# NTSB Accident CHI90DCD02
> **BELL 47G-2** · 1990-08-26 · WALL LAKE, IA, USA · NONE
## Event
- **NTSB number:** CHI90DCD02
- **Event ID:** 20001212X23909
- **Type:** Accident
- **Date:** 1990-08-26
- **Location:** WALL LAKE, IA, USA
- **Coordinates:** 42.260021, -95.090148
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** BELL
- **Model:** 47G-2
- **Registration:** N90529
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

THE FAILURE OF THE PILOT TO MAINTAIN ROTOR RPM DURING TAKEOFF. THE HIGH DENSITY ALTITUDE AND UPHILL TERRAIN WERE FACTORS.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI90DCD02) · AI Analytics · CC0 1.0*