341115 again...
JetDoc,
In post 41 you will see the list of the 24 ACARS messages
In the third from bottom to top you will find the wording "34111506", among other things, which, as already discussed here, relates to the ATA code 34-11-15 which directs to the pitot tube (-s ?). The 06 relates to the flight phase (cruise)
I don't know if "Troubleshooting Manual" equals "Maintenance Manual". So in the "Troubleshooting Manual" - if it differs from the "maintenance manual" - maybe there is some other reference linked to the pitot tube(s) - in other words, linked to the same code 34-11-15.