What was found
PHX: DURING 15K CHECK CHAFING FROM AIR CONDITIONING PACK PRESSURE REGULATOR WAS FOUND ON FRAME WEB, FS 1381, LONGERON 4L TO 6L. REMOVED DAMAGED MATERIAL AND INSTALLED REPAIR DOUBLER IAW DC9 SRM 53-01, FIG. 7. ALSO REPOSITIONED PRESSURE REGULATOR.