SDR ASAA2018091326109

Service difficulty report · Unknown · Boeing 737990ER

Difficulty date: September 11, 2018
Submitted: September 13, 2018
Operation: Air carrier
Aircraft: N472AS
Make and model: Boeing 737990ER
Aircraft serial: 60580
Aircraft time: 13,885 hours, 4,575 cycles
System (JASC): 2840 · Fuel Indicating System
Part: Unknown
Condition: Malfunctioned
Location: Fuel System
Stage of operation: NR
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

WHILE ENROUTE FROM HNL TO SJC, JUST PASSED ETOPS CP, NR 2 FUEL GAUGE OSCILLATED BETWEEN QTY'S OF 8.56 & 8.36 DOWN BACK UP. ALL PUMPS ON & CROSSFEED CLOSED. GROUNDED - YES. PERFORMED BITE TEST FOR FQIS. NO FAULTS NOTED. PERFORMED GROUND TEST ON FQIS, "GROUND COMPLETED AND PASS" PER REF AMM TASK 28-41-00-710-801. CONFIRMED FUEL QTY ON NR 2 WING IND MATCHES W/ FLT DECK QTY IND FOR NR 2 PER FIM 28-41 TASK 814.