Aircraft porpoised on landing causing the nose wheel to collapse.

Attributes
ACN	143170
Time
Date	199004
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : olm
State Reference	WA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : ground
Qualification	controller : radar
Experience	controller military : 3 controller non radar : 2 controller radar : 5 controller supervisory : 5
ASRS Report	143170
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	other anomaly
Independent Detector	other controllera
Resolutory Action	none taken : unable
Consequence	other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

The small transport porpoised on his landing (up and down motion from nose to tail) a few time, whereupon the nose gear appeared to collapse. The aircraft came to stop about 200' after the nose gear met the runway. Crash crew was notified immediately. No injuries except to the aircraft (propellers, nose gear, right main).

Original NASA ASRS Text

Title: ACFT PORPOISED ON LNDG CAUSING THE NOSE WHEEL TO COLLAPSE.

Narrative: THE SMT PORPOISED ON HIS LNDG (UP AND DOWN MOTION FROM NOSE TO TAIL) A FEW TIME, WHEREUPON THE NOSE GEAR APPEARED TO COLLAPSE. THE ACFT CAME TO STOP ABOUT 200' AFTER THE NOSE GEAR MET THE RWY. CRASH CREW WAS NOTIFIED IMMEDIATELY. NO INJURIES EXCEPT TO THE ACFT (PROPS, NOSE GEAR, RIGHT MAIN).

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.