Milestones
| 22/04/1998 | First airframe (DU0001/ZJ166) placed on Mesa production line |
| 25/09/1998 | First flight of DU0001 as N9219G, and official acceptance date |
| 28/09/1998 | Official roll-out at Mesa of DU0001 and handing over to WHL |
| 08/06/1999 | First military flight of a WAH-64 |
| 29/08/1999 | The first fuselage kit for Westlands final assembly line (DU0007/ZJ173) delivered to Yeovil |
| May 2000 | First delivery to MoD |
| 18/07/2000 | First flight of first Westlands built aircraft (ZJ173) |
| 31/07/2000 | First delivery of a Westlands built aircraft (ZJ173) to MoD |
| December 2000 | Formal In-Service Date (ISD) achieved on time. This date marked the delivery of 9 aircraft to the AAC |
| 13/01/2003 | 3 months of cold weather testing begin in Sweden using ZJ188 |
| 27/03/2003 | Boeing delivered the 67th and final UK AH-64D Apache kit ahead of schedule at their Mesa, Arizona facility |
| 01/04/2003 | The AAC's Attack Helicopter Training Unit at Middle Wallop is given the "number plate" of 673 Sqn |
| 08/06/2003 | First delivery to 9 Rgt at Dishforth |
| 01/09/2003 | Conversion-to-type training commences at Middle Wallop by 656 Sqn |
| 15/12/2003 | Military Aircraft Release 6a clearance is achieved. This accepted the embodiment of several elements of Helicopter Integrated Defensive Aids Suite (HIDAS) and an additional software release into the aircraft |
| 20/02/2004 | Conversion-to-type training completed by 656 Sqn |
| 30/03/2004 | Ship Operating Limit Trials on HMS Ocean were completed successfully |
| 21/07/2004 | The 67th and final Apache AH1 (ZJ233) was officially handed over to the MoD at Farnborough Airshow |
| 14/10/2004 | Initial Operating Capability (IOC) is declared by MoD |
| 19/01/2005 | The first delivery of aircraft to the Apache's main operating base of Wattisham took place when ZJ194 was delivered in from Shawbury as "AA292". This aircraft will be allocated to 3 Rgt, 662 Sqn. |
| 12/04/2005 | 3 Regiment at Wattisham flew their first mission today using ZJ190 as "Army Air 307" |
| 25/05/2005 | With exercise "Eagle's Strike" well under way, the Apache's official entry into the Army's inventory is announced |
| May 2006 | 656 Sqn (part of 9 Rgt at Dishforth) deploy to Afghanistan under Operation Herrick. This is the AAC Apaches first operational deployment. |
| June 2007 | 4 Rgt at Wattisham start flying regular training missions, whilst the first aircraft from 9 Rgt at Dishforth move to Wattisham. |