# NTSB Incident NYC88IA186
> **MBB BK-117** · 1988-07-12 · MANHATTAN, NY, USA · NONE
## Event
- **NTSB number:** NYC88IA186
- **Event ID:** 20001213X26360
- **Type:** Incident
- **Date:** 1988-07-12
- **Location:** MANHATTAN, NY, USA
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** MBB
- **Model:** BK-117
- **Registration:** N135CP
- **FAR Part:** 091
- **Engines:** 2
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** Unk
## Probable cause

FAILURE OF THE MAIN ROTOR BLADE APPEARS TO BE THE RESULT OF A STATIC DOWNWARD BENDING OVERSTRESS, CAUSED BY ANOTHER HELICOPTER HOVERING OVER OR VERY CLOSE TO THE MAIN ROTOR BLADE AS IT WAS IN A STATIC/STOPPED POSITION.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=NYC88IA186) · AI Analytics · CC0 1.0*