# NTSB Incident ENG20IA005
> **Agusta A109** · 2019-11-16 · Penobscot, ME, USA · NONE
## Event
- **NTSB number:** ENG20IA005
- **Event ID:** 20191122X42900
- **Type:** Incident
- **Date:** 2019-11-16
- **Location:** Penobscot, ME, USA
- **Coordinates:** 44.52111, -68.641113
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 4
- **Total aboard:** 4
## Aircraft
- **Make:** Agusta
- **Model:** A109
- **Registration:** N901EM
- **FAR Part:** 135
- **Engines:** 2
- **Damage:** MINR
## Conditions
- **Light:** NITE
- **Weather:** VMC
## Probable cause

Fatigue fracture of the main rotor blade tip cap leading edge and subsequent partial separation of the tip cap, resulting in increased vibrations in the main rotor.

---
*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ENG20IA005) · AI Analytics · CC0 1.0*