Service difficulty report · Pressure Switch · Boeing 767322

Difficulty date
June 19, 2011
Submitted
July 14, 2011
Operation
Air carrier
Aircraft
N670UA
Make and model
Boeing 767322
Aircraft serial
29240
Aircraft time
42,484 hours, 11,143 cycles
Engine
Pwa PW4056
Part
Pressure Switch
Part number
21SN04461
Part serial
185
Condition
Faulty
Location
Nr 2 Engine
Stage of operation
IN
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

NR 2 ENGINE OIL FILTER MSG. REPLACED THE MAIN OIL FILTER. REPLACED THE OIL FILTER DIFFERENTIAL PRESSURE SWITCH PER AMM. FBO REPLACED OIL FILTER DIFFERENTIAL PRESSURE SWITCH PER AMM. NR 2 ENGINE WILL REQUIRE IDLE RUN LEAK CHECK DUE TO MAIN OIL FILTER REPLACEMENT. SAMC TEXT: ALSO DURING IDLE RUN LEAK CHECK, CHECK OIL FILTER DIFFERENTIAL PRESSURE SWITCH FOR LEAKS, DUE TO SWITCH REPLACED. DURING RUN, VERIFY THERE ARE NO OIL FILTER LIGHTS OR MSGS. RAN NR 2 ENGINE PER JRH 2-6-1. CLOSED COWLINGS PER AMM. RAN NR 2 ENGINE PER JRH 2-6-1. OPENED COWLING AND VERIFIED NO LEAKS.