Narrative:

Aircraft was in our hangar for sheet metal repairs in the east and east compartment. When I received the job card, the repair was done and bought by inspection. The only thing remaining was the installation of an avionics rack containing the WX radar, and 2 air data computers. I knew I was working with avionics, something I'm not very familiar with, so, I was being extra careful to make all of the connections on the rear of the rack. On mon I was informed that the aircraft aborted takeoff during the wkend due to no airspeed indication. It was found that I failed to connect the pitot lines, and airspeed lines on the front of the air data computer boxes. I'm sorry to say that I never knew that air lines were supposed to be connected to the front of these boxes. When I slid them into the racks all I remember seeing were smooth black surfaces. The airlines themselves were not dangling in sight. They had to have been stuffed into the upper structure out of sight, and they did not carry orange streamers to make them visible. I'm at a loss to explain why I didn't see the connections on the front of the boxes. I know that I made a serious mistake and regret that it ever happened.

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Original NASA ASRS Text

Title: SHEET METAL MAN FAILED TO INSTALL AVIONICS MODULE AIR DATA COMPUTER AIRLINES RESULTING IN SUBSEQUENT ABORT DUE TO NO AIRSPD INDICATION.

Narrative: ACFT WAS IN OUR HANGAR FOR SHEET METAL REPAIRS IN THE E AND E COMPARTMENT. WHEN I RECEIVED THE JOB CARD, THE REPAIR WAS DONE AND BOUGHT BY INSPECTION. THE ONLY THING REMAINING WAS THE INSTALLATION OF AN AVIONICS RACK CONTAINING THE WX RADAR, AND 2 AIR DATA COMPUTERS. I KNEW I WAS WORKING WITH AVIONICS, SOMETHING I'M NOT VERY FAMILIAR WITH, SO, I WAS BEING EXTRA CAREFUL TO MAKE ALL OF THE CONNECTIONS ON THE REAR OF THE RACK. ON MON I WAS INFORMED THAT THE ACFT ABORTED TKOF DURING THE WKEND DUE TO NO AIRSPD INDICATION. IT WAS FOUND THAT I FAILED TO CONNECT THE PITOT LINES, AND AIRSPD LINES ON THE FRONT OF THE AIR DATA COMPUTER BOXES. I'M SORRY TO SAY THAT I NEVER KNEW THAT AIR LINES WERE SUPPOSED TO BE CONNECTED TO THE FRONT OF THESE BOXES. WHEN I SLID THEM INTO THE RACKS ALL I REMEMBER SEEING WERE SMOOTH BLACK SURFACES. THE AIRLINES THEMSELVES WERE NOT DANGLING IN SIGHT. THEY HAD TO HAVE BEEN STUFFED INTO THE UPPER STRUCTURE OUT OF SIGHT, AND THEY DID NOT CARRY ORANGE STREAMERS TO MAKE THEM VISIBLE. I'M AT A LOSS TO EXPLAIN WHY I DIDN'T SEE THE CONNECTIONS ON THE FRONT OF THE BOXES. I KNOW THAT I MADE A SERIOUS MISTAKE AND REGRET THAT IT EVER HAPPENED.

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.