What are the flight limitations for part 121 in terms of daily, weekly, monthly, and yearly hours?

The flight limitations for part 121 operations specify the maximum number of hours that pilots can fly in various time frames to ensure safety and manage fatigue. The correct answer outlines these limitations as follows: a maximum of 8 hours of flight time in a single day, 32 hours in any 7 consecutive days, 100 hours in any 30 consecutive days, and 1,000 hours in a calendar year.

Understanding these limits is crucial for maintaining flight safety and pilot health, as they help prevent fatigue-related incidents that can occur from excessive flight time without adequate rest. The chosen answer accurately reflects the regulations that govern these operational limits under part 121, which applies to scheduled air carriers.

In contrast, other options either exceed the acceptable limits for daily, weekly, or monthly hours or do not align with the regulatory framework that oversees flight operations in commercial aviation, thus rendering them incorrect.