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Appendix B: Eligible Aircraft Commands

Revision: 21 Sep 2024

Command	Additional Parameters	Command Examples
AM - Altitude Amendment	CPDLC fields: /U - Uplink /PD; /IMM; /EXP - pilot’s discretion, immediately, expedite /TFC; /RES; /WX - due to traffic, due to airspace restriction, due to weather NOTE: The altitude field (e.g., ALT 230) can be typed between the CPDLC fields delineated with spaces. Spaces are optional between CPDLC fields.	AM 234 ALT 120 /U AM 234/OK ALT 120 /U AM UAL232 /U ALT 230 /PD/WX AM UAL232 /PD/WX ALT 230 /U AM UAL232 /PD /U /WX ALT 230
CO - Suppress Conflic Alert Pair	none	CO UAL110/UAL312 (/ delimiter)
DM - Departure Message	Altitude (values = OTP/(d)dd,VFR/(d)dd,ABV/(d)d d, (d)dd/fix/(d)dd), Departure point, for example, /IND, /OK (logic check override) where /OK must be suffixed at the end of flight ID field if used	DM AAL320 DM 035 DM AAL320 STL DM AAL320* DM 035* DM AAL230 SFO* DM AAL320 SFO* 1845 230 DM AAL320 SFO/OK 1845 230 DM 030 150 DM 030 1645 DM 1146 1500 160 DM 351/353 DM 342/333 DM 312/234 DM UAL123*/UAL887
ED - CPDLC Terminate Session		ED AAL345 ED 456 ED 4456
MW - Manual Swap	/OK (logic check override), when swap requests are across more than one list	MW UAL123/AAL321 MW 234/345 MW 1450/1543 MW UAL123/AAL321 /OK
QA - Select Auto Handoff	none	QA UAL36 QA /UAL36 QA JFK ABC QA UAL22/UAL212 QA 213/654
QB - Discrete Code Request	/OK (logic check override)	QB 367 QB /367 QB /OK AAL12 QB 367/234 QB AAL123/UAL345
QF - Flight Plan	none	QF 123 QF R 123 QF UAL123 QF /123 QF /UAL123 QF 123/456 QF UAL123/AAL456 QF R 123/456
QF D - Flight Plan CPDLC Session Correlation	none	QF D 123 QF D UAL123
QH - Hold	/OK (logic check override), Hold Data (fix/time, for example, COL/2235) /U, Uplink Message	QH C /OK UAL212 QH ABC UAL112 QH ABC 123 QH ABC/1450 /123 QH 347 QH C UAL112/AAL234 QH C 123/256 QH ABC UAL123/AAL222 QH ABC 123/299 QH ABC/1450 123/1126 QH 347/123 QH /U SEEDS UAL102 QH /U SEEDS/2030 UAL102 QH /U SEEDS 180/LT/5MIN 870 QH /U SEEDS/2030 180/LT/5MIN 870
QH - Update EFC-Only	/U, Uplink Message	QH 2045 UAL102 QH /U 2045 UAL102
QN,QZ - Toggle On-Frequency (cannot be combined with a QZ Uplink Command)	none	QN // AAL1254 QN //AAL1254 QZ // AAL1254 QZ //AAL1254 The space after // is optional
QN,QZ - Initiate Handoff (cannot be combined with a QZ Uplink Command)	/OK (logic check override)	QZ 08 /OK 122 JFK 122 08 /122 QZ L31 /122 21 /OK 123 QZ JFK UAL123 08 UAL365 L31 /UAL365 QZ 08 /UAL365 QZ 08 122/187 QZ JFK UAL123/AAL655 08 122/187 L31 UAL123/UAL887 08 122/234
QN,QZ - Offset Data Block (cannot be combined with a QZ Uplink Command)	Direction/Length or /Length where direction = 1-9 and length = 0-3,5	QZ 8 122 8/3 122 8 /122 QZ /3 /122 2/1 123 QZ 3 UAL123 8 UAL365 1 /UAL365 QZ 8 /UAL365 QZ 8 122/187 QZ 8 UAL123/AAL655 8 122/187 1 UAL123/UAL887 8 122/234
QP - Pointout	none	QP 08 122 QP 08 /122 QP 08 UAL112 QP 31 /UAL123 QP 08 122/187 QP 08 UAL123/AAL655
QP - Request/Suppress Data Block	none	QP 122 QP /122 QP UAL112 QP /UAL123 QP 122/187 QP UAL123/AAL655
QP A - Acknowledge Point Out	none	QP A 121 QP A /122 QP A UAL321 QP A /UAL432 QP A 012/123 QP A UAL321/AAL456 QP A 124/UAL789
QP R - Suppress MRP View Entry	none	QP R UAL110 QP R 312 QP R UAL110/AAL123 QP R 312/122 QP R 213/UAL123
QP J - Halo	none	QP J 122 QP J /122 QP J UAL112 QP J /UAL123 QP J 122/187 QP J UAL123/AAL655
QQ - Amend interim Altitude	/TT or other adapted two characters	QQ 130 312 QQ /TT 130 312 QQ 170 /UAL456 QQ 190 2135 QQ R350 514 QQ 130 312/443 QQ 170 UAL456/AAl234 QQ 190 2135/145 QQ R350 514/777
QQ - Amend and Uplink Interim Altitude	CPDLC fields: /U - Uplink /PD; /IMM; /EXP - pilot’s discretion, immediately, expedite /TFC; /RES; /WX - due to traffic, due to airspace restriction, due to weather NOTE: The CPDLC fields can be entered in any order between the command field 01 (e.g., QQ) and the FLID. Non-CPDLC fields (e.g., altitude) can be typed between the CPDLC fields delineated with spaces. Spaces are optional between CPDLC fields.	QQ 210 /U 334 QQ /U 210 /IMM/WX 334 QQ /PD /U 240 UAL123 QQ 210 /U/EXP/TFC 334 QQ /IMM /U 240 /RES UAL123 QQ /U 270 /WX/PD 133
QQ - Delete Interim Altitude	/TT or other adapted two characters	QQ /514 QQ 312 QQ UAL888 QQ 312/676 QQ UAL123/UAL998
QQ P - Enter/Update Procedure Altitude	/TT or other adapted two characters	QQ P 130 312 QQ P 130 /TT 312 QQ P 170 /UAL456 QQ P 190 2135 QQ P 130 312/443 QQ P 170 UAL456/AAL234 QQ P 190 2135/145
QQ - Delete Procedure Altitude	/TT or other adapted two characters	QQ /514 QQ 312 QQ UAL888 QQ 312/676 QQ UAL123/UAL998
QQ L - Amend Local Interim Altitude	/OK (logic check override) — when flight is controlled in local facility, non-controlling sectors require an override	QQ L290
QQ L - Amend and Uplink Local Interim Altitude	CPDLC fields: /OK (logic check override) — when flight is controlled in local facility, non-controlling sectors require an override /U - Uplink /PD; /IMM; /EXP - pilot’s discretion, immediately, expedite /TFC; /RES; /WX - due to traffic, due to airspace restriction, due to weather NOTE: The CPDLC fields can be entered in any order between the command field 01 (e.g., QQ) and the FLID. Non-CPDLC fields (e.g., altitude) can be typed between the CPDLC fields delineated with spaces. Spaces are optional between CPDLC fields.	QQ L130 /U 312 QQ /U L130 UAL456 QQ L130 /PD /U 312 QQ /IMM /U L130 /RES 312 QQ /EXP /U /TFC L130 UAL123
QQ L - Delete Local Interim Altitude	/OK (logic check override) — when flight is controlled in local facility, non-controlling sectors require an override	QQ L 312 QQ L UAL123
QQ L - Uplink Delete Local Interim Altitude	/OK (logic check override) — when flight is controlled in local facility, non-controlling sectors require an override /U - Uplink	QQ L /U 312 QQ L /U UAL123
QQ W - Uplink Waiver Altitude	CPDLC fields: /OK (logic check override) — when flight is controlled in local facility, non-controlling sectors require an override /U - Uplink /PD; /IMM; /EXP - pilot’s discretion, immediately, expedite /TFC; /RES; /WX - due to traffic, due to airspace restriction, due to weather NOTE: The CPDLC fields can be entered in any order between the command field 01 (e.g., QQ) and the FLID. Non-CPDLC fields (e.g., altitude) can be typed between the CPDLC fields delineated with spaces. Spaces are optional between CPDLC fields.	QQ W /U AAL123 QQ /EXP /U 312 QQ /IMM W /U 312 QQ /PD /U W AAL123
QS - 4th Line Speed/Heading/Free Form Text	Heading/speed; deletion of 4th line data (/,/)	QS 330/81 UAL110 QS 330/81 312 QS 330 312 QS /330 312 QS / 312 QS / 312 QS 0ABCDEF 312 QS 330/81 UAL110/UAL234 QS 330/81 312/454 QS 330 312/453 QS /330 312/453 QS / 312/453 QS / 312/453 QS 0ABCDEF 312/453
QT * - Assume Unconditional Track Control	none	QT * 312
QU - Route Display	none	QU QU 312 QU 30 312 QU /312 QU /UAL123 QU AAL123 QU 312/767 QU 30 312/555 QU 30 AAL123/AAL167
QU - Route Amendment	CPDLC fields: /OK (logic check override) — when flight is controlled in local facility, non-controlling sectors require an override /U - Uplink /TFC; /RES; /WX - due to traffic, due to airspace restriction, due to weather /FRC - Full Route Clearance Indicator NOTE: The CPDLC fields can be entered in any order between the command field 01 (e.g., QU) and the FLID. Non-CPDLC fields (e.g., fix) can be typed between the CPDLC fields delineated with spaces. Spaces are optional between CPDLC fields.	QU TEAKK /U/TFC/FRC 334 QU /FRC TEAKK /U/WX 334 QU /FRC /U MEM120050 GNATT /WX 334 QU NEHOW /U/RES UAL123 QU /U /RES TEAKK UAL123 QU /OK GNATT /U/WX/FRC 334
QX - Drop Track		QX 312 QX AAL123
QX FP - Flight Cancellation Update		QX FP 312 QX FP AAL123
QX /R - Surrender Control		QX /R 312 QX /R AAL123
QZ - Assigned Alt	/OK (logic check override), Altitude (values = OTP/ddd,VFR/ddd,ABV/ddd, ddd/fix/ddd /U (uplink) the QZ uplink command may not be combined with the Initiate Handoff, Offset Direction, or the Toggle On-Frequency actions.	QZ 130 312 QZ /OK 130 312 QZ 170 /UAL456 QZ 190 2135 QZ 190/ABC/210 556 QZ 350B390 514 QZ OTP/350 455 QZ VFR/100 455 QZ ABV/390 455 QZ 130 312/454 QZ 190 2135/234 QZ 350B390 514/567 QZ OTP/350 455/UAL123 QZ VFR/100 455/450 QZ ABV/390 455/2312 QZ OTP/190 A1/UAL123 QZ 190/ABC/210 556/UAL11
QZ - Assigned Alt with Uplink	The QZ uplink command may not be combined with the Initiate Handoff, Offset Direction, or the Toggle On-Frequency actions. /OK (logic check override) — when flight is controlled in local facility, non-controlling sectors require an override. CPDLC fields: /OK (logic check override) — when flight is controlled in local facility, non-controlling sectors require an override /U - Uplink /PD; /IMM; /EXP - pilot’s discretion, immediately, expedite /TFC; /RES; /WX - due to traffic, due to airspace restriction, due to weather NOTE: The CPDLC fields can be entered in any order between the command field 01 (e.g., QZ) and the FLID. Non-CPDLC fields (e.g., altitude) can be typed between the CPDLC fields delineated with spaces. Spaces are optional between CPDLC fields.	QZ 310 /U 334 QZ /PD 310 /U 334 QZ /IMM /U /RES 220 UAL123 QZ /OK 310 /U 334 QZ /U /IMM 210 /WX 334 QZ /PD /U 240 UAL123 QZ /EXP/TFC 210 /U 334 QZ /IMM /U /RES 240 UAL123
RE - Release CPDLC Eligibility		RE AAL456 RE 345 RE 3445
SD - Initiate CPDLC Session		SD AAL123 SD 356 SD 4566
SG - Suppress	none	SG A NERD2/REF3 SG A 097/352 SG A 4324/2747 (change from existing syntax because the / delimiter replaced the space that was previously used as a delimiter)
SQ - Resequence	/OK (logic check override), when resequence requests are across more than one list	SQ UAL123/AAL321/DAL456 SQ 234/345 SQ 1450/1543 SQ UAL123/AAL321 /OK
SX - Steal Eligibility		SX AAL123 SX 456 SX 4456
UA - Uplink Altimeter		UA AAL456 UA 345 UA 3445 UA CRP AAL456 UA CRP 345 UA CRP 3445
UC - Uplink Crossing		UC BRRNS A240 AAL456 UC BRRNS A240 345 UC BRRNS A240 M.75 AAL456 UC CATTT A140 S250 AAL456
UF - Uplink Frequency		UF UAL123 UF 118.25 UAL123 UF 26 UAL123 UF ZFW 122.5 UAL123 UF ZFW42 UAL123 UF ZWY ED UAL123 UF ED ZWY UAL123 UF ZWY ED RT UAL123 UF ED RT ZWY UAL123 UF ZWY UAL123 UF ZWY 119.5 ED UAL123 UF ZWY 6608 AAL123 UF AIA UAL123 UF AIA 118.5 UAL123 UF AIA1w UAL123
UG - Uplink Assigned Altitude		UG /CAA AAL345 UG /CAA 234 UG /CAA 2334
UH - Release Held TOC		UH ZHU/42 124.2 AAL234 UH 98 124.2 AAL234 UH ZHU/42 124.2 AAL234 UH ZHU/42 124.2 AAL234 UH ZWY 6640 AAL234
UM - Advisory Messages	/S - Create, Amend, or Save Advisory Message /F - Freetext Message /U - Uplink Advisory Message /D - Delete Advisory Message	UM /S CHOP230� SEVERE CHOP REPORTED OVER MARCS AT FL230 UM /F ADVISE WHEN ABLE DIRECT MEM� AAL232 UM /U CHOP230� AAL232 UM /D CHOP230

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