Narrative:
SkyWest Airlines flight 5869, a Bombardier CL 600-2C10, N796SK, experienced a left engine undercowl fire while landing at Denver International Airport, Colorado (KDEN). The flight crew reported that they received a L ENG SRG OPEN caution followed by a L ENG FIRE warning after stowing the thrust reversers. Both fire extinguishing bottles were discharged but the fire continued. Fire was observed at the left engine inlet, left engine aft pylon, and on the ground below the left nacelle and an emergency evacuation was initiated on the taxiway. The fire was extinguished by airport rescue and firefighting. There were no injuries to the 59 passengers and crew members onboard. The airplane was substantially damaged by the fire.
Probable Cause: The fuel supply tube fitting pulling out of the left engines operability bleed valve (OBV) during the landing rollout, allowing fuel to leak and contact hot engine cases, which ignited a fire that caused thermal damage to the engine pylon. Contributing to the fitting pullout from the OBV was an undetected progressive environmental control system (ECS) support link wear condition that allowed excessive OBV movement relative to the engine, and the lack of alignment instructions in the base engine assembly drawing and the lack of maintenance tasks to assess the operational condition of the ECS links.
| Status: | Accident investigation report completed and information captured |
| Date: | Sunday 2 July 2017 |
| Time: | 0.0019609928131104 |
| Type: |  Canadair CL-600-2C10 Regional Jet CRJ-701ER |
| Operating for: | United Express |
| Leased from: | SkyWest Airlines |
| Registration: | N796SK |
| MSN: | 10300 |
| First flight: | 2010 |
| Engines: | 2 General Electric CF34-8C5B1 |
| Crew: | Fatalities: 0 / Occupants: 3 |
| Passengers: | Fatalities: 0 / Occupants: 56 |
| Total: | Fatalities: 0 / Occupants: 59 |
| Aircraft damage: | Substantial |
| Aircraft fate: | Repaired |
| Location: | Denver International Airport, CO (DEN) ( United States of America)
|
| Phase: | Landing (LDG) |
| Nature: | Domestic Scheduled Passenger |
| Departure airport: | Aspen-Pitkin County Airport, CO (ASE/KASE), United States of America |
| Denver International Airport, CO (DEN/KDEN), United States of America | |
| Flightnumber: | UA5869 |
SkyWest Airlines flight 5869, a Bombardier CL 600-2C10, N796SK, experienced a left engine undercowl fire while landing at Denver International Airport, Colorado (KDEN). The flight crew reported that they received a L ENG SRG OPEN caution followed by a L ENG FIRE warning after stowing the thrust reversers. Both fire extinguishing bottles were discharged but the fire continued. Fire was observed at the left engine inlet, left engine aft pylon, and on the ground below the left nacelle and an emergency evacuation was initiated on the taxiway. The fire was extinguished by airport rescue and firefighting. There were no injuries to the 59 passengers and crew members onboard. The airplane was substantially damaged by the fire.
Probable Cause:
Probable Cause: The fuel supply tube fitting pulling out of the left engines operability bleed valve (OBV) during the landing rollout, allowing fuel to leak and contact hot engine cases, which ignited a fire that caused thermal damage to the engine pylon. Contributing to the fitting pullout from the OBV was an undetected progressive environmental control system (ECS) support link wear condition that allowed excessive OBV movement relative to the engine, and the lack of alignment instructions in the base engine assembly drawing and the lack of maintenance tasks to assess the operational condition of the ECS links.
Accident investigation:
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Classification:
Damaged on the ground
Photos
Video, social media
CBS46 reports Plane on fire makes emergency landing https://t.co/ctOVLopqIA pic.twitter.com/9xcFvonC6I
Channel 1 Atlanta (@channel1atlanta) July 3, 2017
Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Aspen-Pitkin County Airport, CO to Denver International Airport, CO as the crow flies is 200 km (125 miles).
Distance from Aspen-Pitkin County Airport, CO to Denver International Airport, CO as the crow flies is 200 km (125 miles).
This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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