What was found
EXTERNAL SKIN AT STA 918, STRINGER 4R (EMPENNAGE ON RT SIDE) HAS A 2 INCH LONG CRACK. REMOVED CRACKED SECTION OF SKIN, FABRICATED REPAIR DOUBLER, (2) FILLERS, (2) FINGER DOUBLERS, ALODINED, PRIMED & INSTALLED PER DC9 SRM 53-04 FIGURE 12B, PG 54, 56, 60 BV, 60JC, 53-30-0, PG 18-21, 51-10-3, PG 20, & 23-24. REPETITIVE INSPECTION REQUIRED EVERY 8,000 CYCLES PER DC9 SRM 53-04 FIGURE 12B, PG 33, PAR B.