Document ID: chunk:federal_register_of_legislation:F2006B02877:body:0:p1
Version: federal_register_of_legislation:F2006B02877
Segment Type: other
Provision Reference: 
Character Range: 19–3291

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.

 Boeing 737 Series Aeroplanes

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.

               Verify that the power feeder terminal is properly installed and held in place on the busbar by the No. 8 socket head cap screw, and verify that the cap screw is inserted into the hole in the terminal. For the proper power feeder terminal and screw buildup, refer to the Boeing 737-600, -700, -800, -900 AMM,
               Chapter 24-21-71, Page