Date: 202111
Local time of day: 1201-1800
Location: ZZZ.Airport, US
Flight conditions: VMC
Light: Daylight
Aircraft: A220-300
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Taxi
ATC / advisory: Ground ZZZ
Aircraft component: Pneumatic Control Valves
Component problem: Malfunctioning
Reporter organization: Air Carrier
Reporter function: Captain; Pilot Flying
Reporter qualification: Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Human factors: Troubleshooting; Time Pressure; Human-Machine Interface; Communication Breakdown
Anomaly: Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Maintenance
Detector: Automation Aircraft Other Automation; Person Flight Crew
When detected: Taxi
Result: Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Overcame Equipment Problem; General Flight Cancelled / Delayed
Contributing factors: Aircraft; Human Factors; Procedure
Primary problem: Aircraft

Narrative: Aircraft X; A220; ZZZ to ZZZ1; taxiing to XXR for takeoff. Started 2nd engine during taxi. Shortly after start; got: LH ENG FAULT" - cyan EICAS. "30 - LH ENG COWL AI REDUND LOSS" - info synoptic. Coordinated with ATC to pull over and assess our options. Quick check of MEL showed no available MEL to apply to this message. Called Dispatch/Maintenance Control to discuss. Maintenance Control confirmed no applicable MEL. Decided to conference call Airbus Tech Representative; Name; for any additional insight. Name had information about this condition and suggested: shut down LH engine; restart LH engine - swaps channels; shut down LH engine 2nd time; [and]; restart LH engine - swaps back to original channel that triggered our LH ENG COWL AI message. After accomplishing these restarts our COWL AI message had cleared.We were then instructed to run up the engine to approximately 80% N2; and then manually turn the LH Wing AI ON. We did this with Maintenance Control and the Airbus Representative on our conference call. The engine was operated at approximately 82% N2 for roughly 5 seconds while the Cowl AI was operated. Everything now worked normally; and the system had been reset. Maintenance Control advised that a logbook entry would not be required since we were able to reset the EICAS message... the problems we had encountered could be considered "transient" and we were authorized to continue our flight without logbook entries to address. The entire conference call and reset took approximately 20 minutes; and we were able to initiate our takeoff roll with minimum takeoff fuel +150 lb.After we had climbed above 10K; I researched the FOM for engine runs with customers onboard and discovered that we should have limited thrust to idle power for that situation. This was my fault as I did not realize the specific details about our engine run policy with customers onboard."




Synopsis: A220-300 Captain reported rejecting takeoff due to an engine fault and while troubleshooting the engine fault; the engines runs exceeded the recommended limitations with customers onboard.