Final answer:
In aviation, pilots are instructed not to descend from the procedure turn fix altitude until established on the inbound leg and from the procedure turn completion altitude until established on the approach segment post-procedure turn and crossing the final approach fix.
Step-by-step explanation:
The subject of this question is aviation, specifically related to instrument flight procedure rules and regulations according to the Air Force Manual (AFMAN). When conducting an instrument approach that involves a procedure turn, there are certain altitude restrictions pilots must adhere to in order to maintain a safe and orderly approach to the runway.
Do not descend from the procedure turn fix altitude (published or assigned) until established on the inbound leg of the holding pattern or procedure turn and the aircraft is appropriately configured for landing or the approach. Do not descend from the procedure turn completion altitude until the aircraft is established on the segment of the approach after the procedure turn and the final approach fix has been crossed. Compliance with these altitude restrictions is necessary to ensure obstacle clearance and adherence to air traffic control requirements.