Service difficulty report · Pressure Switch · Boeing 737823

Difficulty date
December 30, 2024
Submitted
January 2, 2025
Operation
Air carrier
Aircraft
N939NN
Make and model
Boeing 737823
Aircraft serial
33491
Aircraft time
33,029 hours, 13,523 cycles
Engine
Cfmint CFM567B242
Engine time
34,814 hours, 14,854 cycles
Part
Pressure Switch
Part number
QA07995
Condition
Faulted
Location
Nr 2 Engine
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: THE # 2 ENGINE FUEL FILTER BYPASS LIGHT ILLUMINATED FOR TWO MINUTES AFTER TAKEOFF AND REPEATEDLY THROUGHOUT THE FLIGHT. MAINTENANCE REPLACED THE #2 ENGINE FULE FILTER PER AMM 73-11-02 (AALA202501026652) AND THE FUEL FILTER DIFFERENTIAL PRESSURE SWITCH PER AMM 73-34-01. (AALA202501024023) A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED.