SDR U5QA06029

Service difficulty report · O-Ring · Lear 45LEAR

Difficulty date: January 4, 2011
Submitted: January 5, 2011
Operation: Air carrier
Aircraft: N750CR
Make and model: Lear 45LEAR
Aircraft serial: 45123
Aircraft time: 3,464 hours, 2,276 cycles
Engine: Garrtt TFE731*
Engine time: 3,464 hours, 2,276 cycles
System (JASC): 7261 · Turbine Engine Oil System
Part: O-Ring
Condition: Broken
Location: Oil Cap
Stage of operation: CR
How discovered: O
Nature of condition: K, J
Precautionary procedure: E, A

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

What was found

WHILE IN CRUISE, CREW NOTICED CAS MESSAGE L ENGINE OIL PRESSURE. OIL PRESSURE INDICATION WAS IN YELLOW. CREW PERFORMED PRECAUTIONARY ENGINE SHUT DOWN. DIVERTED INTO KAPA. MAINTENANCE DISCOVERED O-RING ON OIL SERVICE CAP WAS BROKEN AND ALLOWED OIL TO VENT OUT OIL TANK.