Service difficulty report · Pressure Switch · Boeing 737890

Difficulty date
September 1, 2023
Submitted
September 6, 2023
Operation
Air carrier
Aircraft
N560AS
Make and model
Boeing 737890
Aircraft serial
35179
Aircraft time
61,693 hours, 18,639 cycles
Part
Pressure Switch
Part number
21C1321
Condition
Faulty
Location
Rh Aft Fuel Boos
Stage of operation
IN
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

TECH SERVICES REQUEST FOLLOW UP TO HISTORY OF #2 TANK AFT PUMP LOW PRESSURE LIGHT NOT ILLUMINATING----(#PRI1)----ETOPS SIGNIFICANT SYSTEM---- GROUNDED - YES. (RESOLVED ON W/O: 1965830 TASKCARD: N/R-00002 ) INSPECTION / CIC APPLICATION OF RH AFT FUEL PUMP LOW PRESSURE SWITCH CONNECTOR ACCOMPLISHED PER AMM 28-42-11-211-802. NO DEFECTS NOTED. SWITCH CIRCUITRY INDICATED HIGH RESISTANCE. RH AFT FUEL BOOST PUMP PRESSURE SWITCH REMOVED AND REPLACED PER AMM 28-42-11-000-801 AND 28-42-11-420-801. THREE MIG-51A TAGS INSTALLED AND REMOVED. OPERATIONAL TESTS PASS PER AMM 28-42-11-700-801. SEAMC SCOTT NOTIFIED.