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An small transport crew had a hydraulic failure on takeoff causing a little concern about the landing gear being down and locked.
| Attributes | |
| ACN | 232464 |
| Time | |
| Date | 199301 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : bna |
| State Reference | TN |
| Altitude | msl bound lower : 2000 msl bound upper : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : bna |
| Operator | common carrier : air carrier |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | climbout : takeoff climbout : initial |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 232464 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Myself and another pilot (the captain) were to pick up an aircraft from maintenance at nashville. All checks were completed and we departed. On takeoff, gear was selected up but stayed in transit. Both hydraulic pumps on the small transport showed 0 pressure when they were normal just before. We declared an emergency and flew a few delaying patterns to run all checklists. We also, after selecting the gear down and getting 3 green, did a fly by the tower to visually inspect the gear. At this point, 1 pump showed normal pressure while the other was at 0 psi. We told the tower controller that we would stop on the runway and made the landing. Just before the landing, both pumps showed normal pressure. On stopping the aircraft on the runway, the maintenance department came out and put gear pins in the landing gear and taxied it in. Inspection of the aircraft found that the system had much air in it. Tighter control on the equipment used by maintenance might help.
Original NASA ASRS Text
Title: AN SMT CREW HAD A HYD FAILURE ON TKOF CAUSING A LITTLE CONCERN ABOUT THE LNDG GEAR BEING DOWN AND LOCKED.
Narrative: MYSELF AND ANOTHER PLT (THE CAPT) WERE TO PICK UP AN ACFT FROM MAINT AT NASHVILLE. ALL CHKS WERE COMPLETED AND WE DEPARTED. ON TKOF, GEAR WAS SELECTED UP BUT STAYED IN TRANSIT. BOTH HYD PUMPS ON THE SMT SHOWED 0 PRESSURE WHEN THEY WERE NORMAL JUST BEFORE. WE DECLARED AN EMER AND FLEW A FEW DELAYING PATTERNS TO RUN ALL CHKLISTS. WE ALSO, AFTER SELECTING THE GEAR DOWN AND GETTING 3 GREEN, DID A FLY BY THE TWR TO VISUALLY INSPECT THE GEAR. AT THIS POINT, 1 PUMP SHOWED NORMAL PRESSURE WHILE THE OTHER WAS AT 0 PSI. WE TOLD THE TWR CTLR THAT WE WOULD STOP ON THE RWY AND MADE THE LNDG. JUST BEFORE THE LNDG, BOTH PUMPS SHOWED NORMAL PRESSURE. ON STOPPING THE ACFT ON THE RWY, THE MAINT DEPT CAME OUT AND PUT GEAR PINS IN THE LNDG GEAR AND TAXIED IT IN. INSPECTION OF THE ACFT FOUND THAT THE SYS HAD MUCH AIR IN IT. TIGHTER CTL ON THE EQUIP USED BY MAINT MIGHT HELP.
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.