A BEECHCRAFT BARON 55 ON LNDG EXPERIENCED AN UNCTLED SERIES OF BOUNCES RESULTING IN THE NOSE GEAR COLLAPSING DAMAGING THE ACFT.

Narrative

ON JAN/THU/02 AT ABOUT XA30Z WHILE LNDG AT THE ZZZ; US; ARPT; I EXPERIENCED AN UNCTLABLE BOUNCING EVENT COMMONLY REFERRED TO AS PORPOISING; WHICH RESULTED IN DAMAGE TO THE 1965 BEECHCRAFT BARON 55 THAT I WAS FLYING. AS I APCHED THE ARPT; THE WIND WAS BOUNCING THE PLANE A LITTLE AND I WAS EASILY ABLE TO MAINTAIN CTRLINE AND A CONSTANT APCH ANGLE TO THE APCH END OF RWY 28. AS I TOUCHED DOWN; THE PLANE BOUNCED INTO THE AIR AND BEGAN A VIOLENT AND UNCTLABLE SERIES OF BOUNCES RESULTING IN THE BREAKING OF THE NOSEWHEEL YOKE JUST BELOW THE STRUT ATTACH POINT CAUSING A NOSE LOW ATTITUDE IN EXCESS OF THE AIRPLANE'S DESIGN CAUSING THE PROP BLADES TO STRIKE THE GND. AS THE PLANE SKIDDED TO A STOP I TURNED OFF THE FUEL; MAGNETOS AND ELECTRICAL SYS. THE PLANE CAME TO A STOP AND I INSTRUCTED THE 2 PAX I HAD WITH ME TO GET OUT QUICKLY AND I FOLLOWED THEM OUT OF THE PLANE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ACFT WENT INTO A SERIES OF BOUNCES OR PORPOISING IMMEDIATELY AFTER TOUCHDOWN AND SUSPECTS SOFT MAIN GEAR STRUTS WITH DEFECTIVE INTERNAL O-RING SEALS. THE RPTR SAID BOTH PROPS WERE BENT AND ENGS NEED TEARDOWN FOR SUDDEN STOPPAGE BUT THE AIRPLANE STRUCTURE HAD ONLY NOSE GEAR DAMAGE.