|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||airport : dal|
|Altitude||agl bound lower : 0|
agl bound upper : 0
|Operator||common carrier : air taxi|
|Make Model Name||Small Transport, Low Wing, 2 Recip Eng|
|Flight Phase||landing other|
|Affiliation||company : air taxi|
|Function||flight crew : single pilot|
|Qualification||pilot : atp|
|Experience||flight time last 90 days : 150|
flight time total : 3600
flight time type : 400
|Anomaly||aircraft equipment problem : critical|
|Independent Detector||other flight crewa|
|Resolutory Action||flight crew : declared emergency|
none taken : unable
|Primary Problem||Flight Crew Human Performance|
After executing a normal landing on rny 13L at kdal in to a crosswind reported as 180 degree 18 knots gusting 25, I was unable to maintain directional control, due to weather cocking into the wind with full control deflection. As side loading increased the left main gear collapsed. Full down and locked gear indicators were observed prior to landing. Touchdown was nominal using the upwind wing low or sideslip technique. Severe gusting was observed during touchdown and rollout necessitating minimum crosswind technique. At one point during the weathercocking event I debated making a go around and elected to remain on the ground rather than risk more severe damage due to failure of a balked landing attempt. In retrospect I realized several decisions that might possibly have prevented the incident. By requesting landing on runway 18. As well, utilizing differential power(i.e. Increased power on the upwind engine) during rollout may have mitigated the weather cocking, reducing gear sideload. At the time of this report it is unknown whether mechanical failure was a factor in the gear collapse.
Original NASA ASRS Text
Title: ATX SMT GEAR COLLAPSED DURING CROSSWIND LNDG.
Narrative: AFTER EXECUTING A NORMAL LNDG ON RNY 13L AT KDAL IN TO A XWIND REPORTED AS 180 DEG 18 KNOTS GUSTING 25, I WAS UNABLE TO MAINTAIN DIRECTIONAL CTL, DUE TO WEATHER COCKING INTO THE WIND WITH FULL CTL DEFLECTION. AS SIDE LOADING INCREASED THE L MAIN GEAR COLLAPSED. FULL DOWN AND LOCKED GEAR INDICATORS WERE OBSERVED PRIOR TO LNDG. TOUCHDOWN WAS NOMINAL USING THE UPWIND WING LOW OR SIDESLIP TECHNIQUE. SEVERE GUSTING WAS OBSERVED DURING TOUCHDOWN AND ROLLOUT NECESSITATING MINIMUM XWIND TECHNIQUE. AT ONE POINT DURING THE WEATHERCOCKING EVENT I DEBATED MAKING A GO AROUND AND ELECTED TO REMAIN ON THE GND RATHER THAN RISK MORE SEVERE DAMAGE DUE TO FAILURE OF A BALKED LNDG ATTEMPT. IN RETROSPECT I REALIZED SEVERAL DECISIONS THAT MIGHT POSSIBLY HAVE PREVENTED THE INCIDENT. BY REQUESTING LANDING ON RWY 18. AS WELL, UTILIZING DIFFERENTIAL POWER(I.E. INCREASED POWER ON THE UPWIND ENGINE) DURING ROLLOUT MAY HAVE MITIGATED THE WEATHER COCKING, REDUCING GEAR SIDELOAD. AT THE TIME OF THIS REPORT IT IS UNKNOWN WHETHER MECHANICAL FAILURE WAS A FACTOR IN THE GEAR COLLAPSE.
Data retrieved from NASA's ASRS site as of August 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.