It may happen during a flight, that the flight crew faces a momentary FMS related problem. This may occur in cases where either a CAS message or FMS Control Display Unit (FMS CDU) message cannot be assessed, due to a condition that was rapidly cleared or the message itself did not provide enough information. To better investigate these events, the FMS has an internal Random Access Memory (RAM) that records such events that can then be downloaded to a USB memory stick for further analysis by the avionics supplier.

See page 10 of the following for more information:

• Customer Forum & Newsletter/NOVEMBER 18, 2014 / VOLUME 11 / ISSUE 23

There have been reports that during aircraft ground testing of the Enhanced Surveillance transponder installations that the Pre-Selected Altitude value broadcast was 80% of the value displayed on the cockpit PFDs. For example, with the Pre-Selected Altitude set to 10,000 feet, the transponder transmitted a Pre-Selected Altitude of 8,000 feet. The PFD displayed altitude was the correct value and the transmitted value was in error.

This anomaly will occur when the COM configuration straps have not been modified as required per Bombardier Service Bulletins 700-34-039 (Global Express/XRS) and 700-1A11-34-014 (Global 5000). Some operators may have overlooked the COM strapping instructions in the Service Bulletin which required jumpers W6 and W7 to be cut (OPEN) for Enhanced Surveillance transponder operation.

• Honeywell Technical Newsletter D200702000005
  Bombardier Infoservice Letter June 2006

This document is intended to provide help and advise on troubleshooting of weather radar systems:

• Troubleshooting Guide for Airborne Weather Radar

Refer to the following Advisory Wires for all the detail:

• AW700-34-0741 - FMS - Honeywell Primus 2000XP - Summary of Observations and Known Conditions

• AW700-34-0327 - Pre, Post Batch 3 and Batch 3.3 Upgrade - FMS Anomalies and Associated Navigation Database Changed
• AW700-34-0449 - Post Batch 3 Upgrade - FMS Performance
• AW700-34-0501 - Flight Management System (FMS) - Descent Angle changes upon Place-Distance (PD) HOLD Insertion
• AW700-34-0505 - Post Batch 3, Batch 3.3 and Batch 3.4 Upgrade - Flight Management System (FMS) - Incorrect Level Off at an Altitude Constraint.
• AW700-34-0539 - Flight Management System (FMS) - Lateral Guidance (LNAV) early intercept capture while in Heading (HDG) mode
• AW700-34-0560 - Post Batch 3, Batch 3.3 and Batch 3.4 - FMS - FLY VECTORS TO INTERCEPT leg deleted, resulting in incorrect course on Control Display Unit (CDU)
• AW700-34-0580 - Flight Management System (FMS) - Holding pattern speed anticipation function
• AW700-34-0590 - Post Batch 3, Batch 3.3 and Batch 3.4 Software upgrade - Flight Management System (FMS) - Incorrect ceiling altitude displayed on FMS
• AW700-34-0591 - Flight Management System (FMS) - Not honoring speed constraint when the TOGA button is activated on a missed approach and aircraft is in a GA mode.
• AW700-34-0604 - Flight Management System - Incorrect Distance Calculation for Equal Time Point (ETP)
• AW700-34-0605 - Post Batch 3.3 Upgrade - Flight Management System - Incorrect FLY OR AS ASSIGNED Heading on NZ6.1
• AW700-34-0606 - Post Batch 3 Upgrade - Flight Management System - Missed Approach Course Display Anomaly
• AW700-34-0607 - Flight Management System (FMS) - Navigation database altitude constraint missing from the active flight plan

Use the following EGPWS Troubleshooting Guide following the replacement/installation, repair to the connector or wiring of the EGPWS computer or whenever the integrity of the EGPWS needs to be validated.

If you are using computer or laptop operating with Windows 10 to download the latest Nav DB cycle from the ASDS (Aerospace Software and Data Services) web portal, you may run into the following issues:

1. Every time you try to load the NAV DB you get "CHECK DATA LOAD (85)" on the FMS scratchpad on FMS 1, 2 or 3 with USB stick in either USB port.
2. You may also have observed a "NO DISK INSTALLED" message while trying to load the NAV DB to the loader.

The following may have already been attempted in order to resolve the issue:

• Various USB disc size and FAT format
• Different serviceable DL-950 Data loader units
• Downloading the Nav DB from different accounts
• HYPERSTART procedure to reset the RAM memory on the FMS CCA inside the IAC

After investigation involving Honeywell Aerospace and Bombardier, it was discovered that the tool used by many operators to download the Nav DB on the ASDS web portal is not compatible with Windows 10.

Honeywell has therefore moved the NAV DB downloads to OneNav+ as it is a better option.

Customers can download and upgrade to OneNav+. It is compatible with Windows 10. This would require a registration and a license through account services (dsa@honeywell.com) for unregistered users. However, customers can download a trial version.

Link to the Honeywell ASDS web portal:

https://ads.honeywell.com/

Refer to the OneNav+ Installation Guide and the "Help" tab on the ASDS portal (see image below); It contains information on how the product works, including the drive formatting.

Drive formatting is still important with the use of the DL-950, dependent on MOD status.

As a reminder to prevent communication errors between the DL-950 Data loader and the IAC/FMS:

• For DL-950 prior to "MOD G", use 2G or less USB stick with FAT format (FAT16)
• For DL-950 "MOD G" or later and DL-1000, use any USB stick size with FAT or FAT32
• Verify that the individual NAV DB files from the ZIP file are extracted onto the USB stick rather than saving the compressed zip file only.
• When inserting the USB stick, up to ten (10) seconds may be required before the Data loader recognizes the USB device as available for upload /download. Attempting to access or load databases prematurely may result in the scratchpad error message "CHECK DATA LOAD (85)".

NOTE: Following feedback received from the fleet, USB sticks 4G and above with FAT32 is preferred with DL-950 "MOD G".