What was found
CLE - FLIGHT 4378, THE CREW REPORTED A STRONG SMOKE SMELL WHEN OPERATING ONLY PACK ONE ON THE GROUND. MAINTENANCE REMOVED AND REPLACED THE NUMBER ONE AIR CYCLE MACHINE, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CLE - FLIGHT 4378, THE CREW REPORTED A STRONG SMOKE SMELL WHEN OPERATING ONLY PACK ONE ON THE GROUND. MAINTENANCE REMOVED AND REPLACED THE NUMBER ONE AIR CYCLE MACHINE, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.