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20211016016019I

Incident · No damage
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FAA incident report · Bombardier CL-600-2B19 · Chicago, IL · October 16, 2021

FAA Aviation Safety Information Portal

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Date
October 16, 2021 · 19:50 local
Place
Chicago, IL
Phase of flight
Taxi
Operating rules
Air carrier (Part 121)
Operator
A6WA
Damage
No damage
Aircraft
N423AW
Reported as
Bombardier CL-600-2B19
Reported engine
GE CF34 series
People aboard
28
Fatal injuries
0
Other injuries
0
Pilot’s certificate
Airline transport
Pilot’s flight hours
2,500 total
N423AWRegistered now · Bombardier CL-600-2B19S/N 7636 · Built 2002Airframe modelBombardier CL-600-2B19Engine modelGE CF34 seriesTurbo-fan

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

On October 16, 2021,privacy data omitted, a mitsubishi (Bombardier) CRJ200 (N423AW), taxied for departure at Chicago o'hare international airport. The flight was scheduled to fly to general mitchell milwaukee international airport (kmke). There were 25 passengers on board, with 3 crewmembers.

During taxi, the flight crew noticed an unusual odor. They confirmed the odor was present in the cabin with the flight attendant, and decided to return to the gate. The gate was occupied, and while the aircraft was taxiing to the "b" pad, the flight crew received numerous caution messages regarding the APU. The APU then shut down automatically. While parked in the "b pad" waiting for their gate to open, the flight attendant notified the flight crew there was smoke in the cabin.

The captain initiated evacuation via the pa system. The main cabin door and service door were utilized for the evacuation.

Investigation revealed an APU oil cooler line o ring leaking. The air/oil mixture was fed into the ac packs and caused the haze/smoke

As the FAA filed it

ON OCTOBER 16, 2021,^PRIVACY DATA OMITTED^, A MITSUBISHI (BOMBARDIER) CRJ200 (N423AW), TAXIED FOR DEPARTURE AT CHICAGO O'HARE INTERNATIONAL AIRPORT. THE FLIGHT WAS SCHEDULED TO FLY TO GENERAL MITCHELL MILWAUKEE INTERNATIONAL AIRPORT (KMKE). THERE WERE 25 PASSENGERS ON BOARD, WITH 3 CREWMEMBERS.

DURING TAXI, THE FLIGHT CREW NOTICED AN UNUSUAL ODOR. THEY CONFIRMED THE ODOR WAS PRESENT IN THE CABIN WITH THE FLIGHT ATTENDANT, AND DECIDED TO RETURN TO THE GATE. THE GATE WAS OCCUPIED, AND WHILE THE AIRCRAFT WAS TAXIING TO THE "B" PAD, THE FLIGHT CREW RECEIVED NUMEROUS CAUTION MESSAGES REGARDING THE APU. THE APU THEN SHUT DOWN AUTOMATICALLY. WHILE PARKED IN THE "B PAD" WAITING FOR THEIR GATE TO OPEN, THE FLIGHT ATTENDANT NOTIFIED THE FLIGHT CREW THERE WAS SMOKE IN THE CABIN.

THE CAPTAIN INITIATED EVACUATION VIA THE PA SYSTEM. THE MAIN CABIN DOOR AND SERVICE DOOR WERE UTILIZED FOR THE EVACUATION.

INVESTIGATION REVEALED AN APU OIL COOLER LINE O RING LEAKING. THE AIR/OIL MIXTURE WAS FED INTO THE AC PACKS AND CAUSED THE HAZE/SMOKE