What was found
ON THE TAKEOFF ROLL, AS THE CREW APPROACHED V1 (AT ABOUT 130 KIAS) THEY RECEIVED A WING OVERHEAT CAUTION MESSAGE AND DECIDED TO REJECT THE TAKEOFF. ONCE THEY WERE OFF, THE CREW MADE AN ANNOUCEMENT TO THE PAX OF WHAT OCCURRED, AND ALSO CONTACTED MAINTENANCE. THEY THEN TAXIED BACK TO THE GATE WITH NO FURTHER ISSUES. UPON INSPECTION OF RIGHT HAND PRSOV NO DAMAGE FOUND. FOUND LEFT HAND PRSOV LOWER CANNON PLUG NOT SECURED. RESECURED LEFT HAND PRSOV LOWER CANNON PLUG, IAW CRJ900 AMM 36-12-01-400-801- A01. PRSOV AND WING A/I OPERATIONS CHECK GOOD, IAW CRJ900 AMM 36-12-01-710-801-A01 AND 30-12-00-710-801.