Service difficulty report · Pressure Switch · Boeing 737890

Difficulty date
May 15, 2022
Submitted
May 17, 2022
Operation
Air carrier
Aircraft
N592AS
Make and model
Boeing 737890
Aircraft serial
35190
Aircraft time
51,870 hours, 15,376 cycles
Part
Pressure Switch
Part number
21C1321
Condition
Failed
Location
Right Wing
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

NUMBER 2 AFT FUEL PUMP LOW PRESSURE LIGHT FLICKERING WITH PUMP IN OFF POSITION AND THEN WENT OUT. LOW PRESSURE LIGHT SHOULD REMAIN ON WITH PUMP SWITCH OFF. GROUNDED - YES. TROUBLESHOT #2 AFT BOOST PUMP PRESSURE SWITCH REPLACED PRESSURE SWITCH PER B737-800 AMM 28-42-11-000-801 AND 28-42-11-420-801. OPS CHECK AND GROUND VERIFICATION GOOD. PER AMM 28-42-11-700-801.