As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON TAKEOFF THE MASTER CAUTION, AIR CONDITION LIGHT ILLUMINATED AS WELL AS THE COWL ANTI ICE LIGHT. THE TAKEOFF WAS ABORTED AT LESS THAN 80 KNOTS AND THE ACFT RETURNED TO THE GATE. MAINTENANCE FOUND THE CONNECTOR TO THE PRESSURE SWITCH WAS NOT DISCONNECTED AND STOWED IAW MEL 30-3-2, CONDITION 2. THE ACFT HAD BEEN PUT ON MEL RESTRICTIONS WHEN IT ARRIVED AT THE GATE PRIOR TO THIS EVENT FOR THE NR 2 ENGINE TAI VALVE OPEN LIGHT ILLUMINATING ON TAXI. DETAILS OF THIS INCIDENT WILL BE FOLLOWED UP VIA SAFETY MANAGEMENT SYSTEM.