AD/B737/62 Amdt 1 - Main Fuel Tank Float Switch Electrical Harness (Cth)

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

Boeing 737 Series Aeroplanes

AD/B737/62 Amdt 1

Main Fuel Tank Float Switch Electrical Harness 2/94

Applicability: All model 737 series aeroplanes identified in Boeing Service Letters 737-SL-28-36 and 737-SL-28-42 dated 30 November 1990 and 15 December 1992 respectively.

Requirement: 1. For aircraft identified in Service Letter 737-SL-28-36 inspect the wing main tank float switch electrical conduit for fuel leaks and condensation build up in accordance with the Service Letter 737-SL-28-36. If evidence of fuel leakage or water condensation is found then, before the next flight, purge and install a new vapour seal assembly in accordance with the Service Letter.

2. For aircraft identified in Service Letter 737-SL-28-42 inspect the wing main tank float switch electrical conduit for fuel leaks and condensation build up in accordance with the Service Letter 737-SL-28-36. If evidence of fuel leakage or water condensation is found then, before the next flight, purge and install a new vapour seal assembly in accordance with Service Letter 737-SL-28-36.

3. Fill the interior of the wing main tank float switch electrical conduits with grease in accordance with either:

1. Boeing Service Letter 737-SL-28-42 dated 15 December 1992,

b. Boeing Service Letter 737-SL-28-42A dated 15 July 1993; or

c. Ansett Airlines Engineering Release B73-28-10-6B.

Note: FAA AD 93-17-02 Amdt 39-8672 refers.

Compliance: 1 - The Compliance was originally prior to 7 February 1992, and thereafter at intervals not exceeding 1500 hours time in service.