1. harris.com 02/01/2014 – 02/28/2015 Alex Murray | Systems Engineer DCIT 39 Plenary Health Monitoring Stats

2. | 2 DCIT 39 Health Monitoring Report | | 2 Overview DCL Trials data for period 02/01/2014 – 02/28/2015 Slight decrease (4%) in eligible flights that received clearance but an increase in the number of flights that received Initial Modified and Revised CPDLC DCL (Departure Clearance) Failed received CPDLC DCL and high pilot response times were analyzed during this period. There are still occurrences where pilots are not logging in, requesting clearance, or receiving clearances. Issues reports are now being sent to each participating carrier each reporting period

3. | 3 DCIT 39 Health Monitoring Report | | 3 9.5% of total operations used CPDLC to obtain departure clearance 2,401 Eligible Flights –89.4% Initial CPDLC DCL – 2.8% Initial Modified CPDLC DCL – 0.3% Revised CPDLC DCL 7.8% Flights Failed to Receive Clearance via CPDLC –3.9% Failed to Logon –2.2% Failed to Request DCL –1.7% Failed to Receive DCL Key Points and Metrics

4. | 4 DCIT 39 Health Monitoring Report | | 4 Flights that requested clearance but didn’t receive clearance were analyzed. Reasons for pilots failing to receive clearance were found to be caused by –Downlink latency time greater than 40 seconds. –Free text entered in request clearance and pilot never request clearance again –Ground system disconnect session before sending clearance –Clearance was never sent Failed Received Clearance Analysis