Falcon 10/100
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Flight Instructor; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 50; Flight Crew Total 14000; Flight Crew Type 3000
Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Maintenance
Flight Crew Diverted; Flight Crew Inflight Shutdown; Flight Crew Landed in Emergency Condition; General Maintenance Action
Procedure; Human Factors; Equipment / Tooling; Aircraft
While in cruise we had the left engine oil light illuminate indicating low oil pressure. The oil pressure gauge confirmed the low oil pressure. Following our checklists we shut down the left engine. We requested to change our destination to ZZZ. On about a 10 mile final we realized the airspace was extremely busy and we [advised ATC] in the hope of avoiding the need for a diversion or go-around. We landed at ZZZ without incident. After landing we discovered that the left oil filler/dipstick cap had developed a gap in the O-ring allowing the engine oil to escape. When the O-ring was replaced and the oil replenished; the engine ran fine.
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Falcon 10 flight crew shut down left engine due to low oil pressure. They discovered the O-Ring on the oil filler cap had a gap that allowed oil to escape.