# NTSB Accident ERA20LA054
> **Robinson R44** · 2019-12-14 · San Antonio, TX, USA · MINR
## Event
- **NTSB number:** ERA20LA054
- **Event ID:** 20191216X01351
- **Type:** Accident
- **Date:** 2019-12-14
- **Location:** San Antonio, TX, USA
- **Coordinates:** 29.377777, -98.476387
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 3
- **Uninjured:** 0
- **Total aboard:** 3
## Aircraft
- **Make:** Robinson
- **Model:** R44
- **Registration:** N440AH
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

Maintenance personnel’s failure to complete all necessary steps of a service bulletin and subsequent failure to identify the loose lower actuator bearing support bracket during inspections, which resulted in the misalignment of the clutch actuator, resulted in a loss of belt tension on the main rotor drive system, and the subsequent forced landing.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ERA20LA054) · AI Analytics · CC0 1.0*