Narrative:

After supervising the loading of the plane (an small transport) at beech west, ont, I got in to start the engines and got a door warning light. I had about 12-13 mins until my release time for flow control to lax. I got out and checked that the cargo door was shut properly. Also checking again the pad and cabin doors. The warning light was still on, so I got out again. I rechked the door including the action of the locking pins and their respective holes. They all seemed fine. With everything securely checked and bottomed up I got in and still had the warning light. My past experience with the company aircraft (mostly small transport) was such that I figured the warning circuit had failed and I would have it checked after arrival and unloading at lax. When I got to the runway of 26R and taxiway 100 I was delayed past my release time for wake avoidance then 'cleared for immediate takeoff.' I made a higher than normal speed sweep on the runway and a box came out of the right passenger door (?). I had not checked the passenger door as the company policy is to not use it and have it locked. (The pilots don't even have a key to it.) when locked it can't be opened from inside or out. To me it had become a part of the aircraft structure. I was notified at lax that I had dropped something on the runway at ont. It was only when walking around the plane that I found the offending door. Somehow it had been unlocked. Also, the bottom detention device (a ball and spring) was missing letting the handle slip out of the safety position. Suggestion: give pilots keys to the door and control of the systems and maybe a warning light designating which door is open.

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Original NASA ASRS Text

Title: TKOF WITH DOOR WARNING LIGHT INDICATION.

Narrative: AFTER SUPERVISING THE LOADING OF THE PLANE (AN SMT) AT BEECH W, ONT, I GOT IN TO START THE ENGS AND GOT A DOOR WARNING LIGHT. I HAD ABOUT 12-13 MINS UNTIL MY RELEASE TIME FOR FLOW CTL TO LAX. I GOT OUT AND CHKED THAT THE CARGO DOOR WAS SHUT PROPERLY. ALSO CHKING AGAIN THE PAD AND CABIN DOORS. THE WARNING LIGHT WAS STILL ON, SO I GOT OUT AGAIN. I RECHKED THE DOOR INCLUDING THE ACTION OF THE LOCKING PINS AND THEIR RESPECTIVE HOLES. THEY ALL SEEMED FINE. WITH EVERYTHING SECURELY CHKED AND BOTTOMED UP I GOT IN AND STILL HAD THE WARNING LIGHT. MY PAST EXPERIENCE WITH THE COMPANY ACFT (MOSTLY SMT) WAS SUCH THAT I FIGURED THE WARNING CIRCUIT HAD FAILED AND I WOULD HAVE IT CHKED AFTER ARR AND UNLOADING AT LAX. WHEN I GOT TO THE RWY OF 26R AND TXWY 100 I WAS DELAYED PAST MY RELEASE TIME FOR WAKE AVOIDANCE THEN 'CLRED FOR IMMEDIATE TKOF.' I MADE A HIGHER THAN NORMAL SPD SWEEP ON THE RWY AND A BOX CAME OUT OF THE RIGHT PAX DOOR (?). I HAD NOT CHKED THE PAX DOOR AS THE COMPANY POLICY IS TO NOT USE IT AND HAVE IT LOCKED. (THE PLTS DON'T EVEN HAVE A KEY TO IT.) WHEN LOCKED IT CAN'T BE OPENED FROM INSIDE OR OUT. TO ME IT HAD BECOME A PART OF THE ACFT STRUCTURE. I WAS NOTIFIED AT LAX THAT I HAD DROPPED SOMETHING ON THE RWY AT ONT. IT WAS ONLY WHEN WALKING AROUND THE PLANE THAT I FOUND THE OFFENDING DOOR. SOMEHOW IT HAD BEEN UNLOCKED. ALSO, THE BOTTOM DETENTION DEVICE (A BALL AND SPRING) WAS MISSING LETTING THE HANDLE SLIP OUT OF THE SAFETY POS. SUGGESTION: GIVE PLTS KEYS TO THE DOOR AND CONTROL OF THE SYSTEMS AND MAYBE A WARNING LIGHT DESIGNATING WHICH DOOR IS OPEN.

Data retrieved from NASA's ASRS site as of August 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.