As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)WHILE PERFORMING ENGINE RUN-UP, NOTICED A LOW ITT ON THE LEFT ENGINE. FURTHER INVESTIGATION REVEALED THE LOCKWIRE SECURING THE BALANCE RESISTOR BOX WAS TOUCHING A CONTROL CABLE AND THUS GROUNDING OUT GIVING THE SYSTEM A FALSE INDICATION. SUBMITTER SUSPECTS THE BOX WAS PROBABLY MOVED WHILE WORKING IN THE AREA OF THE ENGINE. BALANCE RESISTOR WAS SECURED.