CHI91LA179 · Lake LA-4-200
Brook Aero Lake LA-4-200 · Accident while taxiing
Event
- NTSB case
- CHI91LA179
- 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
- 0
- 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
Lake LA-4-200
- Aircraft type
- Lake LA-4
- 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
- N2596P
- Operator
- Brook Aero
- Onboard fatalities
- Unknown
- Route
- From not recordedTo not recorded
- 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
- Taxi · to runway
- 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
- Miscellaneous/other
- 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/mush
- 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
- Dual student › Aircraft control, not maintained
- Pilot in command(cfi) › Remedial action, delayed
- Pilot in command(cfi) › Stall/mush, encountered
Approximate · Estimated position: the centre of Battle Creek, MI, the place the record names. Not the accident site.
NTSB narrative
THE CFI SAID THAT WHILE TAXIING ON STEP THE ACFT ENCOUNTERED A POWER BOATS WAKE AND BECAME AIRBORNE. THE STUDENT PILOT REDUCED THE POWER, AND THE ACFT PITCHED DOWN. THE CFI TOOK OER THE CONTROLS, BUT WAS UNABLE TO ARREST THE DESCENT AND THE ACFT STRUCK THE WATER NOSE DOWN, AT ABOUT A 30 DEGREE ANGLE. THE ACFT NOSE FILLED WITH WATER AND SANK.
Probable cause
AIRCRAFT CONTROL BY THE DUAL STUDENT WAS NOT MAINTAINED, REMEDIAL ACTION BY THE CFI WAS DELAYED, WHICH RESULTED IN A STALL/MUSH. A FACTOR RELATED TO THE ACCIDENT WAS ROUGH WATER CAUSED BY A POWER BOAT WAKE.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CHI91LA179
- Event ID
- 20001212X17212
- Case number
- CHI91LA179
- 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. 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: 67c27e4a3f9441a8133f76b7cc08597ecd893b63b8eb8012f206bf896a469419; retrieved 2026-09-23T04:07:56.430Z.