ERA12TA251 · Bell 407
Palm Beach County Sheriffs Office Bell 407 · Accident: loss of lift
From PBI · West Palm Beach, FL to PBI · West Palm Beach, FL
Event
- NTSB case
- ERA12TA251
- 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
- Government
- 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
Bell 407
- Aircraft type
- Bell 407
- 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
- N31PB
- Onboard fatalities
- Unknown
- Route
- From PBI · West Palm Beach, FLTo PBI · West Palm Beach, 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
- Public Aircraft
- 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
- Other
- 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 lift
- 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
- Personnel issues › Action/decision
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
While in cruise flight during the law enforcement aerial surveillance and evaluation flight, the instructor induced a simulated engine failure. The pilot being evaluated rolled the throttle from the idle position back to the flight position instead of lowering the collective to maintain rotor rpm. The instructor then took control of the helicopter, but he did not lower the collective either, and the main rotor rpm subsequently decayed to well below the lower limit of the normal operating range. The low-rotor condition resulted in a loss of helicopter control and glide capability and a subsequent hard landing in trees. Examination of the flight department's training program revealed that the conditions and standards for the performance of a simulated engine failure were not outlined as a separate task within the manual and that the manual did not provide information regarding entry altitudes, callouts, recovery altitudes and procedures, or maneuver termination protocols. The instructor reported no mechanical deficiencies with the helicopter that would have precluded normal operation.
Probable cause
The pilot’s improper response to a simulated engine failure and the instructor’s delayed and improper remedial action.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record ERA12TA251
- Event ID
- 20120324X31438
- Case number
- ERA12TA251
- 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: bbd85e2facace02f5dc33d668d919f3b0e96e9a7ca75d04a5aa6a0bf9365d993; retrieved 2026-09-15T17:33:14.241Z.