What is the maximum deviation error allowed in a magnetic direction indicator installed in a helicopter?

The maximum deviation error allowed in a magnetic direction indicator installed in a helicopter is 10 degrees. This standard is set to ensure that pilots can accurately determine their heading, which is crucial for safe navigation. The magnetic direction indicator is an essential piece of equipment that provides flight crews with reliable information about their orientation relative to magnetic north.

If the deviation exceeds this limit, it could lead to navigational errors, affecting flight safety and the overall operational integrity of the helicopter. Regulations established by aviation authorities typically dictate these allowable limits since they help maintain consistent safety standards across different aircraft. Reviewing the specific requirements from the Federal Aviation Administration (FAA) or similar regulatory bodies can provide further clarity on these standards.