1. A method for executing at least one instruction in an on-board maintenance device from a remote system connected to the said maintenance device via a communication network, this method comprising the following steps: receiving at least one datum representative of at least one command associated with the said at least one instruction; filtering the said at least one received datum; and, in response to the said filtering step, if the said at least one received datum represents a valid command, conversion of the said at least one received datum to identify the said at least one instruction.