# NTSB Accident ERA16LA216
> **ROBINSON HELICOPTER R44** · 2016-06-17 · Chatham, MA, USA · SERS
## Event
- **NTSB number:** ERA16LA216
- **Event ID:** 20160618X24627
- **Type:** Accident
- **Date:** 2016-06-17
- **Location:** Chatham, MA, USA
- **Coordinates:** 41.71389, -69.98278
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 2
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** ROBINSON HELICOPTER
- **Model:** R44
- **Registration:** N141TM
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The inadequate maintenance of the lower forward clutch actuator bearing for a prolonged period of time, which resulted in a bearing failure. Contributing to the accident was an erroneous maintenance entry, which resulted in the helicopter being operated beyond its mandatory airframe overhaul time.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ERA16LA216) · AI Analytics · CC0 1.0*