As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE PILOTS WERE DOING TRAINING, THEY NOTICED AN INCREASE IN TOT. DID A POWER CHECK AND FOUND THAT THE ENGINE WAS BELOW SPEC. AIRCRAFT RETURNED TO BASE AND IT WAS DISCOVERED THAT THE THERE WAS A 1 INCH CRACK THAT FOLLOWED A WELD IN THE E ARM PIT AREA. NOTE: IN THIS REGION THERE IS A MESHED DOUBLER.