What was found
DURING PDC FOUND RIGHT PACK AMBER LIGHT ON P5-10 ON. GROUNDED - YES. C/W FIM 21-53 TASK 802 RIGHT PACK LIGHT ILLUMINATED AND WILL NOT RESET. VERIFIED C/B IN. PUSHED TRIP RESET SWITCH LIGHT WENT OFF AND STAYED OFF. PER FIM WAS AN INTERMITTENT FAULT. ACCOMPLISHED BITE OF PACK/ZONE TEMP CONTROLLER REF AMM 21-61-00. BITE PASSED BOTH CONTROLLERS. PREV FLT NO FAULTS BOTH CONTROLLERS. VERIFY PASSED BOTH CONTROLLERS. RAN PACK FOR 30 MINUTES - NO FAULTS. DID SECOND TEST OF CONTROLLERS BOTH PASSED BITE, PREV FLT AND VERIFY.