Service difficulty report · Pressure Switch · Boeing 737890

Difficulty date
June 5, 2010
Submitted
June 11, 2010
Operation
Air carrier
Aircraft
N570AS
Make and model
Boeing 737890
Aircraft serial
35185
Aircraft time
12,687 hours, 3,701 cycles
Part
Pressure Switch
Part number
21C1321
Condition
Corroded
Location
Lt Fuel Tank
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

LEFT AFT FUEL PRESSURE LIGHT ILLUMINATED (INFO ONLY ALTITUDE 350 / TEMP 46 / 1+45 HRS AFTER T/O / TRB SMOOTH). FOUND CONN D868 TO LT BP LOW PRESS SWITCH WITH SIGNS OF MOISTURE AND CORROSION ON SOCKETS AND LOW PRESS SW HAS SIGNS OF MOISTURE AROUND BASE OF PINS. REPLACED CONN D868 AND SOCKETS REF SWPM 20 61 11 AND WDM 28 43 11, REPLACED LT TANK AFT LOW PRESS SWITCH PER MM 28 42 11. TESTS GOOD PER SAME.