The Joint Aviation Authority requires that each one multi-engine turbine-powered plane with a most take-off weight in extra of 5700kg and with seating for greater than 9 passengers ought to be geared up with cockpit voice recorders. The voice recorder have to be able to retaining recorded info over the interval of the final 2 hours of operation and the parameters recorded have to be as follows:
-All radio voice communications acquired or transmitted from the flight deck.
-All sounds inside the flight deck atmosphere, together with audio alerts acquired by every increase and mask microphone in use.
-Voice communications between flight crew members on the interphone methods.
-All voice or audio alerts figuring out navigation or method aids, as acquired on crew headphones or speakers 믹싱.
-All bulletins made by the flight crew on the general public tackle system.
-For plane with a most take-off weight of lower than 5700 kg the recording time could also be restricted to half-hour.
The cockpit voice recorder should robotically start recording earlier than the plane first strikes beneath its personal power and proceed till it’s now not able to moving beneath its personal power. In sensible phrases, that is normally from first engine begin to final engine shut-down.
Black box flight recorders
Generally referred to as black box flight recorders, cockpit voice recorders should not black in any respect. The voice recorder container have to be simple to find in a crash state of affairs by portray it a particular orange or yellow color with reflective materials connected. It should additionally embrace an robotically activated underwater detection machine and it have to be proof against shock, warmth and hearth.
The recorder have to be put in in a location the place its recordings are least more likely to undergo harm. The location chosen is normally as far aft as practicable, sometimes near the rear pressure bulkhead. It should obtain its electrical power from a bus bar that may be relied upon to proceed offering power beneath all circumstances and that’s separate from the plane’s important and emergency services.
There have to be a method of preflight checking cockpit voice recorders for serviceability. An plane could solely be dispatched with an unserviceable recorder supplied that the technique of repairing it should not out there and that the plane doesn’t full greater than eight subsequent consecutive flights with the machine unserviceable.
