ASN Wikibase Occurrence # 265044
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| Date: | Monday 9 November 2020 |
| Time: | c. 07:25 UTC |
| Type: |  Embraer E190-E2 |
| Owner/operator: | Air Astana |
| Registration: | P4-KHB |
| MSN: | 19020013 |
| Fatalities: | Fatalities: 0 / Occupants: |
| Aircraft damage: | None |
| Location: | near Nur-Sultan -
 Kazakhstan
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Aktau Airport (SCO/UATE) |
| Nursultan Nazarbayev International Airport (NQZ/UACC) | |
| Confidence Rating: |  Information is only available from news, social media or unofficial sources |
Air Astana flight KC314, an Embraer E190-E2, received a ‘HYD 3 HI TEMP’ EICAS message during descent, indicating that the temperature of the hydraulic fluid in the number 3 hydraulic system had increased above safe levels. Seconds later, an EICAS message ‘HYD 3 LO PRESS’ appeared. Shortly thereafter, multiple further EICAS messages appeared in rapid succession: 'HYD3 HI TEMP', 'IDG 2 OFF BUS', 'HYD3 LO PRESS', 'HYD3 ELEC PUMP B FAIL', 'AC BUS 2 OFF', 'A-I ENG 1 FAIL', 'CTR EBAY FANS FAIL', 'AC ESS BUS OFF', 'BATT 2 DISCHARGING', 'DC BUS 2 OFF', 'FLY CTRL N-MODE FAIL'.
The crew declared a “PANPAN” call to air traffic control and requested to delay its emergency approach into Nur-Sultan until it had performed all relevant QRH procedures. A safe landing was then made at Nur-Sultan
The aircraft resumed service on 13 November 2020.
A subsequent investigation determined that EICAS messages ‘HYD 3 HI TEMP’ and ‘HYD 3 LO PRESS’ had been caused by a pressure drop in one of the plane’s hydraulic systems, which had been caused by a failure of the alternating current motor pump (ACMP3A). The faulty ACMP3A caused the generator control unit to isolate and lose energy. This isolation caused the cascading failures and corresponding EICAS alerts that the flight crew experienced during descent.
Sources:
https://fingfx.thomsonreuters.com/gfx/legaldocs/azgpoqadepd/070221%20%20NYS%20Sup%20Ct%20%20Air%20Astana%20v%20Embraer%20complaint_934415454.pdf
https://www.flightradar24.com/data/aircraft/p4-khb#25ff2aba
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Jul-2021 07:17 | harro | Added |
| 04-Jul-2021 07:19 | harro | Updated [Narrative] |
Corrections or additions? ... Edit this accident description
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