Service difficulty report · Densitometer · Boeing 747422

Difficulty date
July 8, 2010
Submitted
July 9, 2010
Operation
Air carrier
Aircraft
N171UA
Make and model
Boeing 747422
Aircraft serial
24322
Aircraft time
78,249 hours, 9,353 cycles
Engine
Pwa PW4056
Part
Densitometer
Part number
10065500002
Part serial
33
Condition
Malfunctioned
Location
Fuel System
Stage of operation
IN
How discovered
O
Nature of condition
O
Precautionary procedure
K

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

What was found

INTERMITTENT BLANKING OF THE NR 4 MAIN FUEL QTY IND AND TOTALIZER. NO TOTAL FUEL. NO CMC FUEL DISPLAY. NO KNOWLEDGE OF FUEL QTY MAIN TANK NR 4 QTY INDICATION INOP. ACP'D MEL 2841AC. REPLACED FUEL QUANTITY DENSITOMETER IN REF TO MM. GROUND - BITE CHECK PASSED.