B737 flight crew reported loss of oil pressure and quantity during cruise resulted in engine shut down and divert to a safe landing.
Synopsis
B737 flight crew reported loss of oil pressure and quantity during cruise resulted in engine shut down and divert to a safe landing.
Narrative
While at cruise; the First Officer (FO) noted the number 1 oil quantity was low. At this point it was inverse highlight and 9 percent. Dispatch was notified and was asked to call me" with Maintenance Control. Radio contact was made and the situation was discussed and we continued north towards ZZZ and the discussion of diverting included ZZZ1; ZZZ2; ZZZ3; and ZZZ4. Weather was checked for each of them. Oil quantity steadily and rapidly continued to 0 percent. The pressure began to decline from 41 psi. shortly thereafter. As the oil pressure entered the amber band the auto throttle was disengaged and the thrust reduced and a descent was begun with the intent of diverting to ZZZ2 which was now just over 100 nm on the nose. At this point priority handling was requested for the likelihood of shutting down the engine. When the #1 engine oil pressure went into the red; the checklist for Engine LOW OIL PRESSURE was accomplished which lead to the (NG) Engine Failure or Shutdown checklist. Both were accomplished and the One Engine Inoperative Landing was completed and landing was made on XXR at ZZZ2. Crash Fire Rescue (CFR) observed no physical damage to the #1 engine so we taxied to the gate and shutdown"
Second reporter narrative
After departing from ZZZ5 we climbed to our cruise altitude of 33000 ft. At XA:45 I noticed the oil quantity on the number one engine was indicating 9%. Oil pressure and temperature were not affected at this time. I notified the Captain; and he immediately notified Dispatch over ACARS and began talking with Maintenance Control over the radio. I started gathering weather and diversion airport information. We gathered information for several airport's including ZZZ2; ZZZ1; and ZZZ3. Maintenance told us it might be a sensor issue so we continued northbound. The oil quantity then started decreasing at a steady rate to 0. The Captain and I then reviewed the Engine High Oil Temperature and Engine Low Oil Pressure checklists and the Engine Shutdown checklists in preparation. The pressure started around 41 psi and decreased slowly to around 36 or 37 psi. Shortly after; we began getting fluctuations in oil pressure on the associated engine. The fluctuations occurred in and out of the red and amber bands. At this point we requested priority handling and initiated a descent towards ZZZ2. We then accomplished the Engine Low Oil Pressure checklist followed by the Engine Failure or Shutdown checklist. We then prepared and configured for a one engine inoperative landing; accomplished the One Engine Inoperative Landing checklist and accomplished a safe landing at ZZZ2 on Runway XXR. We came to a stop on the runway where emergency vehicles met and inspected the aircraft. With no observable damage to the aircraft; we determined it was safe to taxi to the gate and perform a normal shutdown.
More incidents for this aircraft family →
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.