Title: CPDLC - Additional data in the ERROR message

PDR Reference:				97100018
Originator Reference: 			ERRORMSG
SARPs Document Reference: 		CPDLC SARPs, 2.3.7.2.3.1
Status: 					ADOPTED
PDR Revision Date: 			20/10/97 (SUBMITTED -> ACCEPTED -> PROPOSED)
						29/10/97 (RESOLVED)
PDR Submission Date: 			06/10/97
Submitting State/Organization: 	EUROCONTROL/Level-7
Submitting Author Name: 		Maude, T
Submitting Author E-mail Address: 	maude@level-7.co.uk
Submitting Author Supplemental 
Contact Information:			Tim Maude	
						Level-7 Ltd
						Centennial Court
						Easthampstead Road
						Bracknell
						Berks RG12 1YQ
						UK		
						Tel: +44 1344 867 199
						Fax: +44 1344 868 442
SARPs Date: 				IV1.1, March 97
SARPs Language:	 			English

Summary of Defect:

Section 2.3.7.2.3.1 requires the message element ERROR to be sent on its own with no other message element. 

One of the requirements that is emerging from the PETAL II work in EUROCONTROL is the need to provide additional information through the use of one of the freetext elements. This requirement would be satisfied if this restriction could be removed. It would thus allow a CPDLC-user to send the message element ERROR together with a freetext message containing further explanatory information. Of course, the freetext would not be entered by the aircrew - it would be built into the equipment, and be sent automatically and immediately on detection of the error.  

This change is straightforward and only impacts 2.3.7.  The current requirement is over specified (there is no operational requirement for such limitation). 

Assigned SME:				Sub-Volume II SME

Proposed SARPs amendment:

Delete 2.3.7.2.3.1.

SME Recommendation to CCB: 		-

CCB Decision:				atnp_ccb_chair: ACCEPTED (20/10/97)
						CCB-3: RESOLVED