# NTSB Accident LAX98LA200
> **Hughes 369HS** · 1998-06-16 · PACIFIC OCEAN, PO · FATL
## Event
- **NTSB number:** LAX98LA200
- **Event ID:** 20001211X10358
- **Type:** Accident
- **Date:** 1998-06-16
- **Location:** PACIFIC OCEAN, PO
## Injuries
- **Highest injury:** FATL
- **Fatal:** 2
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** Hughes
- **Model:** 369HS
- **Registration:** N95MS
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The improper shimmying of the tail rotor driveshaft by maintenance personnel which induced fatigue in the tail rotor driveshaft coupling causing it to fail, which resulted in a loss of tail rotor control.  A factor is the failure of the pilot to recognize the warning vibrations indicating impending failure of the coupling.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX98LA200) · AI Analytics · CC0 1.0*