Service difficulty report · Pressure Switch · Boeing 737990ER

Difficulty date
August 9, 2021
Submitted
August 14, 2021
Operation
Air carrier
Aircraft
N469AS
Make and model
Boeing 737990ER
Aircraft serial
41702
Aircraft time
26,471 hours, 8,535 cycles
Part
Pressure Switch
Part number
21C1322
Condition
Inoperative
Location
Boost Pump
Stage of operation
IN
How discovered
9
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

REF TSRA711045 RIGHT CENTER PUMP BOOST PUMP REMOVAL/REPLACEMENT, FOUND LOW PRESSURE LIGHT ON AFTER REPLACEMENT OF PUMP. PERFORMED B737-900 FIM 28-22 TASK 802 AND FOUND LOW PRESSURE SWITCH S155 INOP. GROUNDED - YES. REMOVED AND REPLACED RIGHT CENTER PRESSURE SWITCH REF B737-900 AMM 28-42-11 OPS CHECK GOOD.