8/15/19 3/15/07 1/30/20 AIM  7110.65R CHG 2 AIM TBL 5 − 3 − 16 Free Text Uplink Message Elements (TXTU) CPDLC Message Sets Operational Definition in PANS − ATM (Doc 4444) FANS 1/A ATN B1 Response Message  Element  Identifier Message Element Intended Use Format for  Message Ele- ment Display UM169 ( free text ) UM203 ( free text ) R TXTU − 1 ( free text ) Note − M alert  attribute. UM169 ( free text ) CPDLC NOT IN USE UNTIL FURTHER NOTIFICATION N/A R See Note ( free text ) UM169 ( free text ) “[facility designation]” LOCAL ALTIMETER (for Altimeter Report- ing Station) N/A R See Note ( free text ) UM169 ( free text )  “[facility designation] LOCAL ALTIMETER MORE THAN ONE HOUR” OLD N/A R See Note ( free text ) UM169 ( free text )  DUE TO WEATHER N/A R See Note ( free text ) UM169 ( free text )  REST OF ROUTE UN- CHANGED N/A R See Note ( free text ) UM169 ( free text )  TRAFFIC FLOW MANAGEMENT REROUTE N/A R See Note ( free text ) NOTE − These are FAA scripted free text messages with no GOLD equivalent. En Route Procedures 5 − 3 − 10