Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
General Flight Cancelled / Delayed; General Maintenance Action
Aircraft; Human Factors
Upon arrival to ZZZZ I quickly went outside to do my preflight walk around. Upon return to the jetbridge all the passengers and rest of the crew were deplaned. Flight attendants said aircraft filled with fumes. I went to look inside the plane and surely it was full of fumes and a melted crayon smell. Poor and rushed maintenance procedures. Aircraft has history and same event happened within 30 days on the same aircraft. A better maintenance procedures overlook [recommended].
Air Carrier First Officer reported a fume event during preflight at gate. Passengers and flight crew deplaned during maintenance action.