Commonwealth legislation

AD/B737/93 - Galley Feeder Wiring

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legislative instrument

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This directive requires inspection and modification of galley feeder wire bundles on specified Boeing 737‑200/‑300/‑400/‑500 aircraft fitted with listed Sabena Technics galleys, using Sabena Service Letter SAB 24‑001 Revision C (27 Mar 1995). Inspection must find and fix chafing; the modification is a mandated follow-up. Compliance deadlines are inspection within 300 hours and modification within 3,600 hours after 14 Sept 1995. Operators and maintenance organisations bear labour, parts and downtime costs and must follow the external service letter. The measure responds to a reported chafing-induced melt and short circuit that produced smoke and sparks.

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AD/B737/93 - Galley Feeder Wiring

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Boeing 737 Series Aeroplanes

AD/B737/93 Galley Feeder Wiring 10/95

Applicability: This Directive is applicable to all 737-200, -300, -400 and -500 model aircraft equipped with Sabena Technics galleys, Part Numbers as follows:

1-8501	1-8503	1-8504	1-9401	1-9406
1-10746	1-10805	1-10533	1-10743	1-10747
1-10748	1-10750	1-10751	1-10673	1-10666
1-10749	1-10972	1-10983	1-11162	1-11185
1-11199	1-11200	1-11350	1-11362	1-11363
1-11364	1-11374	1-11380	1-11735

Requirement: 1. Inspect the galley feeder wire bundles for chafing in accordance with Sabena Service Letter SAB 24-001 Revision C dated 27 March 1995, if necessary repair, replace or reposition in accordance with the Sabena Service Letter.

Modify the Galley feeder wire bundles in accordance with Sabena Service Letter SAB 24-001 Revision C dated 27 March 1995.

Note: Belgian AD 95-01 dated 25 April 1995 refers.

Compliance: 1. Within 300 hours time in service after 14 September 1995.

Within 3600 hours time in service after 14 September 1995.

Background: A Boeing 737-300 operator reported experiencing smoke and sparks emanating from the ceiling panel above the galley. Investigation revealed that the wire bundle feeding the galley was severed due to melting, which was caused by chafed wiring short circuiting. This Directive provides for early detection of chafing of the wire bundles.

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

1 AD/B737/93 - Galley Feeder Wiring