Commonwealth legislation

AD/B767/97 - Battery Ground Termination Inspection

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Commonwealth

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legislative instrument

Plain English Summary

3/10 complexity

Requires operators of all Boeing 767 aircraft to perform a detailed visual inspection of the APU battery ground terminations, fix any damage or improper configuration per Boeing wiring practices, and repeat the check every 1,000 flight hours. Repairs must be completed before further flight; installing Boeing Alert Service Bulletin 767-24A0111 ends the repetitive checks. The rule targets a fire/smoke hazard from improperly installed or maintained APU battery grounds and allocates inspection and repair costs to aircraft operators.

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AD/B767/97 - Battery Ground Termination Inspection

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Boeing 767 Series Aeroplanes

AD/B767/97 Battery Ground Termination Inspection 12/97

Applicability: All Boeing model 767 aircraft.

Requirement: 1. Perform a detailed visual inspection to detect damage and to verify proper configuration of the battery ground terminations of the APU at the battery and connected structure:

If no damage is detected, ensure all battery ground terminations are configured properly (i.e., all required washer and other parts installed, and termination bolts are torqued properly) in accordance with Boeing Standard Wiring Practices Manual D6-54446.

b. If any damage is detected or any battery ground termination is found to be configured improperly, remove, replace, and repair the battery ground termination, as applicable, in accordance with Boeing Standard Wiring Practices Manual D6-54446 and applicable Boeing drawings.

Note: FAA AD 97-15-09 Amdt 39-10083 refers.

Compliance: 1. The initial inspection is to be completed by the 9th January 1998.

2. The visual inspection is to be repeated at intervals not to exceed 1,000 flight hours.

3. Requirement 1b is prior to further flight.

Installation of Boeing Alert Service Bulletin 767-24A0111 is considered terminating action for the repetitive inspections.

This airworthiness directive becomes effective on 6 November 1997.

Background: The FAA has received several reports of smoke or fire that originated in areas adjacent to the auxiliary power unit (APU) battery grounds on Boeing Model 767 series airplanes. Investigation revealed that APU battery grounds were not installed/maintained properly on these airplanes. In addition, the existing design of the battery ground (i.e., single lug) is prone to overheating when installed improperly. Such improper installation/maintenance, if not corrected, could result in heat damage to the battery ground of the APU and consequent smoke/fire on the airplane.

Source text

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

1 AD/B767/97 - Battery Ground Termination Inspection