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(2014) Service Bulletin 1407: GTR 225/GNC 255 Software Upgrade to COM Software Version 2.13


CERTIFICATION APPROVAL: TSO Authorization

COMPLIANCE: Recommended.

PURPOSE:

COM Software Version 2.13 contains the following changes from Version 2.12:

  • Reduced noise burst (open squelch) that can occur after transmitting, flip-flopping frequencies, or exiting monitor mode when the receiver is set for high sensitivity.

The following service documents have been resolved:

  • Corrected issue with the MIC1 and MIC2 gain settings being transposed in Configuration Mode (Installation Bulletin 1359)
  • Corrected issue in limited circumstances where a monitored COM frequency may prevent the pilot from receiving communication on the active COM frequency (Service Advisory 1370)

Attachments