665 Squadron
| Dates | Location | Higher Formation/Remarks |
| . | . | . |
| . | 665 Aviation Squadron | . |
| 1969.10.01 | England: Formed at McMunn Bks, Colchester, from 19 Bde flight, 1 RHA AOP Tp and 1 POW Air Pln | 3 Division Aviation: Scout AH 1 & Gazelle AH 1 |
| . | 7 Jun - 15 Sep 71: Northern Ireland: Aldergrove | Scout Helicopter Detachment |
| . | 16 Sep - 07 Oct 71: Northern Ireland: Aldergrove | Scout Helicopter Detachment |
| . | 15 Dec 72 - 14 Apr 73: Northern Ireland: Aldergrove | . |
| . | 1 Jan 73: Regiment renamed 3 Regiment AAC and squadron renamed 665 Squadron AAC | 3 Regiment AAC |
| . | 15 Aug - 13 Dec 74: Northern Ireland: Aldergrove | . |
| . | 2 Jul - 11 Aug 76: Northern Ireland: Sydenham | . |
| . | 14 Dec 76 - 12 Apr 77: NI: Aldergrove/Omagh/Sydenham/Ballykelly | . |
| . | 1 Apr 1978: Following the Wide Horizon Study, the Squadron was retitled 657 Squadron AAC | . |
| . | . | . |
| . | 665 Squadron AAC | . |
| 1986.03.12 | Northern Ireland: Reformed at Aldergrove | NI Regt AAC: Gazelle AH 1 & Lynx AH 1 |
| . | 1991: Became a Gazelle only squadron with 21 aircraft | Gazelle AH 1 |
| . | 1 Dec 93: Northern Ireland Regiment renamed 5 Regiment AAC | 5 Regiment AAC |
| 2000 | Aldergrove, Northern Ireland: Observation role | Gazelle AH 1 |
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