Commonwealth legislation

AD/B737/173 - Power Distribution Panels

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Commonwealth

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legislative instrument

Plain English Summary

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This Airworthiness Directive requires operators of Boeing 737‑600/‑700/‑800 aeroplanes fitted with specified power distribution panels to carry out a one‑time visual check of six power‑feeder terminals on PDPs P91 and P92 to confirm proper installation. The inspection is visual, performed with a flashlight through access holes in the PDP covers, and must follow Boeing maintenance documentation referenced in the AD. It affects aircraft operators (who must schedule and bear the inspection) and is issued by CASA under CAR 1998.

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Current sections

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AIRWORTHINESS DIRECTIVE

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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 CAR 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/B737/173 Power Distribution Panels 2/

AD/B737/173 Power Distribution Panels 2/2002

Applicability: Model 737-600, -700, and -800 series aeroplanes, equipped with power distribution panels (PDP) bearing any of the following Boeing part numbers, as listed in the "Existing Part Number'' column of the table under paragraph 2.E., "Existing Parts Accountability,'' of Boeing Service Bulletin (SB) 737-24-1128, dated 29 April 1999.

S281A601-1000	S281A601-1074	S281A601-2003	S281A601-2199
S281A601-1001	S281A601-1108	S281A601-2007	S281A601-2216
S281A601-1002	S281A601-1110	S281A601-2032	S281A601-2217
S281A601-1003	S281A601-1111	S281A601-2038	S281A601-2220
S281A601-1018	S281A601-1120	S281A601-2039	S281A601-2222
S281A601-1020	S281A601-1122	S281A601-2055	S281A601-2226
S281A601-1045	S281A601-1128	S281A601-2057	S281A601-2228
S281A601-1054	S281A601-1162	S281A601-2109	S281A601-2234
S281A601-1055	S281A601-1216	S281A601-2110	S281A601-2275
S281A601-1056	S281A601-2001	S281A601-2111	S281A601-2434
S281A601-1057

Requirement: 1. Unless previously accomplished, perform a one-time general visual inspection to verify proper installation of the power feeder terminals and associated hardware located in power distribution panels (PDP) P91 and P92, in accordance with the following procedures:

Using a flashlight, inspect each of the six power feeder terminals by looking into the access holes located in the plastic cover of the rigid bus assembly. The holes are located on the aft face of PDPs P91 and P92. (Refer to the Boeing 737-600, -700, -800, -900 Aeroplane Maintenance Manual (AMM), Section 24-21-71, Page 402, Figure 401 (Sheet 1), for the location of PDP P91 and P92.) On PDP P91, the holes are adjacent to terminal blocks TB5001 and TB5002. On PDP P92, the holes are adjacent to terminal blocks TB5005 and TB5006. There are a total of six holes per PDP. (Refer to the Boeing 737- 600, -700, -800, -900 AMM, Section 24-21-71, Page 403, Figure 401 (Sheet

2), for the location of the access holes on the PDPs.) Note that although each PDP has nine power feeder terminals, only the six terminals adjacent to the access holes require inspection.

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/B737/173 Power Distribution Panels 2/ AD/B737/173 Power Distribution Panels 2/2002

AD/B737/173 Power Distribution Panels 2/2002

S281A601-1000	S281A601-1074	S281A601-2003	S281A601-2199
S281A601-1001	S281A601-1108	S281A601-2007	S281A601-2216
S281A601-1002	S281A601-1110	S281A601-2032	S281A601-2217
S281A601-1003	S281A601-1111	S281A601-2038	S281A601-2220
S281A601-1018	S281A601-1120	S281A601-2039	S281A601-2222
S281A601-1020	S281A601-1122	S281A601-2055	S281A601-2226
S281A601-1045	S281A601-1128	S281A601-2057	S281A601-2228
S281A601-1054	S281A601-1162	S281A601-2109	S281A601-2234
S281A601-1055	S281A601-1216	S281A601-2110	S281A601-2275