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B737 flight crew reported a loss of oil quantity which resulted in an engine shutdown; and a successful diversion to a suitable airport.
| Attributes | |
| ACN | 1529305 |
| Time | |
| Date | 201803 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Powerplant Lubrication System |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 521 Flight Crew Type 17000 |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 394 Flight Crew Type 450 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Our flight experienced a dramatic oil loss at 36;000 feet. Oil quantity gauge went from 80 percent to 0 in about 25 minutes. We called dispatch and explained the situation and they patched us to maintenance control. They informed us that it was most likely the gauge and if no amber or red lights appeared; then that was what was occurring. We continued on to [our destination] and monitored it very carefully. About ten minutes later we both notice the oil pressure also going from 39 percent to 36 percent but stable indicators and still no lights. As the oil pressure depleted to around 20 percent and a flash of amber on the engine control; we decided to make a precautionary landing [at an alternate airport]. ATC cleared us direct and descend to 12;000 feet. Disconnected the autothrottles and pulled the power to idle as not to strain the motor. Check list was pulled and followed for a possible single engine landing. The first officer; online four months; did a great job. We informed the flight attendants and passengers that we were landing [at the alternate airport] as a precaution. 10 miles on final approach; the red light came on and we [advised ATC] and shut the motor down. We landed single engine with no other issues.
Original NASA ASRS Text
Title: B737 flight crew reported a loss of oil quantity which resulted in an engine shutdown; and a successful diversion to a suitable airport.
Narrative: Our flight experienced a dramatic oil loss at 36;000 feet. Oil Quantity Gauge went from 80 percent to 0 in about 25 minutes. We called Dispatch and explained the situation and they patched us to Maintenance Control. They informed us that it was most likely the gauge and if no amber or red lights appeared; then that was what was occurring. We continued on to [our destination] and monitored it very carefully. About ten minutes later we both notice the oil pressure also going from 39 percent to 36 percent but stable indicators and still no lights. As the oil pressure depleted to around 20 percent and a flash of amber on the engine control; we decided to make a precautionary landing [at an alternate airport]. ATC cleared us direct and descend to 12;000 feet. Disconnected the autothrottles and pulled the power to idle as not to strain the motor. Check list was pulled and followed for a possible single engine landing. The First Officer; online four months; did a great job. We informed the Flight Attendants and passengers that we were landing [at the alternate airport] as a precaution. 10 miles on final approach; the red light came on and we [advised ATC] and shut the motor down. We landed single engine with no other issues.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.