# Accident 19870407008699A: Amtrmo SONERAI2, Algoma, WI, April 7, 1987

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: April 7, 1987, 10:50 local time
- Place: Algoma, WI
- Damage: Destroyed
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: General operating rules (Part 91)
- Location: 44.5999° N, 87.4400° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=44.5999&lon=-87.4400&mi=10
- Aircraft: N131DE, a cancelled registration (https://openairdocs.org/deregistered/N131DE-1991-09-04) (OpenAirDocs)
- Registry model: Erickson Donald Lee SONERAI IIL (registry code 056595J, https://openairdocs.org/model/erickson-donald-lee-sonerai-iil) (OpenAirDocs)
- Reported make and model: AMTRMO SONERAI2
- Reported engine: AMTRVW VW2100VOLKS
- People aboard: 1
- Fatal injuries: 0
- Pilot flight hours: 1,384 total, 32 in this make and model, 10 in the last 90 days
- NTSB investigation: [NTSB CHI87DEP03](https://openairdocs.org/ntsb/CHI87DEP03) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19870407008699A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

LOST THE PROPELLER AND CRASH LANDED. FOUND FORWARD END OF CRANKSHAFT HAD BROKEN DUE TO TORSIONAL OVERLOAD.

## The NTSB's investigation of this event (1)

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.

- [NTSB CHI87DEP03](https://openairdocs.org/ntsb/CHI87DEP03), Apr 7, 1987: Erickson Sonerai 2L (N131DE), Algoma, WI, destroyed

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

---
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.