Narrative:

On a VFR flight by myself from my home airstrip to port townsend my aircraft began to develop carburetor ice -- full carburetor heat did not correct the problem so I landed at the vashon island airstrip. Power available now was about 1300 RPM. Landing no problem, engine shutdown. Where I opened cowl and inspected the engine -- no visual sign of problems, I was sure it was carburetor ice. Having no electrical/starter system I have to hand propeller aircraft. I have been proping this type of aircraft for many yrs -- all with no problem until today. I checked cockpit controls as always, turned on the magnetic switch and went to the front to try to restart the engine. I did not fire on the first 2 pulls on the propeller. On the third start attempt the engine sputtered twice then ran up to around some unknown RPM but enough for it to jump the chocks and then turn to run into a hangar 50 ft away. The engine returned to idle until I turned off the magnetos. Having started aircraft this way 3000 plus times, this was a shock to me for sure. Damage to the hangar was 4 fiberglass panels and supports broken. Repair costs were $55. Damage to the aircraft was the right wing tip bow broken, fabric damage, propeller had several nicks. Aircraft could have been flown home but was disassembled and taken home. My thoughts about the sudden runup in rmp then return to sole was that the carburetor ice when cleared must have caused this or excess gas was somehow trapped and once used, aircraft engine returned to normal RPM. Having no one to propeller me or no easy place to tie the tail to something, I'm sure complacency on my part allowed this to happen.

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Original NASA ASRS Text

Title: DURING HAND PROP ENG START WITHOUT ASSISTANCE AVAILABLE THE AIRPLANE STARTED AND JUMPED THE CHOCKS AND RAN INTO A WALL.

Narrative: ON A VFR FLT BY MYSELF FROM MY HOME AIRSTRIP TO PORT TOWNSEND MY ACFT BEGAN TO DEVELOP CARB ICE -- FULL CARB HEAT DID NOT CORRECT THE PROB SO I LANDED AT THE VASHON ISLAND AIRSTRIP. PWR AVAILABLE NOW WAS ABOUT 1300 RPM. LNDG NO PROB, ENG SHUTDOWN. WHERE I OPENED COWL AND INSPECTED THE ENG -- NO VISUAL SIGN OF PROBS, I WAS SURE IT WAS CARB ICE. HAVING NO ELECTRICAL/STARTER SYS I HAVE TO HAND PROP ACFT. I HAVE BEEN PROPING THIS TYPE OF ACFT FOR MANY YRS -- ALL WITH NO PROB UNTIL TODAY. I CHKED COCKPIT CTLS AS ALWAYS, TURNED ON THE MAGNETIC SWITCH AND WENT TO THE FRONT TO TRY TO RESTART THE ENG. I DID NOT FIRE ON THE FIRST 2 PULLS ON THE PROP. ON THE THIRD START ATTEMPT THE ENG SPUTTERED TWICE THEN RAN UP TO AROUND SOME UNKNOWN RPM BUT ENOUGH FOR IT TO JUMP THE CHOCKS AND THEN TURN TO RUN INTO A HANGAR 50 FT AWAY. THE ENG RETURNED TO IDLE UNTIL I TURNED OFF THE MAGNETOS. HAVING STARTED ACFT THIS WAY 3000 PLUS TIMES, THIS WAS A SHOCK TO ME FOR SURE. DAMAGE TO THE HANGAR WAS 4 FIBERGLASS PANELS AND SUPPORTS BROKEN. REPAIR COSTS WERE $55. DAMAGE TO THE ACFT WAS THE R WING TIP BOW BROKEN, FABRIC DAMAGE, PROP HAD SEVERAL NICKS. ACFT COULD HAVE BEEN FLOWN HOME BUT WAS DISASSEMBLED AND TAKEN HOME. MY THOUGHTS ABOUT THE SUDDEN RUNUP IN RMP THEN RETURN TO SOLE WAS THAT THE CARB ICE WHEN CLRED MUST HAVE CAUSED THIS OR EXCESS GAS WAS SOMEHOW TRAPPED AND ONCE USED, ACFT ENG RETURNED TO NORMAL RPM. HAVING NO ONE TO PROP ME OR NO EASY PLACE TO TIE THE TAIL TO SOMETHING, I'M SURE COMPLACENCY ON MY PART ALLOWED THIS TO HAPPEN.

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.