As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT AFTER SECOND ENGINE START, GOT A STRONG BURNING RUBBER SMELL. THEN LOST ALL CONDITIONED AIR TO COCKPIT. REMOVED DEFECTIVE ACM P/N 586110-9, S/N 3001 & INSTALLED A REPAIRED ACM P/N 586110-9, S/N 104-2749 FOR REPLACEMENT IAW MM 21-51-16 LEAK CHECKS & OPS CHECKED IAW 21-51-00 WITH NO DEFECTS NOTED.