As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL430 SMELLED AND SAW SMOKE IN THE COCKPIT. TROUBLESHOT TO FAILED ACM ON AFT ECU. GAINED ACCESS AND REMOVED FAILED PART. INSTALLED REPAIRED ACM IAW MM 21-51-00. SYS OPS AND LEAK CHECK GOOD. REPLACED BOTH WATER SEPARTOR COALESCER CLOTHS PN 246451-3 WITH NEW CLOTHS IAW MM 12-10-01.