SDR 99ZZZM417

Service difficulty report · Switch · Lkheed 10113851

Difficulty date: June 22, 1999
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N196AT
Make and model: Lkheed 10113851
Aircraft serial: 193B1076
System (JASC): 7930 · Engine Oil Indicating System
Part: Switch
Condition: Shorted
Location: Nr 1 Engine
Stage of operation: CR
Nature of condition: N
Precautionary procedure: E, A

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

What was found

DURING CRUISE, THE NR 1 ENGINE FILTER PRESSURE LIGHT ILLUMINATED, ACCOMPLISHED PRECAUTIONARY ENGINE SHUTDOWN. DIVERTED TO IND. DURING TROUBLESHOOTING FOUND SCAVENGE PRESSURE DIFFERENTIAL SWITCH MAKES CONTRACT UNDER VIBRATION. REPLACED MAIN OIL FILTER PRESSURE AND SCAVENGE DIFFERENTIAL/PRESSURE SWITCHES, OPS CHECK GOOD. CANNON PLUG FOR THE NR 1 ENGINE PRESSURE LIGHT FOUND TO BE BAD. REPLACED CANNON PLUG, OPS CHECK GOOD. (M)