1. A method for executing at least one instruction having at least one parameter in an on-board maintenance device from a remote system connected to the maintenance device via a communication network, the method comprising: receiving at least one datum representative of at least one command having a correspondence with the at least one instruction and the at least one parameter of the at least one instruction; filtering the at least one received datum to exclude commands including characters that can be used to construct executable code; and in response to the filtering, if the at least one received datum represents a valid command, converting the at least one received datum to identify the at least one instruction and the at least one parameter of the at least one instruction based on stored correspondence information that maps the at least one datum to the at least one instruction and the at least one parameter of the at least one instruction.