(2009) Service Advisory 0908 Rev A: Garmin Integrated Flight Deck systems may display a DME failure indication (Red-X) upon power-up if the Honeywell KN63 DME is not receiving a valid DME signal

AFFECTED PRODUCTS

All Garmin Integrated Flight Deck systems with GDU Software v8.20 through v9.01 (inclusive) and equipped with the Honeywell KN63 DME are affected.

DESCRIPTION

Garmin Integrated Flight Deck systems with GDU Software v8.20 through v9.01 and equipped with the Honeywell KN63 DME may display a Red-X in the DME Information Window and the DME TUNING Window upon power-up if the Honeywell KN63 DME is not receiving a valid DME signal. The Red-X is removed only after a valid DME signal is received, or after removing power (for approximately 5 seconds) and then restoring power to the KN63.

PILOT ACTION

The DME Red-X condition will be cleared and normal DME operation restored under either of the following conditions:

1. Remove power (for approximately 5 seconds) and then restore power to the KN63 DME. This procedure may need to be repeated in the unlikely event that the initial cycling of power does not clear the Red-X. 
2. The tuned DME station becomes valid and gains reception. This can be accomplished if NAV1 or NAV2 was selected in the DME TUNING Window prior to the power-up DME failure indication, the Red-X condition can be cleared by tuning the appropriate NAV radio to a valid DME station within signal reception for the area. 

Once valid operation is restored via one of the above methods, the DME Red-X condition is cleared for the remainder of the power cycle regardless of whether active or inactive signals are tuned. 

RESOLUTION

GDU Software versions 9.02 and above, have corrected this issue.