Light twin crosses runway hold short line when the pilot's seat moves aft while attempting to apply ...

Attributes
ACN	780004
Time
Date	200803
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air taxi
Make Model Name	Small Aircraft Low Wing 2 Eng Retractable Gear
Operating Under FAR Part	Part 135
Flight Phase	ground : taxi ground : holding
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : atp pilot : commercial pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 180 flight time total : 11000 flight time type : 400
ASRS Report	780004
Events
Anomaly	aircraft equipment problem : critical incursion : runway other anomaly
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time none taken : unable
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

I had picked up my IFR clearance; then contacted ground control; 'taxi to runway 12R via taxiway G; monitor tower.' I was taxiing on taxiway G; coming up to hold short line. When I went to brake; my seat slid back and the airplane continued rolling. As I hurriedly adjusted myself to brake; the aircraft had completely crossed hold short line before I could stop. I contacted tower and they (without saying anything about me crossing hold short line) cleared me for takeoff runway 12R with right turn to heading 230 degrees. (I wonder if they were aware of my infraction.) needless to say; I didn't say any more. And from now on; I am going to double-; triple-check that my seat is latched; locked; not going to move before I taxi.

Original NASA ASRS Text

Title: LIGHT TWIN CROSSES RWY HOLD SHORT LINE WHEN THE PLT'S SEAT MOVES AFT WHILE ATTEMPTING TO APPLY BRAKES.

Narrative: I HAD PICKED UP MY IFR CLRNC; THEN CONTACTED GND CTL; 'TAXI TO RWY 12R VIA TXWY G; MONITOR TWR.' I WAS TAXIING ON TXWY G; COMING UP TO HOLD SHORT LINE. WHEN I WENT TO BRAKE; MY SEAT SLID BACK AND THE AIRPLANE CONTINUED ROLLING. AS I HURRIEDLY ADJUSTED MYSELF TO BRAKE; THE ACFT HAD COMPLETELY CROSSED HOLD SHORT LINE BEFORE I COULD STOP. I CONTACTED TWR AND THEY (WITHOUT SAYING ANYTHING ABOUT ME XING HOLD SHORT LINE) CLRED ME FOR TKOF RWY 12R WITH R TURN TO HDG 230 DEGS. (I WONDER IF THEY WERE AWARE OF MY INFRACTION.) NEEDLESS TO SAY; I DIDN'T SAY ANY MORE. AND FROM NOW ON; I AM GOING TO DOUBLE-; TRIPLE-CHK THAT MY SEAT IS LATCHED; LOCKED; NOT GOING TO MOVE BEFORE I TAXI.

Data retrieved from NASA's ASRS site as of May 2009 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.

Light twin crosses runway hold short line when the pilot's seat moves aft while attempting to apply brakes.