# NTSB CEN10WA148: Alon Aircoupe A2-A, Ciborro, Montemor-o-Novo, Portugal, March 6, 2010

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Foreign investigation
- Date: March 6, 2010, 16:30 local (16:30 UTC)
- Place: Ciborro, Montemor-o-Novo, Portugal
- Coordinates: 38.785556, -8.204166 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.7856&lon=-8.2042&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Defining event: [Maneuvering: Loss of control in flight](https://openairdocs.org/ntsb-events/240)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Led by another country's authority
- NTSB office: Central Region
- Lead agency: Other
- Parties: Portuguese IIC
- NTSB case key (mKey): 75471
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN10WA148
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/75471/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=75471
- Page: https://openairdocs.org/ntsb/CEN10WA148

## Probable cause

This accident is under the jurisdiction and control of the Portuguese government.

## Findings

NTSB's coded findings; those marked are part of the probable cause.

- [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Other authority investigated (probable cause); cases with it: [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md)

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Maneuvering: Loss of control in flight](https://openairdocs.org/ntsb-events/240) (defining event); cases with it: [All aircraft, 5,002 cases](https://openairdocs.org/ntsb-events/240/sequence.md)

## Analysis

On March 6, 2010, at 1630 coordinated universal time, an Alon Aircoupe A2-A, Portuguese registered CS-AIG, was destroyed when it impacted terrain under unknown circumstances near Ciborro, Montemor-o-Novo, Portugal. Visual meteorological conditions prevailed at the time of the accident. The pilot and one passenger were fatally injured. The local flight originated from Ciborro, Montemor-o-Novo, Portugal. The Portuguese investigators reported that the airplane departed for a one hour local flight and when it did not return, a search was initiated. The wreckage was discovered north/northwest of the airport in a marshy field. The accident investigation is under the jurisdiction and control of the Portuguese government. This report is for informational purposes only and contains only information released by or obtained from the Portuguese government. Further information pertaining to this accident may be obtained from: Ministério das Obras Públicas, Transportes e Comunicações GPIAA - Gabinete de Prevenção e Investigação de Acidentes com Aeronaves Praca Duque de Saldanha 31-4º 1050-094 LISOBOA, Portugal

## Factual narrative

On March 6, 2010, at 1630 coordinated universal time, an Alon Aircoupe A2-A, Portuguese registered CS-AIG, was destroyed when it impacted terrain under unknown circumstances near Ciborro, Montemor-o-Novo, Portugal. Visual meteorological conditions prevailed at the time of the accident. The pilot and one passenger were fatally injured. The local flight originated from Ciborro, Montemor-o-Novo, Portugal. The Portuguese investigators reported that the airplane departed for a one hour local flight and when it did not return, a search was initiated. The wreckage was discovered north/northwest of the airport in a marshy field. The accident investigation is under the jurisdiction and control of the Portuguese government. This report is for informational purposes only and contains only information released by or obtained from the Portuguese government. Further information pertaining to this accident may be obtained from: Ministério das Obras Públicas, Transportes e Comunicações GPIAA - Gabinete de Prevenção e Investigação de Acidentes com Aeronaves Praca Duque de Saldanha 31-4º 1050-094 LISOBOA, Portugal

## Aircraft

- Registration: CS-AIG (not matched to a registry record)
- Reported make and model: Alon Aircoupe A2-A
- Category: Airplane
- Serial number: B-280
- Damage: Destroyed
- Flight: Personal, Non-U.S., non-commercial
- Airworthiness certificate: Unknown
- Departed: Ciborro, Montemor-o-Novo
- Destination: Ciborro, Montemor-o-Novo
- Flight plan: Unknown
- Airport: runway 31

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; injuries: fatal; medical: unknown

## Weather

- Conditions: Visual (VMC), Day
- Wind: 210° at 7 knots
- Visibility: 6 statute miles
- Lowest ceiling: none
- Temperature: 63 °F, dew point 55 °F
- Altimeter: 29.64 inHg
- Observed at: LPPT, 50 nm away

## Docket (1 files)

The files NTSB released with the investigation on March 15, 2010, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=75471. 10 KB in all.

- Docket Insert - CEN10WA148 (item 1, .PDF, 10 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40327016&FileExtension=.PDF&FileName=Docket%20Insert%20-%20CEN10WA148-Master.PDF

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.