# Incident 20230720013599I: Hall Lester R LEGACY, Rochester, MN, July 20, 2023

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: July 20, 2023, 14:42 local time
- Place: Rochester, MN
- Airport: Rochester International
- Damage: Minor damage
- Phase of flight: Cruise/Level Flight
- Operating rules: General operating rules (Part 91)
- Location: 44.0573° N, 92.5062° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=44.0573&lon=-92.5062&mi=10
- Aircraft: N707MM, registered now (https://openairdocs.org/aircraft/N707MM) (OpenAirDocs)
- Registry model: Hall Lester R LEGACY (registry code 05615Z5, https://openairdocs.org/model/hall-lester-r-legacy) (OpenAirDocs)
- Registry engine: Continental IO-550 series (registry code 17042, https://openairdocs.org/engine/continental-io-550-series) (OpenAirDocs)
- Reported make and model: HALL LESTER R LEGACY
- Reported engine: CONT MOTOR IO-550 SERIES
- People aboard: 2
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Commercial pilot
- Pilot flight hours: 11,075 total
- NTSB investigation: [NTSB ENG23LA034](https://openairdocs.org/ntsb/ENG23LA034) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20230720013599I

## Narrative

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

ENROUTE TO AIRSHOW THE PIC DECLARED AN EMERGENCY DUE TO A CATASTROPHIC ENGINE FAILURE. THE AIRCRAFT DESCENDED FROM 23,000 FEET AND LANDED WITHOUT FURTHER INCIDENT. NO INJURIES AND MINOR DAMAGE. POST LANDING INSPECTION FOUND AN UNCONTAINED ENGINE FAILURE WITH DEBRIS FROM THE FAILURE CAUSING MINOR DAMAGE TO THE LEADING EDGES OF THE WINGS AND HORIZONTAL STABILIZER. ENGINE TO BE REMOVED FROM THE AIRCRAFT AND SENT TO PRATT AND WHITNEY FOR INSPECTION. ENGINE WAS RECENTLY INSTALLED ON AIRCRAFT. PIC STATED ENGINE TIME IN SERVICE WAS NEAR MANUFACTURERS RECOMMENDED OVERHAUL AND OPERATIONAL HISTORY WAS UNKNOWN.

## 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 ENG23LA034](https://openairdocs.org/ntsb/ENG23LA034), Jul 20, 2023: Hall Lester R Legacy (N707MM), Rochester, MN, incident, minor damage. Probable cause: Mechanically distressed reduction gears causing an engine overspeed and turbine blade tensile overload and subsequent uncontainment. Contributing to the uncontainment was the operator’s use of the…

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.

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