SDR ASAA2022011037112

Service difficulty report · Compensator · Boeing 737890

Difficulty date: January 10, 2022
Submitted: January 22, 2022
Operation: Air carrier
Aircraft: N535AS
Make and model: Boeing 737890
Aircraft serial: 35200
Aircraft time: 40,168 hours, 11,510 cycles
System (JASC): 2840 · Fuel Indicating System
Part: Compensator
Part number: 2020201
Part serial: 8844
Condition: Out Of Limits
Location: #2 Main Tank
Part time: 42,036 hours, 13,571 cycles
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

#2 FQIS FAILS SYSTEM TEST. THE FOLLOWING PROBES ARE OUT OF ACCEPTABLE CAPACITANCE VALUES PER AMM TASK 28-41-21-710-801: COMP., TU4, TU5, TU6, TU7, AND TU8. GROUNDED - YES. REMOVED AND REPLACED COMP PROBE, TU4 AND TU6 PROBES REF B737-800 AMM 28-41-21/401. REPLACED PROBE TU5 PER AMM 28-41-21. REMOVED AND REPLACED TU7 AND TU8 REF AMM 28-41-21/401. ACCOMPLISHED FUEL QUANTITY IND SYS TEST, OPS NML REF AMM 28-41-00-730-801.