Purpose of a PAFI???
Perhaps looking at a door from different sides. The purposes of a Post Accident are unclear.
Is it to check the accuracy of the signals in space before the aid can be brought back into service?
Is it to have any significance in studying how the system failed?
My understanding is the latter case.
From Post 7; d) Accident/Incident flight inspections to determine the performance of all equipment, used or considered to have been used by the aircraft concerned, which could have contributed to the accident or incident. (No restriction to accuracy of signals in space.)
If it were the former then it could have been more cleanly stated.
To put bones on the question. Take the case of the NO incident in 1989 when a BA747 came very close to the Penta Hotel at Heathrow. Would a PAFI have simply looked at the signals at say 0300the next morning and said OK. Or would the PAFI perhaps have looked at the effect of a 747 moving slowly on the runway, looking for a turn-off in fog, and a subsequent delayed clearance to land? Perhaps someone in the FI community can say with significant certainty that the aircraft on the runway could not have been a factor.
A PAFI seems a process outwith CAP 670.
What is the purpose of a Post Accident flight and how is it accomplished? What is the required standard?