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| Date: | Friday 27 February 1987 |
| Time: | day |
| Type: |  Boeing Chinook HC1 (CH-47C) |
| Owner/operator: | 78 Sqn RAF |
| Registration: | ZA721 |
| MSN: | B.852/MA033 |
| Fatalities: | Fatalities: 7 / Occupants: 7 |
| Other fatalities: | 0 |
| Aircraft damage: | Destroyed |
| Location: | 6 km SE of RAF Mount Pleasant -
 Falkland Islands
|
| Phase: | En route |
| Nature: | Military |
| Departure airport: | RAF Mount Pleasant |
| RAF Mount Pleasant |
Crashed on rotor track and balance flight.
Potentially dur to failure of upper swivelling upper boost actuator due to a production defect and of the Longitudinal Cyclic Trim Actuator (LTCA) clutch
Sources:
http://www.ukserials.com/losses-1987.htm
http://www.ukserials.com/pdflosses/maas_19870227_za721.pdf
https://forum.keypublishing.com/showthread.php?t=98531
https://webarchive.nationalarchives.gov.uk/ukgwa/20121026065214/http://www.mod.uk/NR/rdonlyres/BED68A4D-44B2-4754-AA76-93C08C86892C/0/maas87_05_chinook_hc1_ZA721_27feb87.pdf
Images:
Falkland, MPA base
Media:
#OTD in 1987: a RAF Chinook [ZA721] crashes near Mount Pleasant base (Falkland Islands), all 7 aboard die. Helicopter was on a test flight after servicing, went down shortly after takeoff. Enquiry could not point definitive cause but pointed possibility of a control problem. pic.twitter.com/34OlK2ncE1
— Air Safety #OTD by Francisco Cunha (@OnDisasters) February 26, 2023
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-Apr-2010 05:14 | TB | Updated [Aircraft type, Registration, Cn, Operator, Total fatalities, Total occupants, Other fatalities, Location, Country, Phase, Nature, Departure airport, Source, Narrative, ] |
| 06-Jun-2012 05:46 | TB | Updated [Time, Registration, Operator, Destination airport, Source, ] |
| 08-Mar-2018 09:43 | Anon. | Updated [Narrative, ] |
| 29-Apr-2023 05:22 | Anon. | Updated |
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