|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||airport : gif|
|Altitude||agl bound lower : 0|
agl bound upper : 0
|Operator||general aviation : instructional|
|Make Model Name||Small Aircraft, Low Wing, 2 Eng, Retractable Gear|
|Flight Phase||landing other|
|Function||instruction : instructor|
oversight : pic
|Qualification||pilot : cfi|
pilot : instrument
|Experience||flight time last 90 days : 240|
flight time total : 1350
flight time type : 105
|Function||flight crew : single pilot|
instruction : trainee
|Qualification||pilot : private|
|Anomaly||aircraft equipment problem : critical|
other anomaly other
|Independent Detector||other flight crewa|
|Resolutory Action||none taken : unable|
|Air Traffic Incident||other|
During a normal rolling after a landing with an small aircraft twin, I noticed the wing gradually lowering on ground rolling only after 300 to 400 ft beyond the touchdown point. I suddenly tried to feather both propellers and shut the engine down securing the aircraft, but the right propeller spinning only by inertia, touched the ground just before stopping. Meanwhile, the aircraft was sliding to the right side of the runway. At the time the aircraft stopped and I got out of the cabin, I saw the right gear below the trailing edge underneath the right flap. At that point I understood that the final cause was the collapsed structure of the gear joint with the wing. Pointing out that we had all 3 green lights on and the landing wasn't that hard, with only 5 to 8 KTS of headwind (no crosswind component) for runway 22, the factor that could have caused the incident is the stress due to the yrs of operation of the aircraft. Damage reported on the aircraft is only on right main gear, right flap, right aileron, right propeller.
Original NASA ASRS Text
Title: R GEAR COLLAPSES ON SMA TWIN DURING TRAINING IN PROGRESS, LNDG.
Narrative: DURING A NORMAL ROLLING AFTER A LNDG WITH AN SMA TWIN, I NOTICED THE WING GRADUALLY LOWERING ON GND ROLLING ONLY AFTER 300 TO 400 FT BEYOND THE TOUCHDOWN POINT. I SUDDENLY TRIED TO FEATHER BOTH PROPS AND SHUT THE ENG DOWN SECURING THE ACFT, BUT THE R PROP SPINNING ONLY BY INERTIA, TOUCHED THE GND JUST BEFORE STOPPING. MEANWHILE, THE ACFT WAS SLIDING TO THE R SIDE OF THE RWY. AT THE TIME THE ACFT STOPPED AND I GOT OUT OF THE CABIN, I SAW THE R GEAR BELOW THE TRAILING EDGE UNDERNEATH THE R FLAP. AT THAT POINT I UNDERSTOOD THAT THE FINAL CAUSE WAS THE COLLAPSED STRUCTURE OF THE GEAR JOINT WITH THE WING. POINTING OUT THAT WE HAD ALL 3 GREEN LIGHTS ON AND THE LNDG WASN'T THAT HARD, WITH ONLY 5 TO 8 KTS OF HEADWIND (NO XWIND COMPONENT) FOR RWY 22, THE FACTOR THAT COULD HAVE CAUSED THE INCIDENT IS THE STRESS DUE TO THE YRS OF OP OF THE ACFT. DAMAGE RPTED ON THE ACFT IS ONLY ON R MAIN GEAR, R FLAP, R AILERON, R PROP.
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.