Service difficulty report · Pressure Switch · Boeing 737890

Difficulty date
April 1, 2022
Submitted
April 5, 2022
Operation
Air carrier
Aircraft
N531AS
Make and model
Boeing 737890
Aircraft serial
35199
Aircraft time
41,907 hours, 12,125 cycles
Part
Pressure Switch
Part number
21C1321
Condition
Faulty
Location
R Wing Rear Spar
Stage of operation
TX
How discovered
V
Nature of condition
P
Precautionary procedure
K

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

What was found

DURING PREFLIGHT - WITH MAIN TANK FUEL PUMP "OFF" - TANK #2 "LOW PRESSURE" LIGHT WAS OUT. GROUNDED - YES. R/R AFT BOOST PUMP PRESSURE SWITCH IAW B737-800 AMM 28-42-11 OP/LEAK CHECK GOOD.