Service difficulty report · Pressure Switch · Boeing 747422

Difficulty date
May 17, 1996
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N173UA
Make and model
Boeing 747422
Aircraft serial
24380
Engine
Pwa PW4056
Part
Pressure Switch
Part number
21SN04389A
Condition
Failed
Location
Nr 1 Engine
Stage of operation
CR
Nature of condition
J
Precautionary procedure
E

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

What was found

NR 1 ENGINE OIL FILTER EICAS MESSAGE, ENGINE SHUT DOWN. *S/D* TE OIL FILTER DELTA PRESSURE SWITCH FAILED. REPLACED SWITCH AND OIL FILTER.