What was found
AIRCRAFT WAS GROUNDED: RIGHT PACK FAILURE ONE HOUR INTO FLIGHT-PER CHECKLIST RESTORED TO NORMAL OPERATIONS. FAILURE AGAIN 20 MINUTES LATER, REMAINED FAILED PER CHECKLIST REPEAT WRITE UP TIMES FOUR. RE-BONDED DISLODGED STANDOFF PER AARD 21-55-00-1. TROUBLESHOT PER FIM 21-50-F2-47A-421A-A STEPS 1.B.2 THROUGH 1.B.5. LOOP R1A, 171-10R, SHOWS NO SHORT TO GROUND. INSULATION RESISTANCE WITHIN LIMITS, ELEMENT RESISTANCE WITHIN LIMITS, NO VISIBLE EVIDENCE OF PHYSICAL DAMAGE TO LOOP. REATTACHED OVERHEAT STANDOFF LOOP.