37000 Feet

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A dash 8 flight crew returned to the gate in response to a left engine low oil pressure warning. Maintenance determined the oil filler cap had not been secured following a previous service.

Narrative:

Taxiing to the runway we noticed a flicker of the red master warning light [then] determined that it was [responding to] the #1 engine low oil pressure light. We contacted ground and asked to return to the gate to have a mechanical problem resolved and the controller started us back up the inner taxiways. As we cleared the active outer taxiways we performed the memory action items for low oil pressure but did not at first need to shut the engine down; as the pressure hovered at first around 55 psi. Later on we needed to stop and shut the engine down as the pressure began to degrade rapidly. We contacted dispatch and maintenance to coordinate a return to gate. We arrived at the gate with no further problems. Maintenance met the aircraft as we deplaned and quickly determined that the oil cap had been left unattached following the last oil service.

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Original NASA ASRS Text

Title: A Dash 8 flight crew returned to the gate in response to a left engine low oil pressure warning. Maintenance determined the oil filler cap had not been secured following a previous service.

Narrative: Taxiing to the runway we noticed a flicker of the red master warning light [then] determined that it was [responding to] the #1 Engine low oil pressure light. We contacted Ground and asked to return to the gate to have a mechanical problem resolved and the Controller started us back up the inner taxiways. As we cleared the active outer taxiways we performed the memory action items for low oil pressure but did not at first need to shut the engine down; as the pressure hovered at first around 55 PSI. Later on we needed to stop and shut the engine down as the pressure began to degrade rapidly. We contacted Dispatch and Maintenance to coordinate a return to gate. We arrived at the gate with no further problems. Maintenance met the aircraft as we deplaned and quickly determined that the oil cap had been left unattached following the last oil service.

Data retrieved from NASA's ASRS site as of July 2013 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.