As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON MASTER CAUTION RECALL PUSH THE LEFT PACK LIGHT ILLUMINATED. THE LIGHT WENT OUT WHEN MASTER CAUTION RESET WAS PUSHED. GROUNDED - YES. FOUND FAULT WITH RAM AIR EXHAUST FAULT AFTER PERFORMING PZTC BITE CHECK, PERFORMED PROCEDURES RESET DC PWR, SYSTEM OP CHECK GOOD IAW FIM 21-62 TASK 853, OK FOR SERVICE.