# NTSB Accident MIA99LA186
> **Robert R. Callahan EXEC 90** · 1999-06-21 · LUTZ, FL, USA · SERS
## Event
- **NTSB number:** MIA99LA186
- **Event ID:** 20001212X19073
- **Type:** Accident
- **Date:** 1999-06-21
- **Location:** LUTZ, FL, USA
- **Coordinates:** 28.13031, -82.460105
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 2
## Aircraft
- **Make:** Robert R. Callahan
- **Model:** EXEC 90
- **Registration:** N4359N
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The excessive cyclic input by the non-qualified passenger during the autorotative landing following a reported loss of engine power.  A factor in the accident was the inadequate preflight of the helicopter by the unqualified pilot for his failure to detect corrosion at each ignition pack during the helicopter preflight, resulting in the loss of engine power.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=MIA99LA186) · AI Analytics · CC0 1.0*