Dash 8-200
Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Distraction; Troubleshooting; Workload
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew FLC complied w / Automation / Advisory; Flight Crew Diverted; Flight Crew Inflight Shutdown; Flight Crew Landed in Emergency Condition; General Declared Emergency; General Maintenance Action
Aircraft; Procedure
Enroute suffered an oil pressure loss on the Number 1 Engine requiring it to be shut down. Prior to flight the Number 1 Engine was written up due to oil leaking out of Number 1 Engine nacelle. Contract Maintenance found the leak but was unable to determine the source. Company Maintenance was contacted and they came to the outstation and repaired and replaced the flexible drain line to the inboard nacelle. Operations check good and the Mechanic signed off. The aircraft was put back into service.The takeoff and climb portion of the flight were normal; however during the cruise portion of flight approaching the oil press indicator began to fluctuate. The indication was showing approximately 58 PSI and the Captain contacted Dispatch. The oil pressure continued to decrease and the Abnormal Oil Pressure Checklist was utilized. Reaching 55 PSI we brought the power to flight idle and to reduce drag brought the condition lever to start/feather. The Oil Pressure Warning light came on and stayed on and we shut the engine down using all appropriate steps and checklists. We declared an emergency and determined that a nearby airport would be the best suitable airport to divert to in a coordinated effort with Dispatch. The Flight Attendant was notified of the situation. [We] landed with no further incidents. In order for this to not happen again there needs to be a better way of determining why an engine has lost oil. The mechanical procedure used to identify the source of the oil leak; and as a result engine failure in flight; by the maintenance personnel was not sufficient. Clearly the methods used did not fix the problem and as a result placed the crew and aircraft in an unsafe situation.
[Narrative #2 contained no additional information.]
A DHC-8-100 Number 1 Engine oil pressure dropped at cruise so the engine was shutdown; the QRH completed; an emergency declared and the flight diverted to a nearby airport. Prior to flight maintenance was performed for an oil leak.