As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALL BLEED AIR TUBE IN LEFT WING CENTER SECTION. USING ICE PICK ON SUSPECT COROSION BLISTERS, TUBE COULD BE PUNCTURED EASILY. TUBE REMOVED FOR REPLACEMENT, 1 PIN HOLE ON TOP OF TUBE. HOLES LOCATED 8 TO 9 INCHES INBOARD OF COUPLING HOSE END OF TUBE.