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A B757-200 on initial climb at 12000 ft declared an emergency and diverted due to the left hydraulic system loss of pressure and quantity caused by a failed flexible return line on the left main gear down lock actuator.
| Attributes | |
| ACN | 398295 |
| Time | |
| Date | 199803 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 12000 msl bound upper : 12000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dfw tower : dfw |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : initial other other |
| Route In Use | arrival other departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 398295 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 398294 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | other Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
After takeoff from dfw, lost all hydraulic fluid in left system from break in line in left wheel well. Complied with operations manual, including alternate flap and alternate gear extension. Returned dfw for uneventful landing and tow to gate due no steering. Callback conversation with reporter revealed the following information: the reporter stated the aircraft was a B757-200 and the loss of the left hydraulic pressure and quantity was caused by a failed left main gear down lock flexible return line. The reporter said the flexible line was replaced and the system svced. Callback conversation with reporter from acn 393294 revealed the following information: the reporter stated the hydraulic failure was caused by a flexible line in the left wheel well, but did not know the function of the line.
Original NASA ASRS Text
Title: A B757-200 ON INITIAL CLB AT 12000 FT DECLARED AN EMER AND DIVERTED DUE TO THE L HYD SYS LOSS OF PRESSURE AND QUANTITY CAUSED BY A FAILED FLEXIBLE RETURN LINE ON THE L MAIN GEAR DOWN LOCK ACTUATOR.
Narrative: AFTER TKOF FROM DFW, LOST ALL HYD FLUID IN L SYS FROM BREAK IN LINE IN L WHEEL WELL. COMPLIED WITH OPS MANUAL, INCLUDING ALTERNATE FLAP AND ALTERNATE GEAR EXTENSION. RETURNED DFW FOR UNEVENTFUL LNDG AND TOW TO GATE DUE NO STEERING. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ACFT WAS A B757-200 AND THE LOSS OF THE L HYD PRESSURE AND QUANTITY WAS CAUSED BY A FAILED L MAIN GEAR DOWN LOCK FLEXIBLE RETURN LINE. THE RPTR SAID THE FLEXIBLE LINE WAS REPLACED AND THE SYS SVCED. CALLBACK CONVERSATION WITH RPTR FROM ACN 393294 REVEALED THE FOLLOWING INFO: THE RPTR STATED THE HYD FAILURE WAS CAUSED BY A FLEXIBLE LINE IN THE L WHEEL WELL, BUT DID NOT KNOW THE FUNCTION OF THE LINE.
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.