Service difficulty report · Compensator · Boeing 737890

Difficulty date
December 21, 2021
Submitted
December 23, 2021
Operation
Air carrier
Aircraft
N512AS
Make and model
Boeing 737890
Aircraft serial
39043
Aircraft time
48,018 hours, 14,181 cycles
Part
Compensator
Part number
2020201
Part serial
1428
Condition
Faulty
Location
#1 Main Tank
Part time
19,659 hours, 5,998 cycles
Stage of operation
IN
How discovered
C
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

#1 FQIS FAILS SYSTEM TEST. COMPENSATOR PROBE F15 AND PROBES TU7, TU8, TU10, AND TU11 ARE OUT OF ACCEPTABLE CAPACITANCE VALUES. GROUNDED - YES. REMOVED AND REPLACED #1 FQIS COMPENSATOR PROBE AND PROBES TU7, TU8, TU10, AND TU11. ALL PROBES REPLACED PER B737-800 AMM 28-41-21/401 AND CAPACITANCE VALUES NOW READ GOOD. ALL ITEMS COMPLETE AND CLOSED. LEAK CHECK AND INSPECTION REQUIREMENTS. #1 FQIS OK FOR ETOPS SERVICE. FUEL LOAD BALANCED FOR DISPATCH.