EASA SIB CASA-2021-10
Take-off with Incorrect Throttle Setting
Summary
Transport Canada Civil Aviation Safety Alert CASA 2021-10 is a safety alert addressing takeoff incidents involving incorrect throttle settings on Airbus Canada BD-500-1A10 and BD-500-1A11 aeroplanes (A220-300). The alert highlights occurrences where thrust levers were set below the correct takeoff thrust, causing spoiler deployment issues and autothrottle engagement failures during takeoff. It provides background on investigations and communications from Airbus Canada regarding proper thrust lever settings and autothrottle management.
What Changed
CASA 2021-10 introduces awareness of the risks associated with incorrect throttle settings during takeoff on Airbus BD-500-1A10 and -1A11 aircraft. It communicates Airbus Canada's revised Flight Crew Operational Manual (FCOM) Volume 2 Issue 016D and All Operator Message CS-AOM-00-00-0037, emphasizing correct thrust lever angles and autothrottle engagement procedures. The alert also announces forthcoming revised training instructions to improve flight crew understanding of autothrottle and ground lift dump control logic during takeoff.
Why It Matters
This alert is critical for aviation professionals as incorrect throttle settings during takeoff can lead to premature spoiler deployment and compromised aircraft performance, potentially affecting safety margins. Operators and flight crews must ensure proper thrust settings to avoid extended takeoff distances and unexpected aircraft behavior. Compliance with updated procedures and training reduces operational risks and enhances flight safety for the affected Airbus A220 models.
What To Do
Flight crews should familiarize themselves with Airbus Canada All Operator Message CS-AOM-00-00-0037 and operators should incorporate Airbus Canada FCOM Vol. 2 Issue 016D into their procedures. Once available, operators must update training programs to include the revised instructions on autothrottle and throttle lever management during takeoff. Transport Canada will continue to evaluate the issue and may issue further recommended or mandatory corrective actions as necessary.