As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING MAINTENANCE PERFORMING AN APU REMOVAL, THE APU EXHAUST STUB WAS FOUND INCORRECTLY INSTALLED. THIS LEAD TO HOT EXHAUST ON THE FRAME AT BS 492.75 ON THE RT SIDE OF THE ACFT AND CARBON DEPOSITS EVIDENT THROUGHOUT THE TAILCONE, HORIZ/VERT STABILIZERS, ELEVATORS AND RUDDER. THE APU FUEL MANIFOLD WAS ALSO FOUND TO BE LEAKING.