# NTSB Accident NYC90MA009
> **AGUSTA A109A MKII** · 1989-10-10 · LACEY TOWNSHIP, NJ, USA · FATL
## Event
- **NTSB number:** NYC90MA009
- **Event ID:** 20001213X29709
- **Type:** Accident
- **Date:** 1989-10-10
- **Location:** LACEY TOWNSHIP, NJ, USA
## Injuries
- **Highest injury:** FATL
- **Fatal:** 5
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 5
## Aircraft
- **Make:** AGUSTA
- **Model:** A109A MKII
- **Registration:** N21FL
- **FAR Part:** 135
- **Engines:** 2
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

IN-FLIGHT SEPARATION OF A MAIN ROTOR BLADE DUE TO FATIGUE FAILURE OF THE MAIN ROTOR BLADE SPAR, WHICH ORIGINATED AT A MANUFACTURING INDUCED SCRATCH (TOOL MARK) THAT WAS THE RESULT OF INADEQUATE QUALITY CONTROL.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=NYC90MA009) · AI Analytics · CC0 1.0*