ERA09LA421 · Robinson Helicopter Company R44 II
CFMC Robinson Helicopter Company R44 II · Accident: loss of engine power (partial) while maneuvering
From Peter O Knight Airport (TPF) to Peter O Knight Airport (TPF)
Event
- NTSB case
- ERA09LA421
- 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
Robinson Helicopter Company R44 II
- Aircraft type
- Robinson R44
- Category
- Helicopter
- 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
- N645JC
- Operator
- CFMC
- Onboard fatalities
- Unknown
- Route
- From Peter O Knight Airport (TPF), Tampa, FLTo Peter O Knight Airport (TPF), Tampa, 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
- Maneuvering
- Defining eventThe 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
- Loss of engine power (partial)
- 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
- Not determined › Not determined
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
During a local sightseeing flight, while over water with adequate fuel on-board, the pilot reported that the helicopter felt sluggish. He applied forward cyclic to accelerate and maneuvered the helicopter toward the shore. He then heard the main rotor rpm warning and also reported seeing the fuel quantity light. He entered an autorotation to the water and all occupants exited the helicopter and swam to shore. The helicopter remained submerged for more than 3 days and inspection of the helicopter and engine following recovery revealed no evidence of preimpact failure of the engine or engine accessories, including the magnetos or fuel servo. No determination was made as to the reason for the reported loss of engine power.
Probable cause
A partial loss of engine power for undetermined reasons.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record ERA09LA421
- Event ID
- 20090724X30924
- Case number
- ERA09LA421
- Dataset
- full-current
- Source SHA-256
- 5cf380f0061817c0331a6b2d8cc7e0ee3a79bea469a1001dc5c10e56f35f5ab3
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: f26ac3faa7897d8d1a850d16b229fbc1e8229890e3d168c5cee5e14a637e5a60; retrieved 2026-09-15T12:00:56.833Z.