As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT UNDERGOING A/B SCHEDULED CHECK, PERFORMED BOROSCOPE INSPECTION OF HORIZONTAL STABILIZER RIBS FOR CRACKS IAW 400A ALM 04-00-02-001. FOUND NUMEROUS CRACKS FROM FASTENER HOLES AT 12 LOCATIONS ON LEFT STABILIZER RIBS, LOWER ATTACH LEGS. REMOVED STABILIZER FOR INSTALLATION OF S/B 55-4071, KIT #128-6200-1.