SDR TWRA9850

Service difficulty report · Switch · Boeing 747124

Difficulty date
August 29, 1998
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N602FF
Make and model
Boeing 747124
Aircraft serial
19734
Part
Switch
Part number
65B821062
Condition
Malfunctioned
Location
Load Limiter
Stage of operation
DE
Nature of condition
L
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING FUEL DUMP, NR 3 MAIN JETTISON PUMP PRESSURE LIGHT REMAINED ON WITH BOTH PUMPS ON. DUMP RATE FROM NR 3 WAS ONE-HALF (50 PERCENT) BELOW NR 2 MAIN. REQUIRED TO CLOSE NR 2 JETTISON PUMP TO MAINTAIN BALANCE. REF: ATB AILERON PROBLEM. CHECKED WIRING OF NR 3 MAIN INBOARD AND OUTBOARD FUEL JETTISON PUMPS CIRCUITS PER WDM 28 42 12 AND 26 31 21. RE-SECURED LOOSE PRESSURE SWITCH CONNECTION ON NR 3 INBD PUMP. OPS CHECK NORMAL. MM REF 38 31 00. (X)