What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(.4)The aircraft was pushed back from the gate, and both engines were started. The pneumatics were shifted from the auxillary power unit to the engines. Shortly thereafter, smoke was observed in the cockpit and cabin. The flightcrew donned smoke masks, and the captain commanded an emergency evacuation. During evacuation, 2 passengers were seriously injured, and 32 passengers received minor injuries. An investigation revealed that the source of the smoke was a hydraulic check valve failure, which allowed hydraulic fluid into the engine pneumatic duct. Investigation also noted that the 3R door evaucation slide did not deploy. Further investigation determined that the door did not fully open. Although, when manually pushed during the investigation, the door went fully open, and the slide deployed and inflated.
As the FAA filed it
(.4)THE AIRCRAFT WAS PUSHED BACK FROM THE GATE, AND BOTH ENGINES WERE STARTED. THE PNEUMATICS WERE SHIFTED FROM THE AUXILLARY POWER UNIT TO THE ENGINES. SHORTLY THEREAFTER, SMOKE WAS OBSERVED IN THE COCKPIT AND CABIN. THE FLIGHTCREW DONNED SMOKE MASKS, AND THE CAPTAIN COMMANDED AN EMERGENCY EVACUATION. DURING EVACUATION, 2 PASSENGERS WERE SERIOUSLY INJURED, AND 32 PASSENGERS RECEIVED MINOR INJURIES. AN INVESTIGATION REVEALED THAT THE SOURCE OF THE SMOKE WAS A HYDRAULIC CHECK VALVE FAILURE, WHICH ALLOWED HYDRAULIC FLUID INTO THE ENGINE PNEUMATIC DUCT. INVESTIGATION ALSO NOTED THAT THE 3R DOOR EVAUCATION SLIDE DID NOT DEPLOY. FURTHER INVESTIGATION DETERMINED THAT THE DOOR DID NOT FULLY OPEN. ALTHOUGH, WHEN MANUALLY PUSHED DURING THE INVESTIGATION, THE DOOR WENT FULLY OPEN, AND THE SLIDE DEPLOYED AND INFLATED.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.