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An air carrier MD80 flight crew were taxiing out on 1 (left) engine when they noted that the right engine hydraulic pump was inoperative. They returned to the gate area only to realize that the pump would be off because the engine was not running.
| Attributes | |
| ACN | 395200 |
| Time | |
| Date | 199802 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | ground other : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 395200 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
After pushback, we started only 1 engine for taxi. Before leaving the ramp, a check of the hydraulics indicated that the right engine pump was inoperative. We had a similar situation earlier. We told ramp control and ATC that we wanted to return to the gate. We were given instructions to return to the ramp area and hold for a gate. While holding for a gate, we called maintenance and shortly thereafter, a maintenance person came to the airplane. He connected to the interphone system from outside the airplane and I then described our problem. During that conversation, I realized that the reason we had no hydraulic pressure on the right hand system during the check of the hydraulics was because the right engine was not running. The right engine was then started and the hydraulic system indicated normal.
Original NASA ASRS Text
Title: AN ACR MD80 FLC WERE TAXIING OUT ON 1 (L) ENG WHEN THEY NOTED THAT THE R ENG HYD PUMP WAS INOP. THEY RETURNED TO THE GATE AREA ONLY TO REALIZE THAT THE PUMP WOULD BE OFF BECAUSE THE ENG WAS NOT RUNNING.
Narrative: AFTER PUSHBACK, WE STARTED ONLY 1 ENG FOR TAXI. BEFORE LEAVING THE RAMP, A CHK OF THE HYDS INDICATED THAT THE R ENG PUMP WAS INOP. WE HAD A SIMILAR SIT EARLIER. WE TOLD RAMP CTL AND ATC THAT WE WANTED TO RETURN TO THE GATE. WE WERE GIVEN INSTRUCTIONS TO RETURN TO THE RAMP AREA AND HOLD FOR A GATE. WHILE HOLDING FOR A GATE, WE CALLED MAINT AND SHORTLY THEREAFTER, A MAINT PERSON CAME TO THE AIRPLANE. HE CONNECTED TO THE INTERPHONE SYS FROM OUTSIDE THE AIRPLANE AND I THEN DESCRIBED OUR PROB. DURING THAT CONVERSATION, I REALIZED THAT THE REASON WE HAD NO HYD PRESSURE ON THE R HAND SYS DURING THE CHK OF THE HYDS WAS BECAUSE THE R ENG WAS NOT RUNNING. THE R ENG WAS THEN STARTED AND THE HYD SYS INDICATED NORMAL.
Data retrieved from NASA's ASRS site as of July 2007 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.