Service difficulty report · Transmitter · Boeing 777223

Difficulty date
April 10, 2019
Submitted
April 15, 2019
Operation
Air carrier
Aircraft
N773AN
Make and model
Boeing 777223
Aircraft serial
29583
Aircraft time
80,965 hours, 10,107 cycles
Part
Transmitter
Part number
921762
Part serial
Y85
Condition
Inaccurate
Location
Rt Wing Fuel
Stage of operation
CR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

AIRCRAFT WAS NOT GROUNDED: FLIGHT CREW REPORTS BELIEVED THAT CALCULATED FUEL WAS INCORRECT. FUEL TOTALIZER AND FUEL CALCULATED NUMBERS SHOWED A DIFFERENCE OF 6000' THROUGHOUT THE FLIGHT. NO EICAS MSG. TOTALIZER WAS MORE THAN CALCULATED. CONTINUED FROM LAST BLOCK. LEFT SIDE FUEL FLOW SHOWED ABOUT 700PPH LESS THAN THE RIGHT SIDE DURING CRUISE (7.3 VS 8.0). APPEARS RIGHT FUEL FLOW IS INDICATING MORE THAN ACTUAL FUEL FLOW BURN BY ENGINE. MAINTENANCE REMOVED AND REPLACED THE R/H FUEL FLOW TRANSMITTER IAW CARD 73-31-11.