Narrative:

On a VFR flight plan from guaymas, sonora, mexico, and on my initial contact with cxl unicom, the airport advisory runway 26, I moved the landing gear switch to the down position. The landing gear extended, however only the 2 main gear down lights were illuminated and the nose gear down light did not come on. I then looked at the exterior landing gear observation mirror mounted on the inboard side of the left engine, and the nose gear seem to have been fully extended. I extended my downwind leg of my approach and retracted the landing gear. Once again, I extended the landing gear and all 3 landing gear down lights were illuminated, and looking at the nose gear through the exterior mirror, the nose gear seem to be in a full down and locked position. At this time, I made a right turn and entered a right base leg for runway 25 and continued my approach to landing. I landed on the main gear first and then lowered the nose gear onto the runway and just before the aircraft came to a complete stop, the nose gear collapsed. At this time, all 3 landing gear lights were still illuminated and remained on until I turned off the master switch. It was brought to my attention prior to my flying this aircraft that the annual inspection and maintenance had just been completed on this aircraft. I suggest that in the future, and if there is an intense amount of main performed on an aircraft landing gear, the landing gear should be cycled at least 15 times while on jacks and 3 actual takeoff and lndgs of this aircraft before it is released from that maintenance facility. This suggestion is based on the fact that I made a total of 8 lndgs--3 prior to the trip and 5 prior to the collapsing of the nose gear. If the above suggestion was in effect prior to this incident, maybe the problem that caused the landing gear to collapse could have been detected and solve prior to flying this aircraft.

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Original NASA ASRS Text

Title: NOSE GEAR COLLAPSES AFTER LNDG ROLL.

Narrative: ON A VFR FLT PLAN FROM GUAYMAS, SONORA, MEXICO, AND ON MY INITIAL CONTACT WITH CXL UNICOM, THE ARPT ADVISORY RWY 26, I MOVED THE LNDG GEAR SWITCH TO THE DOWN POS. THE LNDG GEAR EXTENDED, HOWEVER ONLY THE 2 MAIN GEAR DOWN LIGHTS WERE ILLUMINATED AND THE NOSE GEAR DOWN LIGHT DID NOT COME ON. I THEN LOOKED AT THE EXTERIOR LNDG GEAR OBSERVATION MIRROR MOUNTED ON THE INBOARD SIDE OF THE LEFT ENG, AND THE NOSE GEAR SEEM TO HAVE BEEN FULLY EXTENDED. I EXTENDED MY DOWNWIND LEG OF MY APCH AND RETRACTED THE LNDG GEAR. ONCE AGAIN, I EXTENDED THE LNDG GEAR AND ALL 3 LNDG GEAR DOWN LIGHTS WERE ILLUMINATED, AND LOOKING AT THE NOSE GEAR THROUGH THE EXTERIOR MIRROR, THE NOSE GEAR SEEM TO BE IN A FULL DOWN AND LOCKED POS. AT THIS TIME, I MADE A RIGHT TURN AND ENTERED A RIGHT BASE LEG FOR RWY 25 AND CONTINUED MY APCH TO LNDG. I LANDED ON THE MAIN GEAR FIRST AND THEN LOWERED THE NOSE GEAR ONTO THE RWY AND JUST BEFORE THE ACFT CAME TO A COMPLETE STOP, THE NOSE GEAR COLLAPSED. AT THIS TIME, ALL 3 LNDG GEAR LIGHTS WERE STILL ILLUMINATED AND REMAINED ON UNTIL I TURNED OFF THE MASTER SWITCH. IT WAS BROUGHT TO MY ATTN PRIOR TO MY FLYING THIS ACFT THAT THE ANNUAL INSPECTION AND MAINT HAD JUST BEEN COMPLETED ON THIS ACFT. I SUGGEST THAT IN THE FUTURE, AND IF THERE IS AN INTENSE AMOUNT OF MAIN PERFORMED ON AN ACFT LNDG GEAR, THE LNDG GEAR SHOULD BE CYCLED AT LEAST 15 TIMES WHILE ON JACKS AND 3 ACTUAL TKOF AND LNDGS OF THIS ACFT BEFORE IT IS RELEASED FROM THAT MAINT FAC. THIS SUGGESTION IS BASED ON THE FACT THAT I MADE A TOTAL OF 8 LNDGS--3 PRIOR TO THE TRIP AND 5 PRIOR TO THE COLLAPSING OF THE NOSE GEAR. IF THE ABOVE SUGGESTION WAS IN EFFECT PRIOR TO THIS INCIDENT, MAYBE THE PROB THAT CAUSED THE LNDG GEAR TO COLLAPSE COULD HAVE BEEN DETECTED AND SOLVE PRIOR TO FLYING THIS ACFT.

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.