When filing a PIREP using either of the above ACARS we are getting errors. By clicking once to file it is getting filed, however error messages are returned to the ACARS. If you 'click" file again it creates a duplicate. We have auto accept set to ‘true’ - We are not using the auto accept module.
With kACARS the error is this Capture.jpg and with 
smartCARS error - 
What auto accept have you set to true? Have you tried disabling it?
What auto accept have you set to true? Have you tried disabling it?
No auto module - this was the code change - tried resetting back to pirep_pending and still the same issue.
AutoAccept
File: core/common/PIREPData.class.php line 703
$pirepdata[‘accepted’] = PIREP_PENDING;
change to
$pirepdata[‘accepted’] = PIREP_ACCEPTED;
Take a look here if you still have this problem and this will be your fix i fought this for months and then fixed it finally please take a look at this this post.