GA small aircraft nose gear collapsed on landing.

Attributes
ACN	157986
Time
Date	199009
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : myf
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Small Aircraft, High Wing, 1 Eng, Retractable Gear
Flight Phase	landing other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 30 flight time total : 285
ASRS Report	157986
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	faa : investigated other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

After practicing some maneuvers in the local area, I returned in the small aircraft to perform several touch and goes. The first approach I made a go around (practice) and joined downwind to make a normal traffic pattern. A final landing checklist was performed and the gear extended. A green light indicated. Everything appeared normal and the tower cleared me to land. On base leg I performed a gumps check and the green light was confirmed. On final (short) the propeller was advanced, power reduced carburetor heat applied and gear down light checked on. A normal landing followed until the nose proceeded to pitch down and the propeller contacted the runway. We skidded to a stop as the nose gear collapsed. An FAA inspector photographed the airplane and inspected the runway and cabin. The aircraft was then towed from the scene with the main gear still extended. Mechanical downlock, for the nose gear I think may have failed. No determination has been made at this point. A suggestion of 3 green lights instead of one.

Original NASA ASRS Text

Title: GA SMA NOSE GEAR COLLAPSED ON LNDG.

Narrative: AFTER PRACTICING SOME MANEUVERS IN THE LCL AREA, I RETURNED IN THE SMA TO PERFORM SEVERAL TOUCH AND GOES. THE FIRST APCH I MADE A GO AROUND (PRACTICE) AND JOINED DOWNWIND TO MAKE A NORMAL TFC PATTERN. A FINAL LNDG CHKLIST WAS PERFORMED AND THE GEAR EXTENDED. A GREEN LIGHT INDICATED. EVERYTHING APPEARED NORMAL AND THE TWR CLRED ME TO LAND. ON BASE LEG I PERFORMED A GUMPS CHK AND THE GREEN LIGHT WAS CONFIRMED. ON FINAL (SHORT) THE PROP WAS ADVANCED, PWR REDUCED CARB HEAT APPLIED AND GEAR DOWN LIGHT CHKED ON. A NORMAL LNDG FOLLOWED UNTIL THE NOSE PROCEEDED TO PITCH DOWN AND THE PROP CONTACTED THE RWY. WE SKIDDED TO A STOP AS THE NOSE GEAR COLLAPSED. AN FAA INSPECTOR PHOTOGRAPHED THE AIRPLANE AND INSPECTED THE RWY AND CABIN. THE ACFT WAS THEN TOWED FROM THE SCENE WITH THE MAIN GEAR STILL EXTENDED. MECHANICAL DOWNLOCK, FOR THE NOSE GEAR I THINK MAY HAVE FAILED. NO DETERMINATION HAS BEEN MADE AT THIS POINT. A SUGGESTION OF 3 GREEN LIGHTS INSTEAD OF ONE.

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.