Boeing 737 incident near Lugano, Ch, April 4, 2012
On April 4, 2012 at about 9:09 am local time, a Boeing 737, registered EIDAH, was involved in an incident near Lugano. It was flown under scheduled airline rules (Part 121). 13 people had minor injuries; 127 others were unhurt.
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 9:09 am local time
- Place
- Lugano, Switzerland
- Type
- Incident
- Injuries
- 13 people had minor injuries; 127 others were unhurt.
- Weather
- not recorded
- Aircraft
- Boeing 737 8AS · all 737s on the register
- Registration
- EIDAH · no longer on the register
- Damage
- Not recorded
- Flight
- Flight · scheduled airline rules (Part 121)
The NTSB's narrative preliminary · quoted from the NTSB record
On April 4, 2012, at approximately 0909 UTC, a RyanAir B737-800, registration EI-DAH, operated by RyanAir, experienced a loss of cabin pressure near Lagano, Switzerland, during a scheduled passenger flight between Bergamo, Italy and Nottingham, United Kingdom. There was no damage to the aircraft and no serious injuries to the 6 crew and 121 passengers; 13 passengers reported minor injuries. The investigation of the incident was delegated to the German Federal Bureau of Aircraft Accidents Investigation (BFU) by the Swiss Accident Investigation Board (SAIB). 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: German Federal Bureau of Aircraft Accidents Investigation Hermann-Blenk-Str. 16 38108 Braunschweig Germany Website: http://www.bfu-web.de
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: Ryan International Airlines INC
Weather at the time
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 6 | |||
| Passengers | 13 | 121 |
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.