Boeing 737 variants to inspect, repair if needed, and secure the aft fuel boost pump wiring in the main fuel tanks by installing brackets, clamps and spacers per Boeing Alert Service Bulletin 737-28A1148 (Rev 2), issued under CASA's authority (CASR 1998 subreg 39.1(1)). It affects aircraft operators and maintenance organisations, who pay for and carry out the inspections, repairs and installations specified in the service bulletin to meet the AD's compliance obligations.

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AIRWORTHINESS DIRECTIVE

View image in the official source

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

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Boeing 737 Series Aeroplanes

AD/B737/226 Main Fuel Tank Aft Fuel Boos

AD/B737/226 Main Fuel Tank Aft Fuel Boost Pump Wiring 8/2004

Applicability: Model 737-600, 737-700, 737-700C, 737-800 and 737-900 series aeroplanes, as listed in Boeing Alert Service Bulletin (ASB) 737-28A1148, Revision 2, dated 18 December 2003.

Note 1: The term ‘service bulletin’, as used in this Directive, means the Accomplishment Instructions of Boeing Alert Service Bulletin 737-28A1148, Revision 2, dated 18 December 2003.

Requirement 1. For aeroplanes listed in the service bulletin as Groups 1, 2, 3 and 4 on which Boeing ASB 737-28A1148, dated 14 September 2000, has been accomplished and for aeroplanes listed in the service bulletin as Groups 5, 6 and 7 - Install screws and spacers to secure the applicable wire bundles for the aft fuel boost pumps of the main fuel tanks in accordance with the service bulletin.

2. For aeroplanes listed in the service bulletin as Groups 1 and 2 on which Boeing ASB 737-28A1148, dated 14 September 2000, has not been accomplished - Perform a general visual inspection of the applicable wire bundles for the aft fuel boost pumps of the main fuel tanks for chafing or other damage in accordance with the service bulletin.

3. If any discrepancies were noted during the Requirement 2 visual inspection, perform any applicable corrective action together with installing a new bracket, clamp and spacers to secure the wire bundles in accordance with the service bulletin.

4. For aeroplanes listed in the service bulletin as Groups 3 and 4 on which ASB 737-28A1148, dated 14 September 2000, has not been accomplished \- Perform, in accordance with the service bulletin, a general visual inspection of the applicable wire bundles for the aft fuel boost pumps of the main fuel tanks to determine if the wire bundle is secured with a clamp, if the bundles are clamped no further action is necessary.

5. If, the Requirement 4 inspection reveals that the wire bundles are not clamped, in accordance with the service bulletin, repair the wire bundle if chaffing has occurred and install a new bracket, clamp and spacers to ensure sufficient clearance between the rear spar and structure and the wire bundles.

Source text

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

AIRWORTHINESS DIRECTIVE AIRWORTHINESS DIRECTIVE

AIRWORTHINESS DIRECTIVE

Boeing 737 Series Aeroplanes

AD/B737/226 Main Fuel Tank Aft Fuel Boos AD/B737/226 Main Fuel Tank Aft Fuel Boost Pump Wiring 8/2004

AD/B737/226 Main Fuel Tank Aft Fuel Boost Pump Wiring 8/2004

Applicability: Model 737-600, 737-700, 737-700C, 737-800 and 737-900 series aeroplanes, as listed in Boeing Alert Service Bulletin (ASB) 737-28A1148, Revision 2, dated 18 December 2003.

Note 1: The term ‘service bulletin’, as used in this Directive, means the Accomplishment Instructions of Boeing Alert Service Bulletin 737-28A1148, Revision 2, dated 18 December 2003.

2. For aeroplanes listed in the service bulletin as Groups 1 and 2 on which Boeing ASB 737-28A1148, dated 14 September 2000, has not been accomplished - Perform a general visual inspection of the applicable wire bundles for the aft fuel boost pumps of the main fuel tanks for chafing or other damage in accordance with the service bulletin.

3. If any discrepancies were noted during the Requirement 2 visual inspection, perform any applicable corrective action together with installing a new bracket, clamp and spacers to secure the wire bundles in accordance with the service bulletin.

4. For aeroplanes listed in the service bulletin as Groups 3 and 4 on which ASB 737-28A1148, dated 14 September 2000, has not been accomplished \- Perform, in accordance with the service bulletin, a general visual inspection of the applicable wire bundles for the aft fuel boost pumps of the main fuel tanks to determine if the wire bundle is secured with a clamp, if the bundles are clamped no further action is necessary.

5. If, the Requirement 4 inspection reveals that the wire bundles are not clamped, in accordance with the service bulletin, repair the wire bundle if chaffing has occurred and install a new bracket, clamp and spacers to ensure sufficient clearance between the rear spar and structure and the wire bundles.