114131 when an air traffic services unit is aware

11.4.1.3.1 When an air traffic services unit is aware that
an aircraft in its area is experiencing radiocommunication
failure, an RCF message shall be transmitted to all subsequent
ATS units along the route of flight which have already
received basic flight plan data (FPL or RPL) and to the
aerodrome control tower at the destination aerodrome, if basic
flight plan data has been previously sent.
11.4.1.3.2 If the next ATS unit has not yet received basic
flight plan data because it would receive a current flight plan
message in the coordination process, then an RCF message
and a current flight plan (CPL) message shall be transmitted to
this ATS unit. In turn, this ATS unit shall transmit an RCF
message and a CPL message to the next ATS unit. The above

11-6 Air Traffic Management (PANS-ATM)
1/11/01
process shall be repeated progressively from centre to centre
up to the first ATS unit along the remaining route of flight to
which basic flight plan data has already been sent.
11.4.2 Movement and control messages
11.4.2.1 Messages concerning the intended or actual
movement of aircraft shall be based on the latest information
furnished to air traffic services units by the pilot, the operator
or its designated representative, or derived from ground-
based radar.
11.4.2.2 F
ILED FLIGHT PLAN MESSAGES AND
ASSOCIATED UPDATE MESSAGES
11.4.2.2.1 Filed flight plan messages and associated
update messages comprise:
— filed flight plan messages (11.4.2.2.2)
— delay messages (11.4.2.2.3)
— modification messages (11.4.2.2.4)
— flight plan cancellation messages (11.4.2.2.5)
— departure messages (11.4.2.2.6)
— arrival messages (11.4.2.2.7).
11.4.2.2.2 F
ILED FLIGHT PLAN
(FPL)
MESSAGES
Note.— Instructions for the transmission of an FPL
message are contained in Appendix 2.
11.4.2.2.2.1 Unless repetitive flight plan procedures are
being applied or current flight plan messages are being
employed, filed flight plan messages shall be transmitted for
all flights for which a flight plan has been submitted with the
object of being provided with air traffic control service, flight
information service or alerting service along part or the whole
of the route of flight.
11.4.2.2.2.2 A filed flight plan message shall be
originated and addressed as follows by the air traffic services
unit serving the departure aerodrome or, when applicable, by
the air traffic services unit receiving a flight plan from an
aircraft in flight:
a) an FPL message shall be sent to the ACC or flight
information centre serving the control area or FIR
within which the departure aerodrome is situated;
b) unless basic flight plan data are already available as
a result of arrangements made for repetitive flight
plans, an FPL message shall be sent to all centres in
charge of each FIR or upper FIR along the route
which are unable to process current data. In addition,
an FPL message shall be sent to the aerodrome
control tower at the destination aerodrome. If so
required, an FPL message shall also be sent to flow
management centres responsible for ATS units along
the route;
c)