AD/B737/139 - Wire Bundle Chafing - Electric Motor Driven Hydraulic Pump (Cth)

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

Boeing 737 Series Aeroplanes

AD/B737/139 Wire Bundle Chafing - Electric Motor Driven Hydraulic Pump

3/2000

Applicability: Model 737-300, -400, and -500 series aeroplanes, as listed in Boeing Alert Service (ASB) Bulletin 737-29A1076, Revision 1, dated 21 October 1999; and Model 737- 600, -700, and -800 series aeroplanes, as listed in Boeing ASB 737-29A1077, Revision 1, dated 21 October 1999.

Requirement: 1. For Model 737-300, -400, and -500 series aeroplanes:

1. Without Boeing ASB 737-29A1076 dated 2 April 1998 accomplished - Perform a one-time detailed visual inspection of wire bundle W0334 and the hydraulic case drain and pressure hoses for the electric motor driven pump (EMDP) for hydraulic system "B" to detect any discrepancy (e.g. damage or chafing of wire bundle W0334 and the hydraulic case drain and pressure hoses; and incorrect separation between those components), in accordance with Part 1 of the Accomplishment Instructions of Boeing ASB 737-29A1076, Revision 1, dated 21 October 1999.

b. With Boeing ASB 737-29A1076 dated 2 April 1998 accomplished - Perform a one-time detailed visual inspection of wire bundle W0334 and the hydraulic case drain and pressure hoses for the EMDP for hydraulic system "B" to detect any discrepancy (e.g. damage or chafing of wire bundle W0334 and the hydraulic case drain and pressure hoses; and incorrect separation between those components), in accordance with Part 2 of the Accomplishment Instructions of Boeing 737-29A1076, Revision 1, dated 21 October 1999.

2. If any discrepancy is found, during the Requirement 1.a. inspection, perform corrective actions in accordance with Part 1 of the Accomplishment Instructions of ASB 737-29A1076, Revision 1.