Service difficulty report · Pressure Switch · Boeing 737823

Difficulty date
December 15, 2025
Submitted
January 6, 2026
Operation
Air carrier
Aircraft
N957AN
Make and model
Boeing 737823
Aircraft serial
29541
Aircraft time
68,558 hours, 29,449 cycles
Part
Pressure Switch
Part number
ASP4560
Condition
Faulty
Location
Zone 100
Stage of operation
NR
How discovered
V
Nature of condition
J
Precautionary procedure
K

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

What was found

AIRCRAFT WAS NOT GROUNDED: TANK 1 AFT FUEL LOW PRESSURE LIGHT DOES NOT ILLUMINATE WHEN THE FUEL PUMP SWITCH IS TURNED OFF. **SUPPLEMENTAL REPORT FOR (AALA202512168333) SUBMITTED 12/16/2025 BY DFW: REMOVED AND REPLACED TANK 1 AFT FUEL PRESSURE SWITCH. PER AMM 28-42-11**(CLOSED).