ASN Wikibase Occurrence # 348693
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| Date: | Friday 8 December 2023 |
| Time: | 06:53 LT |
| Type: |  Boeing 737-8ZS (WL) |
| Owner/operator: | S7 Airlines |
| Registration: | RA-73665 |
| MSN: | 37084/3605 |
| Year of manufacture: | 2011 |
| Fatalities: | Fatalities: 0 / Occupants: 176 |
| Aircraft damage: | Unknown |
| Location: | Novosibirsk-Tolmachevo Airport (OVB/UNNT) -
 Russia
|
| Phase: | Take off |
| Nature: | Passenger - Scheduled |
| Departure airport: | Novosibirsk-Tolmachevo Airport (OVB/UNNT) |
| Moskva-Domodedovo Airport (DME/UUDD) | |
| Confidence Rating: |  Information is only available from news, social media or unofficial sources |
S7 Airlines flight S7 2502, a Boeing 737-800, returned to Novosibirsk-Tolmachevo Airport (OVB) due to surges in both engines.
While taking off, passengers heard loud bangs and saw flames coming from the engines. The pilots reported to controllers that two engines were surging and decided to return to the departure airfield.
The commission of the West Siberian MTU of the Federal Air Transport Agency which investigated this incident, came to the conclusion that the surging of both engines was due to unstable operation of the high-pressure compressors (HPC) of the engines due to the presence of contamination on the HPC blades as a result of intensive treatment of the aircraft with anti-icing fluid and the ingress of large amounts of salts from the runway, treated with special reagents.
These factors, as noted in the commission’s report, under certain external conditions lead to a deterioration in the efficiency of the HPC and the engine, due to the flow stall on the compressor blades.
Sources:
https://t.me/aviatorshina/4040
https://t.me/aviaincident/28000
https://www.flightaware.com/live/flight/RA73665/history/20231207/2330Z/UNNT/UNNT
https://www.airfleets.net/ficheapp/plane-b737ng-37084.htm
History of this aircraft
Other occurrences involving this aircraft
| 5 August 2019 | VQ-BKV | S7 Airlines, opb Globus | 0 | Moskva-Domodedovo Airport (DME/UUDD) | |
min |
| 20 October 2023 | RA-73665 | S7 Airlines | 0 | ENE of Novosibirsk | |
non |
| 27 January 2024 | RA-73665 | S7 Airlines | 0 | Ulan-Ude Airport (UUD/UIUU) | |
non |
Location
Media:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 08-Dec-2023 08:57 | vasilf | Added |
| 08-Dec-2023 11:50 | harro | Updated [Aircraft type, Other fatalities, Narrative] |
| 10-Dec-2023 14:16 | vasilf | Updated [Embed code] |
| 30-Jan-2024 13:38 | harro | Updated [Other fatalities, Source, Narrative] |
Corrections or additions? ... Edit this accident description
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