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Flight crew of an air carrier medium large transport aircraft declared an emergency after loosing all hydraulic system during descent for landing.
| Attributes | |
| ACN | 241788 |
| Time | |
| Date | 199305 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : mmex |
| State Reference | FO |
| Altitude | msl bound lower : 17000 msl bound upper : 17000 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | enroute airway : mmex |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 19000 flight time type : 250 |
| ASRS Report | 241788 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 120 flight time total : 6000 flight time type : 120 |
| ASRS Report | 241535 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | faa : investigated Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
Total hydraulic failure due to failure of power transfer unit. Callback conversation with reporter revealed the following information: reporter stated that the type of aircraft and related hydraulic system being inoperative resulted in a touchdown speed of approximately 225 KTS! Since most aircraft flight controls are hydraulic, the rudder was moved manually. The reporter further stated that he had the opportunity to practice 'clean' lndgs recently in the company simulator which helped him with this night time emergency. There was only approximately 1200 ft left of a 12800 ft runway. Since the aircraft could not taxi due to no brakes or nosewheel steering, the passenger were deplaned on the runway. No one was injured and the aircraft stayed on the runway for 5 hours. Investigation disclosed that the hydraulic transfer pump exploded rendering the total system out with no fluid. The part was found to be defective from the factory.
Original NASA ASRS Text
Title: FLC OF AN ACR MLG ACFT DECLARED AN EMER AFTER LOOSING ALL HYD SYS DURING DSCNT FOR LNDG.
Narrative: TOTAL HYD FAILURE DUE TO FAILURE OF PWR TRANSFER UNIT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT THE TYPE OF ACFT AND RELATED HYD SYS BEING INOP RESULTED IN A TOUCHDOWN SPD OF APPROX 225 KTS! SINCE MOST ACFT FLT CTLS ARE HYD, THE RUDDER WAS MOVED MANUALLY. THE RPTR FURTHER STATED THAT HE HAD THE OPPORTUNITY TO PRACTICE 'CLEAN' LNDGS RECENTLY IN THE COMPANY SIMULATOR WHICH HELPED HIM WITH THIS NIGHT TIME EMER. THERE WAS ONLY APPROX 1200 FT LEFT OF A 12800 FT RWY. SINCE THE ACFT COULD NOT TAXI DUE TO NO BRAKES OR NOSEWHEEL STEERING, THE PAX WERE DEPLANED ON THE RWY. NO ONE WAS INJURED AND THE ACFT STAYED ON THE RWY FOR 5 HRS. INVESTIGATION DISCLOSED THAT THE HYD TRANSFER PUMP EXPLODED RENDERING THE TOTAL SYS OUT WITH NO FLUID. THE PART WAS FOUND TO BE DEFECTIVE FROM THE FACTORY.
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.