Final answer:
The inspection that is a combination of the Basic Post Operation and/or Hourly Postflight and periodic inspection requirements is known as a Phase Inspection in aviation maintenance.
Step-by-step explanation:
The inspection that combines parts of the Basic Post Operation (BPO) and/or Hourly Postflight (HPO) and periodic inspection requirements is typically referred to as a Phase Inspection.
Phase Inspections are used in aviation maintenance to ensure that aircraft meet specific safety and operational standards set forth by aviation authorities.
Unlike BPO and HPO that focus on operations immediately before or after a flight, and periodic inspections that occur at set time intervals, a Phase Inspection might be spread over several flights or operational hours, and includes elements of both types of inspections to provide a comprehensive assessment of an aircraft's systems and condition.