AD/B747/187 - Centre Wing Fuel Tank Scavenge Pump (Cth)

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

Boeing 747 Series Aeroplanes

AD/B747/187 Centre Wing Fuel Tank Scavenge Pump 10/98

DM

Applicability: Model 747 series aeroplanes line positions 001 through 971 inclusive.

Requirement: 1. Unless previously accomplished, perform a one time inspection to determine the part number (P/N) of the installed scavenge pump motor-impeller unit in accordance with Boeing Alert Service Bulletin (ASB) 747-28A2215 dated 14 May 1998. If the P/N is neither Boeing P/N 60B92403-5 nor Lear Romec P/N RR24680 no further action is required.

2. If the P/N is either Boeing P/N 60B92403-5 or Lear Romec P/N RR24680 either:

1. Replace the scavenge pump with a new or serviceable pump having P/N 60B92403-12, -13 or -18 (Intertechnique); or with a new or serviceable pump having P/N 60B92403-51 (Lear Romec).

or

b. Deactivate the scavenge pump. The aeroplane may be operated with the scavenge pump deactivated in accordance with the provisions and limitations specified in the operator's approved Master Minimum Equipment List.

Note: Boeing ASB 747-28A2215, refers to the 747 Dispatch Deviation Guide as another source for deactivation of the scavenge pump.

3. Scavenge pumps with either Boeing P/N 60B92403-5 or Lear Romec P/N RR24680 are not be installed on any aeroplane to replace an existing unit.

Note: FAA AD 98-14-17 Amdt 39-10650 refers.

Compliance: 1. Within 60 days after the effective date of this directive.

2. Before further flight after the Requirement 1 inspection.

3. As of the effective date of this directive.