<< >> NASA ASRS Report 343446, July 1996

Corporate twin has right main gear partially collapse on landing after scheduled aircraft maintenance.

Attributes
ACN	343446
Time
Date	199607
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mlu
State Reference	LA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	landing other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : cfi pilot : instrument
Experience	flight time last 90 days : 30 flight time total : 1300 flight time type : 250
ASRS Report	343446
Person 2
Affiliation	Other
Function	observation : passenger
Qualification	other other : other
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : insufficient time
Consequence	other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

I was test flying the aircraft after a hydraulic line was replaced. While flying, all indications dealing with the landing gear and hydraulic system were normal. I determined the test flight was a success and was coming back to the airport to land. I verified the gear down with a visual check of the main gear, and verified that the gear down indictors were on. The touchdown was uneventful, but on rollout the right main landing gear collapsed. I immediately shut down both engines and the master electrical switch. After the aircraft came to a complete stop, my passenger and I evacuate/evacuationed the aircraft immediately. Once outside of the aircraft, I realized the propellers had not struck the ground, and neither had the wing. The only damage on the aircraft was skin on the bottom, right side of the fuselage. No structural damage occurred. No injuries occurred.

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Original NASA ASRS Text

Title: CORPORATE TWIN HAS R MAIN GEAR PARTIALLY COLLAPSE ON LNDG AFTER SCHEDULED ACFT MAINT.

Narrative: I WAS TEST FLYING THE ACFT AFTER A HYD LINE WAS REPLACED. WHILE FLYING, ALL INDICATIONS DEALING WITH THE LNDG GEAR AND HYD SYS WERE NORMAL. I DETERMINED THE TEST FLT WAS A SUCCESS AND WAS COMING BACK TO THE ARPT TO LAND. I VERIFIED THE GEAR DOWN WITH A VISUAL CHK OF THE MAIN GEAR, AND VERIFIED THAT THE GEAR DOWN INDICTORS WERE ON. THE TOUCHDOWN WAS UNEVENTFUL, BUT ON ROLLOUT THE R MAIN LNDG GEAR COLLAPSED. I IMMEDIATELY SHUT DOWN BOTH ENGS AND THE MASTER ELECTRICAL SWITCH. AFTER THE ACFT CAME TO A COMPLETE STOP, MY PAX AND I EVACED THE ACFT IMMEDIATELY. ONCE OUTSIDE OF THE ACFT, I REALIZED THE PROPS HAD NOT STRUCK THE GND, AND NEITHER HAD THE WING. THE ONLY DAMAGE ON THE ACFT WAS SKIN ON THE BOTTOM, R SIDE OF THE FUSELAGE. NO STRUCTURAL DAMAGE OCCURRED. NO INJURIES OCCURRED.

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.