There are a couple of relevant threads running on the Flyer forum in light of this tragic accident.
Aviation Forums for pilots - from FLYER Magazine
Aviation Forums for pilots - from FLYER Magazine
From the Irish AIP: -
ENR 1.10.5. Closing a Flight Plan
Outside the State flight plans shall be closed in accordance with the requirements of the appropriate ATS authority. Within the State, whenever a flight plan has been submitted in respect of all or portion of a flight, it shall
be closed either on termination of the flight or on completion of that portion of the flight for which the flight plan was submitted, such closure being effected by one of the methods outlined hereunder;
ENR 1.10.5.1. An arrival report shall be made, either in person, by radio or telephone or via data link at the earliest possible moment after landing to the appropriate air traffic services unit at the aerodrome of arrival in respect of any flight for which a flight plan has been submitted covering the entire flight or the remaining portion of a flight to destination.
ENR 1.10.5.2. When communication facilities at the aerodrome of arrival are known to be inadequate and alternative arrangements for the handling of arrival reports on the ground are not available, the following action shall
be taken:
Immediately prior to landing the aircraft shall, if practicable, transmit by radio or via data link to an appropriate air traffic services unit a flight plan closure message in accordance with paragraph (14) of this Rule; Normally this transmission shall be made to the aeronautical station serving the air traffic services unit in charge of the flight information region in which the aircraft is flying, and an acknowledgement shall be received.
ENR 1.10.5.3. When a flight plan has been submitted only in respect of a portion of a flight other than the remaining portion of a flight to destination, it shall be closed by transmission of a flight plan closure message by radio or via data link to the appropriate air traffic services unit. If it is not practicable to close the flight plan by the methods detailed or when no air traffic services unit exists at the aerodrome of arrival, the arrival report shall be made by telephone or other appropriate means of communication to the nearest air traffic services unit as soon as practicable after landing.
ENR 1.10.5.4. Arrival reports made by aircraft shall contain at least the following elements of information:
a) aircraft identification;
b) aerodrome of departure;
c) time of arrival;
d) aerodrome of arrival;
e) Destination aerodrome if different to (d) above.
ENR 1.10.5.4.1. A flight plan closure message shall contain at least the following elements of information:
a) aircraft identification;
b) aerodrome of departure;
c) aerodrome of destination;
d) position at which flight plan is being closed;
e) time at which flight plan is being closed.