As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING ANNUAL INSPECTION, THE LOWER LONGITUDINAL FRAME OF THE STAINLESS STEEL FIREGATE P/N 80450-1 WAS NOTED TO BE CRACKED AT THE FWD END AND BULGED AT THE AFT END. (2) OTHER AC HAVE SIMILAR DAMAGE. WATER WAS FOUND IN THE TUBE AND THE DAMAGE APPEARS TO BE CAUSED BY WATER FREEZING. (TC NR 20070313009)