Where can crew members find revised holdover times?

Revised holdover times are crucial information for crew members, particularly related to winter operations and the management of de-icing or anti-icing procedures. The correct source for this information is the Aircrew Portal and Electronic Flight Bags (EFBs). These platforms are regularly updated to reflect the most current data, including holdover times, which can change based on weather conditions and regulatory updates.

The Aircrew Portal serves as a centralized resource where pilots and crew can access important operational information, including revised holdover times. EFBs also provide on-the-go access to flight-related documentation and updates, making it easy for crew members to stay informed about critical safety guidelines.

Other sources such as the Aircraft Maintenance Manual, Pilot's Handbook, or ATC communication may not provide the specific and updated holdover times required for safe operational decisions. The Aircraft Maintenance Manual is focused more on maintenance guidelines rather than operational procedures, while the Pilot's Handbook may not be exclusively dedicated to this topic. Relying on verbal communication with ATC for intricate operational data like holdover times would not be advisable as it lacks the reliability and timeliness compared to dedicated resources like the Aircrew Portal and EFBs.