Marshy76
15th Aug 2012, 10:20
G'day Gurus,
I have one out of left field here.
Background. We operate two 737 BBJ aircraft that have the following equipment on board:
FANS 1/A capable running Smiths FMS with FMC software 10.8A installed
INMARSAT and IRIDIUM SATCOM systems running Swift Broadband (via a HSD440 unit), cockpit and cabin voice etc. I-4 and I-3 SAT capable.
ACARS (provider is ARINC Direct). SATCOM datalink provider is INMARSAT/STRATOS
We are currently experiencing a rather strange problem. When our jets are communication purely via our SATCOM (outside VHF datalink coverage) we are seeing intermittent CDU messages: SAT NOCOMM and DATALINK NOCOMM. We seem to be able to use our ACARS ok (to retrieve text weather, D-ATIS etc) but as soon as we attempt a log on to CPDLC the system basically becomes unusable. CPDLC when connected via VHF datalink works fine. Our SATCOM systems were upgraded mid last year and we've been experiencing these issues ever since. Our internet and voice services are working perfectly.
As a side note, we are acutely aware of the known FMC software issues regarding the use of SATCOM datalink and CPDLC. This appears to be a separate issue. (Incidentally, the Boeing FCOM bulletin that addresses the issue of reduced FMC performance works well. Used it in anger the other day)
Any thoughts on this one?
Thanks in advance.
I have one out of left field here.
Background. We operate two 737 BBJ aircraft that have the following equipment on board:
FANS 1/A capable running Smiths FMS with FMC software 10.8A installed
INMARSAT and IRIDIUM SATCOM systems running Swift Broadband (via a HSD440 unit), cockpit and cabin voice etc. I-4 and I-3 SAT capable.
ACARS (provider is ARINC Direct). SATCOM datalink provider is INMARSAT/STRATOS
We are currently experiencing a rather strange problem. When our jets are communication purely via our SATCOM (outside VHF datalink coverage) we are seeing intermittent CDU messages: SAT NOCOMM and DATALINK NOCOMM. We seem to be able to use our ACARS ok (to retrieve text weather, D-ATIS etc) but as soon as we attempt a log on to CPDLC the system basically becomes unusable. CPDLC when connected via VHF datalink works fine. Our SATCOM systems were upgraded mid last year and we've been experiencing these issues ever since. Our internet and voice services are working perfectly.
As a side note, we are acutely aware of the known FMC software issues regarding the use of SATCOM datalink and CPDLC. This appears to be a separate issue. (Incidentally, the Boeing FCOM bulletin that addresses the issue of reduced FMC performance works well. Used it in anger the other day)
Any thoughts on this one?
Thanks in advance.