Date: 202001
Local time of day: 1201-1800
Location: ZZZ.Airport, US
Aircraft: EMB ERJ 140 ER/LR
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Climb
Airspace: Class B ZZZ
ATC / advisory: TRACON ZZZ
Aircraft component: Air Conditioning and Pressurization Pack
Component problem: Malfunctioning
Reporter organization: Air Carrier
Reporter function: Pilot Not Flying; First Officer
Reporter qualification: Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Anomaly: Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Detector: Person Flight Crew
When detected: In-flight
Result: Flight Crew Returned To Departure Airport; Flight Crew Landed As Precaution; General Maintenance Action
Contributing factors: Aircraft
Primary problem: Aircraft

Narrative: On climbout at around 13;000 feet smoke was detected in the cockpit. The Flight Attendant called and said it was in the cabin as well. Memory items were completed for [a] smoke event. We asked for lower from ATC and executed [a] smoke removal checklist as we had no EICAS messages to lead to a Quick Reference Handbook (QRH). After [the] smoke removal checklist; smoke was removed and did not return. During this process we had contacted dispatch and ATC and arranged for a return to departure airport. We ran the overweight landing QRH and prepared for landing. The Captain landed the aircraft at probably 100 feet per minute. After landing we stopped on Taxiway X and had Fire Rescue inspect the exterior of the aircraft for signs of damage; smoke or fire. They reported the aircraft appeared to be in good condition so we taxied to the gate and deplaned. There were no passengers injured or issues reported to us.Apparently the ACM on PAC 1 seized causing the smoke event.We got this airplane back with it 'fixed.' The oxygen system had not been recharged. During the flight that night we had no temperature control on PAC1 leading to an MEL on arrival. The next day prior to push back a loud pop occurred. A hose had been blown off of PAC2. Five to six hose clamps on PAC2 were loose or installed wrong. Also a hose clamp was found in the belly of the plane not connected to anything. PAC1 was inspected and found to have a blown hose as well which was the home of the found hose clamp. Once everything was reinstalled and inspected an ops check was performed on the ground; everything appeared OK so the MEL was removed from PAC1. During climbout a PAC1 overload EICAS was received. The QRH was run for this and cleared the issue. However there was a strong metallic burnt toast smell present with PAC1 running. This issue was written up on arrival. The suggestion would be can we please ensure that our maintenance is actually fixing issues and fully investigating issues instead of rushing to return aircraft to service that could be potentially unsafe with 47-50 souls aboard.




Synopsis: EMB-140 First Officer reported returning to departure airport after experiencing smoke in the cockpit and the cabin related to an air conditioning pack issue.