<< >> NASA ASRS Report 582459, May 2003

A PA18-150 landing at an off airport site ends up upside down with minor damage after hitting a soft spot at slow speed during landing roll.

Attributes
ACN	582459
Time
Date	200305
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 100
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zsha.artcc
Operator	general aviation : personal
Make Model Name	PA-18/19 Super Cub
Operating Under FAR Part	Part 91
Flight Phase	landing : roll
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot oversight : pic
Qualification	pilot : multi engine pilot : instrument pilot : flight engineer pilot : atp pilot : cfi pilot : commercial
Experience	flight time last 90 days : 100 flight time total : 7700 flight time type : 1000
ASRS Report	582459
Events
Anomaly	other anomaly other anomaly other
Independent Detector	other flight crewb
Resolutory Action	none taken : unable
Consequence	faa : investigated other other
Supplementary
Problem Areas	Flight Crew Human Performance Airport
Primary Problem	Airport

Narrative:

While landing at an off airport site, I drug the surface with the main tires twice, surface felt consistent and similar to previous times landing at this site. While coming in to land, I touched down in 3 point attitude rollout seemed normal. At approximately 10 mph during the deceleration the aircraft hit a 'soft spot' and nosed over and ended up inverted. I made a report to FAA and NTSB. Subsequently I had a mechanic obtain and authority/authorized a ferry flight utilizing an FAA ferry permit. The NTSB ruled this as no accident because of lack of substantial damage to aircraft. No damage to wings, no major damage to empennage. Aircraft nosed up partly due to lack of weight in tail. Aircraft was within weight and balance limits. This was the first landing at this site since last fall.

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Original NASA ASRS Text

Title: A PA18-150 LNDG AT AN OFF ARPT SITE ENDS UP UPSIDE DOWN WITH MINOR DAMAGE AFTER HITTING A SOFT SPOT AT SLOW SPD DURING LNDG ROLL.

Narrative: WHILE LNDG AT AN OFF ARPT SITE, I DRUG THE SURFACE WITH THE MAIN TIRES TWICE, SURFACE FELT CONSISTENT AND SIMILAR TO PREVIOUS TIMES LNDG AT THIS SITE. WHILE COMING IN TO LAND, I TOUCHED DOWN IN 3 POINT ATTITUDE ROLLOUT SEEMED NORMAL. AT APPROX 10 MPH DURING THE DECELERATION THE ACFT HIT A 'SOFT SPOT' AND NOSED OVER AND ENDED UP INVERTED. I MADE A RPT TO FAA AND NTSB. SUBSEQUENTLY I HAD A MECH OBTAIN AND AUTH A FERRY FLT UTILIZING AN FAA FERRY PERMIT. THE NTSB RULED THIS AS NO ACCIDENT BECAUSE OF LACK OF SUBSTANTIAL DAMAGE TO ACFT. NO DAMAGE TO WINGS, NO MAJOR DAMAGE TO EMPENNAGE. ACFT NOSED UP PARTLY DUE TO LACK OF WT IN TAIL. ACFT WAS WITHIN WT AND BAL LIMITS. THIS WAS THE FIRST LNDG AT THIS SITE SINCE LAST FALL.

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.