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ASN Wikibase Occurrence # 232916
Last updated: 7 September 2020
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Date:12-FEB-2020
Time:08:57 UTC
Type:Silhouette image of generic BCS3 model; specific model in this crash may look slightly different
Airbus A220-300
Owner/operator:Air Baltic
Registration: YL-AAU
C/n / msn: 55064
Fatalities:Fatalities: 0 / Occupants:
Other fatalities:0
Aircraft damage: Unknown
Category:Serious incident
Location:south of Bordeaux -   France
Phase: En route
Nature:Passenger - Scheduled
Departure airport:Riga International Airport (RIX/EVRA)
Destination airport:Málaga Airport (AGP/LEMG)
Investigating agency: NTSB
Narrative:
Air Baltic flight BT677, an Airbus A220-300, suffered a failure of the no.1 PW1521G engine en route between Riga, Latvia, and Málaga, Spain.
The aircraft had just completed an en-route climb from FL370 to FL390 when the engine failed. The flight crew turned back towards Bordeaux and declared an emergency. A safe landing was carried out at Bordeaux–Mérignac Airport (BOD/LFBD) 09:28 UTC.

BEA France reported that it was delegating the investigation of this serious incident to the NTSB given the similarities with other occurrences.
These three occurrences involved inflight shutdowns due to failure of the low-pressure compressor (LPC) stage 1 rotor, which resulted in the rotor disk releasing from the LPC case and damaging the engine.
As an interim measure Transport Canada issued an Airworthiness Directive on October 26, 2019, introducing a new Aircraft Flight Manual (AFM) limitation and normal procedure to limit the engine N1 setting to 94% while above 29000 feet.

Sources:

https://twitter.com/BEA_Aero/status/1227572797867724802
https://www.flightradar24.com/data/aircraft/yl-aau#23d5e327

Previous, similar incidents:
25 July 2019 HB-JCM: https://aviation-safety.net/wikibase/227838
16 Sept. 2019 HB-JCA: https://aviation-safety.net/wikibase/229426
15 Oct. 2019 HB-JCC: https://aviation-safety.net/wikibase/229966


Images:

Photo of YL-AAU courtesy AirHistory.net


Helsinki - Vantaa (EFHK / HEL)
28 August 2020; (c) Pertti Sipilä



Revision history:

Date/timeContributorUpdates
12-Feb-2020 14:56 harro Added
12-Feb-2020 14:57 harro Updated [Narrative]
12-Feb-2020 16:12 RobertMB Updated [Narrative]
12-Feb-2020 17:42 harro Updated [Source, Narrative]
12-Feb-2020 17:47 harro Updated [Narrative]
12-Feb-2020 20:28 Iceman 29 Updated [Photo]
12-Feb-2020 20:28 Iceman 29 Updated [Photo]

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