Boeing 737 incident near Umea, SE, April 4, 2012
On April 4, 2012 at about 9:50 am local time, a Boeing 737, registered LNRPS, was involved in an incident near Umea. It was flown under foreign airline rules (Part 129). No one was hurt; 122 people were on board or involved.
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this incident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- April 4, 2012 · about 9:50 am local time
- Place
- Umea, Sweden
- Type
- Incident
- Injuries
- No one was hurt; 122 people were on board or involved.
- Weather
- not recorded
- Aircraft
- Boeing 737 683 · all 737s on the register
- Registration
- LNRPS · no longer on the register
- Damage
- Not recorded
- Flight
- Flight · foreign airline rules (Part 129)
The NTSB's narrative preliminary · quoted from the NTSB record
On April 4, 2012, at approximately 0950 UTC, a B737-600, registration LN-RPS, operated by Scandinavian Airlines, experienced a failure of the left bleed system while climbing through flight level (FL) 370. The climb continued with only the right system operational to FL410. While at FL410, the right bleed system also failed. An emergency descent to 10,000 feet was initiated, and oxygen masks were deployed. The flight diverted to Umeå, Sweden(ESNU). There was no damage to the aircraft and no injuries to the 6 crew and 116 passengers. The investigation is being conducted by the Swedish Accident Investigation Authority. The NTSB has appointed an Accredited Representative to assist the investigation under the provisions of ICAO Annex 13 as the State of Manufacture and Design of the airplane. All inquiries should be directed to the Swedish Accident Investigation Authority at: Swedish Accident Investigation Board P.O. Box 12538 SE-102 29 Stockholm Website: http://www.havkom.se
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
The aircraft
- Landing gear: fixed
- Operator: Scandinavian Airlines System
Weather at the time
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Cabi | 4 | |||
| Flight crew | 2 | |||
| Passengers | 116 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.