SDR ASAA2016112718847

Service difficulty report · Control Unit · Boeing 737890

Difficulty date: November 27, 2016
Submitted: December 6, 2016
Operation: Air carrier
Aircraft: N557AS
Make and model: Boeing 737890
Aircraft serial: 35176
Aircraft time: 40,097 hours, 11,827 cycles
System (JASC): 2840 · Fuel Indicating System
Part: Control Unit
Part number: 202000104
Condition: Out Of Tolerance
Location: Nr 1 Fuel Tank
Stage of operation: IN
How discovered: C
Nature of condition: L
Precautionary procedure: K

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

What was found

NR 1 MAIN TANK FUEL QTY FAILS SYSTEM TEST, IAW AMM TASK 28-410-00-730-801. ACFT GROUNDED. REPLACED NR 1 TANK UNITS F1, F3, F4, F7, F8, F9, F10 IAW AMM 28-41-21-400-801. FQIS TEST GOOD, NR 1 DRY COMP = 58.00 NR 1 TANK UNITS = 395.7 IAW AMM 28-41-00-730-801.