[Mark_Samp]

Here try this :

PHP код:

if(strcmp(cmdtext,"/jetpack",true) == 0)
    {
        if(IsPlayerAdmin(playerid)) //You need to be logged with rcon to use this command you can edit it 
        {
        new Float:X,Float:Y,Float:Z;
        GetPlayerPos(playerid,X,Y,Z);
        SetPlayerPos(playerid, X, Y, Z);
        SetPlayerSpecialAction(playerid,SPECIAL_ACTION_USEJETPACK);
        SendClientMessage(playerid, 0x15FF00AA, "* You Have Succefully Spawned Jetpack");
        }
        else
        {
              SendClientMessage(playerid, 0xFF0000FF, "[ERROR]: You need to be RCON admin to use this command");
        }
        return 1;
    } 


I didn't test it but i hope it work
Tell me if it worked