Service difficulty report · Transfer Sys · Boeing 737823

Difficulty date
September 18, 2025
Submitted
September 23, 2025
Operation
Air carrier
Aircraft
N821NN
Make and model
Boeing 737823
Aircraft serial
30912
Aircraft time
46,917 hours, 19,845 cycles
Part
Transfer Sys
Condition
No Discrepancy
Location
Zone 100
Stage of operation
CR
How discovered
O
Nature of condition
N
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 GROUNDED: DURING CRUISE FUEL IN WOULD MOVE INTO THE CENTER TANKS WHILE FUEL PUMPS WERE OFF. NO EVIDENCE OF FUEL MIGRATION AT THIS TIME, NO FAULT FOUND. PER FIM 28-21-00-810-812.