An S35 bonanza pilot reports a nose gear collapse on landing.

Attributes
ACN	737882
Time
Date	200705
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Operator	general aviation : personal
Make Model Name	Bonanza 35
Operating Under FAR Part	Part 91
Flight Phase	landing : roll
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 23 flight time total : 195 flight time type : 118
ASRS Report	737882
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Ambiguous

Narrative:

Normal landing at ZZZ. During rollout; nose gear collapsed. Landing confign 10 degrees flaps; gear showed down and locked; crossed threshold 100 KTS; smooth landing and rollout. Verified propeller pitch to execute a touch-and-go as front gear gave way and propeller struck runway. I toggled landing gear switch after propeller strike which partially retracted main gears. Plane slid to a stop on nose gear housing. I believe the cause to be 2 possibilities: 1) nose gear failure which inspection during repairs should reflect. 2) pilot error by raising landing gear instead of flaps during rollout; coupled with defective pressure switch on nose gear or sufficient lift still in effect to allow gear to raise.

Original NASA ASRS Text

Title: AN S35 BONANZA PILOT REPORTS A NOSE GEAR COLLAPSE ON LANDING.

Narrative: NORMAL LNDG AT ZZZ. DURING ROLLOUT; NOSE GEAR COLLAPSED. LNDG CONFIGN 10 DEGS FLAPS; GEAR SHOWED DOWN AND LOCKED; CROSSED THRESHOLD 100 KTS; SMOOTH LNDG AND ROLLOUT. VERIFIED PROP PITCH TO EXECUTE A TOUCH-AND-GO AS FRONT GEAR GAVE WAY AND PROP STRUCK RWY. I TOGGLED LNDG GEAR SWITCH AFTER PROP STRIKE WHICH PARTIALLY RETRACTED MAIN GEARS. PLANE SLID TO A STOP ON NOSE GEAR HOUSING. I BELIEVE THE CAUSE TO BE 2 POSSIBILITIES: 1) NOSE GEAR FAILURE WHICH INSPECTION DURING REPAIRS SHOULD REFLECT. 2) PLT ERROR BY RAISING LNDG GEAR INSTEAD OF FLAPS DURING ROLLOUT; COUPLED WITH DEFECTIVE PRESSURE SWITCH ON NOSE GEAR OR SUFFICIENT LIFT STILL IN EFFECT TO ALLOW GEAR TO RAISE.

Data retrieved from NASA's ASRS site as of January 2009 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.