What was found
DURING SCHEDULED C-1 CHECK WHILE PERFORMING OTHER MAINTENANCE, FOUND THE APU COMPARTMENT FS 447-477, WL 180-200 SKIN WITH ELONGATED HOLES AND INCORRECT RIVET TYPES. REPAIR BY REPLACEMENT ACCOMPLISHED, IAW LOCKHEED SMP583 SRM, CH 51-60 & 51-70. NR 7020.