A JETSTREAM 3201 ON TKOF ROLL HAD TRAILING EDGE FLAPS MOVE FROM 10 DEGS TKOF POS TO 35 DEGS DUE TO A FAILED FLAP HANDLE SWITCH.

Narrative

DUE TO A FLAP SELECTION HANDLE MALFUNCTION; MY FLAPS TRAVELED FROM 10 DEGS (TKOF) TO 35 DEGS (LNDG) SOMETIME DURING THE TKOF ROLL. THERE IS NO ANNUNCIATOR FOR THIS OCCURRENCE. DUE TO SITUATIONAL CONSIDERATIONS; I CONTINUED THE FLT TO STL (NO PAX; DAY; VFR). THE SWITCH WAS REPLACED AND THE PROB CORRECTED. 2 DAYS PRIOR TO THIS; THE ACFT SUSTAINED SIGNIFICANT DAMAGE DUE TO A LIGHTNING STRIKE UNDER ANOTHER CAPT'S COMMAND. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE FLAP INDICATOR WAS CHKED AT START OF TKOF ROLL AND WAS AT 10 DEGS AND THE FLAPS WERE VISUALLY CHKED AT 10 DEGS. THE RPTR SAID THAT DURING THE TKOF ROLL AND AT OR NEAR ROTATION; THE TRAILING EDGE FLAPS EXTENDED TO THE 35 DEG POS UNCOMMANDED. THE RPTR SAID ON CLBING OUT; IT APPEARED A STRONG HEADWIND WAS ENCOUNTERED AND THE ACFT PERFORMANCE WAS POOR. THE RPTR STATED THE FLAP HANDLE WAS MOVED TO THE FULL RETRACT POS FROM THE INDICATED 10 DEGS AND IT WAS DISCOVERED THE FLAPS NOW AT 35 DEGS WOULD NOT RETRACT. THE RPTR SAID THERE IS NO CHKLIST FOR THIS MALFUNCTION. THE RPTR SAID THE FLAP HANDLE WAS MOVED TO FULL RETRACT SEVERAL TIMES WITH NO FLAP MOVEMENT AND CIRCUIT BREAKER RESET TO HELP. THE RPTR SAID THE ALTERNATE FLAP OP IS A HAND PUMP BUT USED ONLY TO EXTEND THE FLAPS. THE RPTR STATED THIS ACFT DOES NOT HAVE A TKOF CONFIGN WARNING SYS. THE RPTR SAID IT WAS HIS DECISION TO CONTINUE TO STL AT FLAPS 35 DEG SPD. THE RPTR STATED MAINT FOUND THE FLAP SELECTOR HANDLE SWITCH FAILED CLOSED.