Service difficulty report · Pressure Switch · Boeing 737823

Difficulty date
May 15, 2026
Submitted
May 21, 2026
Operation
Air carrier
Aircraft
N901NN
Make and model
Boeing 737823
Aircraft serial
33226
Aircraft time
40,234 hours, 17,389 cycles
Engine
Cfmint CFM567B24E
Part
Pressure Switch
Part number
8TJ201NAA1
Condition
Faulty
Location
Zone 400
Stage of operation
TO
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 NOT GROUNDED: FUEL FILTER BYPASS CAUTION LIGHT AFTER TAKE OFF. LIGHT IS INTERMITTENT. REMOVED AND REPLACE NUMBER 2 ENGINE FUEL FILTER (AALA202605209972), PER MM 73-11-02. ALSO, REMOVED AND REPLACED FUEL FILTER DIFFERENTIAL PRESSURE SWITCH (AALA202605205803), PER MM 73-34-01. RAN ENGINE ALL PARAMETERS NORMAL AND LEAK CHECK GOOD.