Piper PA-28-236 and Cessna 152 mid-air collision near Mercedes, Ar, November 21, 2011
On November 21, 2011 at about 1:20 pm local time, 2 aircraft, Piper PA-28-236 (PG449) and Cessna 152 (LVOOF), were involved in a mid-air collision near Mercedes (Mercedes Airfield). 2 people were killed; 2 others were unhurt.
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this accident. 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
- November 21, 2011 · about 1:20 pm local time
- Place
- Mercedes, Argentina · Mercedes Airfield · map
- Type
- Accident · mid-air collision
- Injuries
- 2 people were killed; 2 others were unhurt.
- Weather
- not recorded
- Aircraft 1
- Piper PA-28-236 · all PA-28-236s on the register
- Registration
- PG449 · no longer on the register
- Damage
- Minor damage
- Flight
- Public-use flight · non-U.S. private rules
- Aircraft 2
- Cessna 152 · all 152s on the register
- Registration
- LVOOF · no longer on the register · serial 152-84645
- Damage
- Substantial damage
- Flight
- Instructional flight · non-U.S. private rules
The NTSB's narrative for the Piper PA-28-236 preliminary · quoted from the NTSB record
On November 21, 2011, about 1320 coordinated universal time, a Piper PA-28-236, Argentine Air Force designation PF-449, and a Cessna 152, Argentine registration LV-OOF, collided while on approach to Mercedes Airfield (MRD), Mercedes, Buenos Aires Province, Argentina. The flight instructor and the pilot receiving instruction aboard the Cessna were fatally injured, while the 2 military pilots aboard the Piper were not injured. Both flights were conducted under Argentine flight regulations. The investigation is under the direction of the Argentine Republic. For further information contact: Junta de Investigaciones de Accidentes de Aviación Civil 1370 Belgrano Avenue 11th Floor Buenos Aires, República Argentina C1093AAO Fax - 54-11-4381-6333 Email - jiaaci@speedy.com.ar This report is for informational purposes, and only contains information that was released by the Argentine Republic.
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 NTSB's narrative for the Cessna 152 preliminary · quoted from the NTSB record
On November 21, 2011, about 1320 coordinated universal time, a Piper PA-28-236, Argentine Air Force designation PF-449, and a Cessna 152, Argentine registration LV-OOF, collided while on approach to Mercedes Airfield (MRD), Mercedes, Buenos Aires Province, Argentina. The flight instructor and the pilot receiving instruction aboard the Cessna were fatally injured, while the 2 military pilots aboard the Piper were not injured. Both flights were conducted under Argentine flight regulations. The investigation is under the direction of the Argentine Republic. For further information contact: Junta de Investigaciones de Accidentes de Aviación Civil 1370 Belgrano Avenue 11th Floor Buenos Aires, República Argentina C1093AAO Fax - 54-11-4381-6333 Email - jiaaci@speedy.com.ar This report is for informational purposes, and only contains information that was released by the Argentine Republic.
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 for the Piper PA-28-236 from the NTSB's investigation tables, in plain English
What happened, in order
- Midair collision during approach defining event
The aircraft
- Landing gear: fixed
The flight
- Destination: MRD Mercedes
- Flight plan: not recorded
Weather at the time
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 2 |
The factual record for the Cessna 152 from the NTSB's investigation tables, in plain English
What happened, in order
- Midair collision during approach defining event
The aircraft
- Landing gear: fixed
The flight
- Flight plan: not recorded
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 2 |
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.