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A B767-200 has to return land when the left landing gear retraction cylinder failed during its retraction cycle departure slc, ut.
| Attributes | |
| ACN | 457965 |
| Time | |
| Date | 199912 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : slc.airport |
| State Reference | UT |
| Altitude | agl single value : 300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : slc.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B767-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer observation : company check pilot oversight : pic |
| Qualification | pilot : multi engine pilot : instrument pilot : flight engineer pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 200 flight time total : 21000 flight time type : 5000 |
| ASRS Report | 457965 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain instruction : trainee |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 70 flight time total : 15000 flight time type : 0.5 |
| ASRS Report | 457966 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa other flight crewb other other : 3 |
| Resolutory Action | flight crew : declared emergency flight crew : landed in emergency condition other |
| Consequence | other other other other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
On takeoff from slc we heard a loud bang just as the landing gear came up. All aircraft indications were normal. However, because we suspected a landing gear problem we lowered the gear to determine its status. Upon lowering the gear we had green lights in the nose gear and right main and unsafe indications on the left gear. Upon turning around to the airport, we experienced a violent shudder and 10 degrees of bank and yaw. We made a fly-by of the tower and were told by the tower and our mechanics that all of the gear appeared down. Because we did not have a down and locked indication, we declared an emergency and prepared the cabin for the possibility the gear would collapse on landing. We discussed with our maintenance coordinator about using our alternate gear extension procedure, but concluded it was not appropriate because the gear was already out of the well. We made an ILS approach and normal landing, although I favored the right side of the runway. The landing was normal except I felt a slight bumping on the left gear as we rolled out. When maintenance inspected the gear they found the retraction cylinder had sheared (probably just as the gear was fully retracted on takeoff, therefore the loud noise). We believe the violent shudder we felt was when the gear, which had apparently been stuck in the well, fell out. The overctr hydraulic cylinders were bent, not allowing the gear pins to be installed. My CRM training was very useful in managing this situation, which was not a 'textbook' case. Everyone we talked to contributed some information which I was able to use to make appropriate decisions. Supplemental information from acn 457966: this was my first flight in the B767, and an IOE flight. A qualified first officer took the right seat and the IOE check captain took the left seat. I assumed the jump seat. A decision was made to lower the gear. The nose gear and right main gear indicated down. The left main gear was not down. During a turn back to slc the left main gear dropped down (still no down and locked indication).
Original NASA ASRS Text
Title: A B767-200 HAS TO RETURN LAND WHEN THE L LNDG GEAR RETRACTION CYLINDER FAILED DURING ITS RETRACTION CYCLE DEP SLC, UT.
Narrative: ON TKOF FROM SLC WE HEARD A LOUD BANG JUST AS THE LNDG GEAR CAME UP. ALL ACFT INDICATIONS WERE NORMAL. HOWEVER, BECAUSE WE SUSPECTED A LNDG GEAR PROB WE LOWERED THE GEAR TO DETERMINE ITS STATUS. UPON LOWERING THE GEAR WE HAD GREEN LIGHTS IN THE NOSE GEAR AND R MAIN AND UNSAFE INDICATIONS ON THE L GEAR. UPON TURNING AROUND TO THE ARPT, WE EXPERIENCED A VIOLENT SHUDDER AND 10 DEGS OF BANK AND YAW. WE MADE A FLY-BY OF THE TWR AND WERE TOLD BY THE TWR AND OUR MECHS THAT ALL OF THE GEAR APPEARED DOWN. BECAUSE WE DID NOT HAVE A DOWN AND LOCKED INDICATION, WE DECLARED AN EMER AND PREPARED THE CABIN FOR THE POSSIBILITY THE GEAR WOULD COLLAPSE ON LNDG. WE DISCUSSED WITH OUR MAINT COORDINATOR ABOUT USING OUR ALTERNATE GEAR EXTENSION PROC, BUT CONCLUDED IT WAS NOT APPROPRIATE BECAUSE THE GEAR WAS ALREADY OUT OF THE WELL. WE MADE AN ILS APCH AND NORMAL LNDG, ALTHOUGH I FAVORED THE R SIDE OF THE RWY. THE LNDG WAS NORMAL EXCEPT I FELT A SLIGHT BUMPING ON THE L GEAR AS WE ROLLED OUT. WHEN MAINT INSPECTED THE GEAR THEY FOUND THE RETRACTION CYLINDER HAD SHEARED (PROBABLY JUST AS THE GEAR WAS FULLY RETRACTED ON TKOF, THEREFORE THE LOUD NOISE). WE BELIEVE THE VIOLENT SHUDDER WE FELT WAS WHEN THE GEAR, WHICH HAD APPARENTLY BEEN STUCK IN THE WELL, FELL OUT. THE OVERCTR HYD CYLINDERS WERE BENT, NOT ALLOWING THE GEAR PINS TO BE INSTALLED. MY CRM TRAINING WAS VERY USEFUL IN MANAGING THIS SIT, WHICH WAS NOT A 'TEXTBOOK' CASE. EVERYONE WE TALKED TO CONTRIBUTED SOME INFO WHICH I WAS ABLE TO USE TO MAKE APPROPRIATE DECISIONS. SUPPLEMENTAL INFO FROM ACN 457966: THIS WAS MY FIRST FLT IN THE B767, AND AN IOE FLT. A QUALIFIED FO TOOK THE R SEAT AND THE IOE CHK CAPT TOOK THE L SEAT. I ASSUMED THE JUMP SEAT. A DECISION WAS MADE TO LOWER THE GEAR. THE NOSE GEAR AND R MAIN GEAR INDICATED DOWN. THE L MAIN GEAR WAS NOT DOWN. DURING A TURN BACK TO SLC THE L MAIN GEAR DROPPED DOWN (STILL NO DOWN AND LOCKED INDICATION).
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.