Service difficulty report · Pressure Switch · Boeing 747422

Difficulty date
May 2, 2012
Submitted
June 30, 2012
Operation
Air carrier
Aircraft
N127UA
Make and model
Boeing 747422
Aircraft serial
28813
Aircraft time
50,933 hours, 6,012 cycles
Engine
Pwa PW4056
Part
Pressure Switch
Condition
Failed
Location
Nr 2 Idg
Stage of operation
NR
How discovered
9
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

'ELEC IDG 2 VALVE' EICAS STATUS MESSAGE DISPLAYED. REPLACED IDG AIR OIL COOLER OVERRIDE PRESSURE SWITCH.