SDR EIA2006222

Service difficulty report · Pressure Switch · Boeing 747212B

Difficulty date: September 10, 2006
Submitted: September 27, 2006
Operation: Air carrier
Aircraft: N482EV
Make and model: Boeing 747212B
Aircraft serial: 20713
Aircraft time: 100,012 hours, 23,147 cycles
Engine: Pwa JT9D7A
System (JASC): 7930 · Engine Oil Indicating System
Part: Pressure Switch
Condition: Malfunctioned
Location: Engine Oil
Stage of operation: CR
How discovered: V
Nature of condition: J
Precautionary procedure: A

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

What was found

DURING CRUISE NR 4 ENG OIL PRESS LIGHT CAME ON, NO OTHER SYSTEM MALFUNCTION NOTED, RAN CHECKLIST. LIGHT WENT OUT BUT LATER CAME ON INTERMITTENTLY, DIVERTED TO JFK. REPLACED LOW OIL AND DIFF PRESS SWITCHES, NO HELP. SAME OCCUPANCY NEXT FLIGHT, TIGHTENED TERMINALS ON LIGHT ASSY MOD. SYSTEM DEFERRED AND REQUIRES FURTHER TROUBLESHOOTING.

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