# NTSB Incident ATL98IA039
> **Robinson R-44** · 1998-01-23 · MIAMI, FL, USA · NONE
## Event
- **NTSB number:** ATL98IA039
- **Event ID:** 20001211X09393
- **Type:** Incident
- **Date:** 1998-01-23
- **Location:** MIAMI, FL, USA
- **Coordinates:** 25.649188, -80.410339
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** Robinson
- **Model:** R-44
- **Registration:** N972SA
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** —
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

An inadequate service bulletin which did not require measurement of the cyclic trim assembly shaft and did not identify all helicopters in which shaft wear could lead to restricted movement of the lateral cyclic trim.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ATL98IA039) · AI Analytics · CC0 1.0*