As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 1245 - EWR - FLIGHT CREW REPORTED SPS FAIL DURING PRE-FLIGHT TEST AND SMELLED SMOKE AFTER TEST. EWR MX PERFORMED OPERATIONAL CHECK OF SPS SYSTEM AND NO ABNORMALITIES WERE FOUND. FURTHER TROUBLESHOOTING FOUND EXTERNAL AIR CONDITIONING CART BAD. MX THEN PERFORMED OPERATIONAL CHECK OF AIR CONDITIONING SYSTEM SUCCESSFULLY. AIRCRAFT WAS APPROVED TO RETURN TO SERVICE.