Service difficulty report · Pressure Switch · Boeing 737823

Difficulty date
April 11, 2026
Submitted
April 14, 2026
Operation
Air carrier
Aircraft
N960AN
Make and model
Boeing 737823
Aircraft serial
29542
Aircraft time
70,555 hours, 30,015 cycles
Part
Pressure Switch
Part number
21C1321
Condition
Low Pressure
Location
Zone 100
Stage of operation
NR
How discovered
O
Nature of condition
J
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: AFT FUEL PUMP LOW PRESSURE LIGHT ILLUMINATED WHEN TURNED ON. LEFT MAIN TANK AFT BOOST PUMP INOPERATIVE. REMOVE AND REPLACED NUMBER 1 AFT FUEL PUMP LOW PRESSURE SWITCH. PER AMM 28-42-11. OPS CHECK GOOD. LEAK CHECK GOOD.