Hi,
are you able to send SITA telexes?
If so, try to send a message to address QXSXMXS
with the format:
M3E
AN G-XXXX
- freetext starts here
Does not work anytime and with any aircraft but it is worth a try.
The Dash (-) in line three seems to be necessary.
The registration must include the dash too (G-XXXX).
Try it
Greets,
Alex