Narrative:

I was taxiing my department's cessna 182P northbound on taxiway C, towards my initial assigned hold point, intersection K, just prior to runway 19L. As I was approaching the assigned intersection, sna tower advised me to cross runway 19L at taxiway K, and hold short of runway 19R at taxiway K. Also, the controller advised a B737 to cross runway 19L at left intersection onto runway 19R. As I began crossing runway 19L, I increased my taxi speed slightly. About 3/4 across runway 19L, my metal kneeboard, which was strapped across my right leg by an elastic belt and a 2-PIECE fastener, shifted and turned from facing-up (normal position) to sliding right and downward position. I then momentarily removed my r-hand off the engine throttle knob, raised my right leg slightly and gave the shifting kneeboard a quick shove to get it upright. It was also about this time, I observed myself approaching the holding area between runways 19L and 19R, and observing the B737 beginning its slow taxi onto runway 19R. The holding area between the runways, was slightly larger than the length of my aircraft. As I approached the holding area, when I raised my right leg slightly and shoved the kneeboard, it unexpectedly, flipped-up off my leg, and ended up on the floor area somewhere between my chair and the rudder pedals. As I then lowered my right foot back to the floor, I could feel beneath my right foot the kneeboard. I needed to get it out of the way, so that it would not restrict my access to the right pedal. I wanted to kick it sideways and aft. But, it eventually ended up lodged between the center pedestal and just forward, and against the face of the right pedal. My aircraft was now within the holding area, and still moving about the same speed as I had crossed runway 19L, and approaching the runway 19R hold short limit line. I immediately attempted to depress both pedals, with the kneeboard lying against the right pedal, to slow and stop the aircraft. All that action did was induce braking action on the left wheel, causing the aircraft to begin an immediate turn to the left, towards the taxiway perimeter lights and infield grass area. I released that braking attempt, and was able to force enough right pedal to get the aircraft somewhat straight ahead again, but it was still moving. With the aircraft quickly approaching the runway hold short line, I wanted to stop the aircraft without having to turn it into the grass infield, but I needed a few more seconds, and concrete ahead to effect a stop. I realized that this would mean having to cross over the hold short line. I grabbed the parking handle with my right hand, my right foot against the top of the right rudder pedal, and applied the left brake all in one instance. It brought the aircraft to an immediate halt past the hold short limit line, and several feet short of the runway. All about this time, the controller was demanding that I stop. I acknowledged his call, with a shaken voice. As I sat in the stopped aircraft, I noticed down the runway, that the B737 just completed his 90 degree turn onto the runway. I then heard the controller clear the B737 for takeoff. After a while, I was also cleared for takeoff. I didn't relay any details as to what just occurred. Upon landing at my base airfield, I was directed by the local controller to give the sna tower supervisor a call to review the runway incursion event.

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Original NASA ASRS Text

Title: CESSNA 182 PLT BECAME DISTRACTED BY AERO CHART CLIPBOARD FALLING OFF HIS LEG DOWN ON THE R RUDDER PEDAL CAUSING HIM TO OVERSHOOT RWY HOLD SHORT LINE AT SNA.

Narrative: I WAS TAXIING MY DEPT'S CESSNA 182P NBOUND ON TXWY C, TOWARDS MY INITIAL ASSIGNED HOLD POINT, INTXN K, JUST PRIOR TO RWY 19L. AS I WAS APCHING THE ASSIGNED INTXN, SNA TWR ADVISED ME TO CROSS RWY 19L AT TXWY K, AND HOLD SHORT OF RWY 19R AT TXWY K. ALSO, THE CTLR ADVISED A B737 TO CROSS RWY 19L AT L INTXN ONTO RWY 19R. AS I BEGAN XING RWY 19L, I INCREASED MY TAXI SPD SLIGHTLY. ABOUT 3/4 ACROSS RWY 19L, MY METAL KNEEBOARD, WHICH WAS STRAPPED ACROSS MY R LEG BY AN ELASTIC BELT AND A 2-PIECE FASTENER, SHIFTED AND TURNED FROM FACING-UP (NORMAL POS) TO SLIDING R AND DOWNWARD POS. I THEN MOMENTARILY REMOVED MY R-HAND OFF THE ENG THROTTLE KNOB, RAISED MY R LEG SLIGHTLY AND GAVE THE SHIFTING KNEEBOARD A QUICK SHOVE TO GET IT UPRIGHT. IT WAS ALSO ABOUT THIS TIME, I OBSERVED MYSELF APCHING THE HOLDING AREA BTWN RWYS 19L AND 19R, AND OBSERVING THE B737 BEGINNING ITS SLOW TAXI ONTO RWY 19R. THE HOLDING AREA BTWN THE RWYS, WAS SLIGHTLY LARGER THAN THE LENGTH OF MY ACFT. AS I APCHED THE HOLDING AREA, WHEN I RAISED MY R LEG SLIGHTLY AND SHOVED THE KNEEBOARD, IT UNEXPECTEDLY, FLIPPED-UP OFF MY LEG, AND ENDED UP ON THE FLOOR AREA SOMEWHERE BTWN MY CHAIR AND THE RUDDER PEDALS. AS I THEN LOWERED MY R FOOT BACK TO THE FLOOR, I COULD FEEL BENEATH MY R FOOT THE KNEEBOARD. I NEEDED TO GET IT OUT OF THE WAY, SO THAT IT WOULD NOT RESTRICT MY ACCESS TO THE R PEDAL. I WANTED TO KICK IT SIDEWAYS AND AFT. BUT, IT EVENTUALLY ENDED UP LODGED BTWN THE CTR PEDESTAL AND JUST FORWARD, AND AGAINST THE FACE OF THE R PEDAL. MY ACFT WAS NOW WITHIN THE HOLDING AREA, AND STILL MOVING ABOUT THE SAME SPD AS I HAD CROSSED RWY 19L, AND APCHING THE RWY 19R HOLD SHORT LIMIT LINE. I IMMEDIATELY ATTEMPTED TO DEPRESS BOTH PEDALS, WITH THE KNEEBOARD LYING AGAINST THE R PEDAL, TO SLOW AND STOP THE ACFT. ALL THAT ACTION DID WAS INDUCE BRAKING ACTION ON THE L WHEEL, CAUSING THE ACFT TO BEGIN AN IMMEDIATE TURN TO THE L, TOWARDS THE TXWY PERIMETER LIGHTS AND INFIELD GRASS AREA. I RELEASED THAT BRAKING ATTEMPT, AND WAS ABLE TO FORCE ENOUGH R PEDAL TO GET THE ACFT SOMEWHAT STRAIGHT AHEAD AGAIN, BUT IT WAS STILL MOVING. WITH THE ACFT QUICKLY APCHING THE RWY HOLD SHORT LINE, I WANTED TO STOP THE ACFT WITHOUT HAVING TO TURN IT INTO THE GRASS INFIELD, BUT I NEEDED A FEW MORE SECONDS, AND CONCRETE AHEAD TO EFFECT A STOP. I REALIZED THAT THIS WOULD MEAN HAVING TO CROSS OVER THE HOLD SHORT LINE. I GRABBED THE PARKING HANDLE WITH MY R HAND, MY R FOOT AGAINST THE TOP OF THE R RUDDER PEDAL, AND APPLIED THE L BRAKE ALL IN ONE INSTANCE. IT BROUGHT THE ACFT TO AN IMMEDIATE HALT PAST THE HOLD SHORT LIMIT LINE, AND SEVERAL FEET SHORT OF THE RWY. ALL ABOUT THIS TIME, THE CTLR WAS DEMANDING THAT I STOP. I ACKNOWLEDGED HIS CALL, WITH A SHAKEN VOICE. AS I SAT IN THE STOPPED ACFT, I NOTICED DOWN THE RWY, THAT THE B737 JUST COMPLETED HIS 90 DEG TURN ONTO THE RWY. I THEN HEARD THE CTLR CLR THE B737 FOR TKOF. AFTER A WHILE, I WAS ALSO CLRED FOR TKOF. I DIDN'T RELAY ANY DETAILS AS TO WHAT JUST OCCURRED. UPON LNDG AT MY BASE AIRFIELD, I WAS DIRECTED BY THE LCL CTLR TO GIVE THE SNA TWR SUPVR A CALL TO REVIEW THE RWY INCURSION EVENT.

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.