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MD80 left hydraulic pump failed after takeoff. Flight crew returned to departure airport; declaring emergency for overweight condition.
| Attributes | |
| ACN | 756949 |
| Time | |
| Date | 200710 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 7000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 756949 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 756950 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : diverted to another airport flight crew : landed as precaution flight crew : declared emergency |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Aircraft landing weight was 140000 pounds. Climbing out; passing through 7000 ft; first officer observed both left and right hydraulic pressure indicators pulsating. Turned off xfer pump and noted that left hydraulic pressure dropped to zero and 'left hydraulic press low' light illuminated. Ran 'left/right hydraulic pressure low light' abnormal checklist. Noted no loss of hydraulic fluid and xfer pump was working normally. Informed center that we needed to return to ZZZ for an aircraft system problem. Due to an anticipated overweight landing; declared an emergency and requested arff. Normal approach and landing on runway. Arff checked aircraft for leaks. None noted; taxied to gate under own power.
Original NASA ASRS Text
Title: MD80 LEFT HYD PUMP FAILED AFTER TKOF. FLT CREW RETURNED TO DEP ARPT; DECLARING EMER FOR OVERWEIGHT CONDITION.
Narrative: ACFT LNDG WT WAS 140000 LBS. CLBING OUT; PASSING THROUGH 7000 FT; FO OBSERVED BOTH L AND R HYD PRESSURE INDICATORS PULSATING. TURNED OFF XFER PUMP AND NOTED THAT L HYD PRESSURE DROPPED TO ZERO AND 'L HYD PRESS LOW' LIGHT ILLUMINATED. RAN 'L/R HYD PRESSURE LOW LIGHT' ABNORMAL CHKLIST. NOTED NO LOSS OF HYD FLUID AND XFER PUMP WAS WORKING NORMALLY. INFORMED CTR THAT WE NEEDED TO RETURN TO ZZZ FOR AN ACFT SYS PROB. DUE TO AN ANTICIPATED OVERWT LNDG; DECLARED AN EMER AND REQUESTED ARFF. NORMAL APCH AND LNDG ON RWY. ARFF CHKED ACFT FOR LEAKS. NONE NOTED; TAXIED TO GATE UNDER OWN PWR.
Data retrieved from NASA's ASRS site as of January 2009 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.