Service difficulty report · Pressure Switch · Boeing 737990ER

Difficulty date
February 21, 2022
Submitted
March 17, 2022
Operation
Air carrier
Aircraft
N413AS
Make and model
Boeing 737990ER
Aircraft serial
35205
Aircraft time
33,445 hours, 10,641 cycles
Part
Pressure Switch
Part number
21C1321
Condition
Inoperative
Location
R Wing Rear Spar
Stage of operation
NR
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

R/H AFT FUEL PUMP LOW PRESSURE LT DOES NOT ILLUMINATE WITH SWITCH IN OFF POSITION. GROUNDED - YES. REMOVED AND REPLACED RIGHT AFT BOOST PUMP (FUEL) PRESSURE SWITCH , OPS CHECK GOOD AND GROUND VERIFICATION SUCCESSFUL REF B737-900 AMM 28-42-11.