# NTSB Accident CEN22LA146
> **Hughes (MD Helicopters) 369** · 2022-03-17 · Adair, IA, USA · MINR
## Event
- **NTSB number:** CEN22LA146
- **Event ID:** 20220318104795
- **Type:** Accident
- **Date:** 2022-03-17
- **Location:** Adair, IA, USA
- **Coordinates:** 41.532256, -94.66946
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** Hughes (MD Helicopters)
- **Model:** 369
- **Registration:** N500MZ
- **FAR Part:** 133
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The mechanic’s failure to properly torque a fuel control unit B-nut, which resulted in a partial loss of engine power, an attempted autorotation, and an impact with terrain.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CEN22LA146) · AI Analytics · CC0 1.0*