As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI IN, AFTER STARTING THE APU AND TURNING ON APU AIR. THE CABIN FILLED WITH A THIN HAZE AND A SLIGHT BURNING ODOR WHEN AWAY WHEN APU AIR WAS REMOVED. PULLED AND COLLARED APU CIRCUIT BREAKERS. FOUND RT ELEVATOR ACCUMULATOR LEAKING IN TAIL COMPARTMENT. R & R THE RT ELEVATOR ACCUMULATOR IAW AMM 27-33-04. OPS OK, NO LEAKS.