| 29/03/1999 | Acceptance Date | |
| Apr 1999 | At Mesa as N3123T | |
| 28/05/1999 | Arrived at Yeovilton as airfreight aboard a Heavylift Belfast | |
| 29/05/1999 | Delivered to Yeovil | |
| 26/08/1999 | First flight | |
| 06/01/2000 | Delivered to DERA Boscombe Down | |
| 15/03/2000 | Noted at Yeovil as “Westland 09” | |
| 19/06/2000 | Official delivery date | |
| 22/06/2000 | Noted at Boscombe Down | |
| Late June 2000 | Returned to Yeovil | |
| July 2000 | Arrived at Middle Wallop for AHTU | |
| 15/05/2001 | Noted with AHTU Middle Wallop | |
| 03/08/2001 | Noted at Yeovil | |
| 22/08/2001 | Noted at Yeovil | |
| 26/06/2002 | Noted visiting Shawbury as "Army Air 070" | |
| 27/06/2002 | Noted operating from Thorney Island | |
| 12/03/2003 | Delivered by road into storage at Shawbury | |
| 20/07/2005 | Delivered to Yeovil as "Westland 01" | |
| 09/03/2006 | Delivered into Shawbury as "Westland 5" | |
| 19/07/2007 | Delivered to 4 Rgt at Wattisham as "Gangster" | |
| 27/02/2008 | Noted with 4 Rgt at Wattisham | |
| 16/05/2009 | Noted for a few days marked up with the name "Dickson Pioneer III 1873-1913" | |
| 11/07/2009 | Noted at Wattisham | |
| 12/10/2009 | Officially allocated with 673 Sqn at Middle Wallop | |
| 20/10/2010 | Noted with 673 Sqn at Middle Wallop | |
| Nov 2010 | To AH DSU at Wattisham | |
| Jan 2011 | Allocated with ADSU at Wattisham | |
| Mar 2011 | Transferred to 3 Rgt at Wattisham | |
| May 2011 | Operating from Wattisham with a "Mohawk" callsign | |
| Jun 2011 | Operating from Wattisham with a "Mohawk" and "Vulture" callsign | |
| Jul 2011 | Noted operating with 4 Rgt using a callsign of "AA465" | |