A porpoising tricycle GA aircraft collapses its nose gear during a stall after a series of high boun...

Attributes
ACN	591380
Time
Date	200308
Day	Thu
Place
Locale Reference	airport : 6s5.airport
State Reference	MT
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Aircraft 1
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : approach landing : roll other
Route In Use	approach : traffic pattern
Person 1
Affiliation	other
Function	flight crew : single pilot
ASRS Report	591380
Events
Anomaly	other anomaly other anomaly other anomaly other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	other other other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

I was practicing short-field takeoff and lndgs at hamilton field, where I've trained for the last several weeks on a calm, clear day. I approached runway 16 with 30 degree flaps and touched down at about 65 KTS, faster than the 55 KTS I was hoping to touch down at. My 2 rear wheels touched down (fairly hard, but not extremely hard), and because of my airspeed and full flaps, the aircraft rose a few ft above the runway. With hindsight, I realize that I should have added power. At this point, I did not add power. The aircraft settled, again on the 2 rear wheels (as I applied moderate back-pressure to the yoke), and this time, it bounced high -- I'd guess 10 ft, it settled again on its rear wheels and stalled. It then bounced very high -- perhaps 15 ft -- I can't be sure. This (last) time, it came down either on all 3 wheels simultaneously, or nose gear first. The front gear folded under. The airplane nosed over, striking the propeller and left wingtip. I skidded to a stop, with tail held high at about 45 degree attitude. I removed the key, turned off the master, and departed the airplane quickly. I was unhurt. I lifted the nose and righted the airplane, and walked toward the office.

Original NASA ASRS Text

Title: A PORPOISING TRICYCLE GA ACFT COLLAPSES ITS NOSE GEAR DURING A STALL AFTER A SERIES OF HIGH BOUNCES ON THE RWY AT 6S5, MT.

Narrative: I WAS PRACTICING SHORT-FIELD TKOF AND LNDGS AT HAMILTON FIELD, WHERE I'VE TRAINED FOR THE LAST SEVERAL WKS ON A CALM, CLR DAY. I APCHED RWY 16 WITH 30 DEG FLAPS AND TOUCHED DOWN AT ABOUT 65 KTS, FASTER THAN THE 55 KTS I WAS HOPING TO TOUCH DOWN AT. MY 2 REAR WHEELS TOUCHED DOWN (FAIRLY HARD, BUT NOT EXTREMELY HARD), AND BECAUSE OF MY AIRSPD AND FULL FLAPS, THE ACFT ROSE A FEW FT ABOVE THE RWY. WITH HINDSIGHT, I REALIZE THAT I SHOULD HAVE ADDED PWR. AT THIS POINT, I DID NOT ADD PWR. THE ACFT SETTLED, AGAIN ON THE 2 REAR WHEELS (AS I APPLIED MODERATE BACK-PRESSURE TO THE YOKE), AND THIS TIME, IT BOUNCED HIGH -- I'D GUESS 10 FT, IT SETTLED AGAIN ON ITS REAR WHEELS AND STALLED. IT THEN BOUNCED VERY HIGH -- PERHAPS 15 FT -- I CAN'T BE SURE. THIS (LAST) TIME, IT CAME DOWN EITHER ON ALL 3 WHEELS SIMULTANEOUSLY, OR NOSE GEAR FIRST. THE FRONT GEAR FOLDED UNDER. THE AIRPLANE NOSED OVER, STRIKING THE PROP AND L WINGTIP. I SKIDDED TO A STOP, WITH TAIL HELD HIGH AT ABOUT 45 DEG ATTITUDE. I REMOVED THE KEY, TURNED OFF THE MASTER, AND DEPARTED THE AIRPLANE QUICKLY. I WAS UNHURT. I LIFTED THE NOSE AND RIGHTED THE AIRPLANE, AND WALKED TOWARD THE OFFICE.

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.

A porpoising tricycle GA aircraft collapses its nose gear during a stall after a series of high bounces on the runway at 6s5, mt.