MIA07LA123 · Larry J. Cook Lancair 320
Larry J. Cook Lancair 320 · Accident: airframe, component or system failure en route
From Pensacola International Airport (PNS) to PFN · Panama City, FL
Event
- NTSB case
- MIA07LA123
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- Unknown
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Larry J. Cook Lancair 320
- Aircraft type
- Larry J Cook LANCAIR 320
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N52LC
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Pensacola International Airport (PNS), Pensacola, FLTo PFN · Panama City, FL
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- En route · cruise
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Airframe, component or system failure
- Also codedOther events the NTSB coded in the sequence, such as a wire strike after a loss of power. Flight Findings uses them for its kinds of event. Glossary
- Stall
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Other maintenance personnel › Maintenance, overhaul, not detected
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
Ten flight hours prior to the accident, the airplane's propeller was overhauled During cruise flight, a section of a blade separated. The pilot shut down the engine and attempted a forced landing at a nearby airport. While maneuvering to avoid a house on final approach the airplane stalled and landed hard just short of the runway. Metallurgical examination of the fractured blade surface revealed approximately 60% of the fractured surface was consistent with fatigue, which propagation from an area of corrosion on the blade’s cambered surface. Additionally, the propeller blades had been modified by shortening the blades. Hardware not approved by the propeller manufacturer was used for engine installation, and due to vibration concerns, the blade design was not approved by the propeller manufacturer for use on the accident airplane’s model engine.
Probable cause
The separation of a portion of a propeller blade due to fatigue cracking which initiated in an area of corrosion that was not detected during propeller overhaul 10 flight hours before the accident.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record MIA07LA123
- Event ID
- 20070727X01036
- Case number
- MIA07LA123
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status, coordinates. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: 4c391280665b0740a7ead12494e89d6c070d5ddf6adab32ce0bef65f9d486e78; retrieved 2026-09-22T03:38:13.297Z.