As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GETTING A BURNING ODOR IN THE CABIN AND COCKPIT, POSSIBLE PACK IS FAILING. REMOVED AND INSTALLED NEW COALESCER IN BOTH THE COCKPIT & CABIN WATER SEPERATORS. RAN APU AND OPS CHECKED AND LEAK CHECKED GOOD. WORK DONE I.A.W. CE 750 AMM CHAPTER 21-51-00