Final answer:
This question relates to aviation regulations and safety concerns for pilots. The FAA has implemented limits on how long a pilot is allowed to fly without an overnight break to mitigate risks associated with fatigue.
Step-by-step explanation:
This question seems to be related to aviation regulations and safety concerns for pilots. The Federal Aviation Administration (FAA) has implemented limits on how long a pilot is allowed to fly without an overnight break in order to mitigate risks associated with fatigue and ensure the safety of flights.
Based on the given information, it states that flying-hour minimums can be reduced by 1 month for each __ day period that a crewmember was unable to fly. However, the specific value of the missing variable is not provided in the question. Without this missing information, it is not possible to give a precise answer.
Therefore, further clarification is needed regarding the value of the missing variable in order to calculate the reduction in flying-hour minimums.