# NTSB Accident WPR15LA249
> **SCHWEIZER 269C - UNDESIGNAT** · 2015-08-23 · Mesa, AZ, USA · MINR
## Event
- **NTSB number:** WPR15LA249
- **Event ID:** 20150824X75351
- **Type:** Accident
- **Date:** 2015-08-23
- **Location:** Mesa, AZ, USA
- **Coordinates:** 33.460834, -111.728332
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 1
- **Total aboard:** 2
## Aircraft
- **Make:** SCHWEIZER
- **Model:** 269C - UNDESIGNAT
- **Registration:** N315TV
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The disbondment of a main rotor damper, which resulted in the degradation of its damping action and led to excessive main rotor vibrations and oscillations that caused substantial damage to the helicopter in flight and led to a hard landing.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR15LA249) · AI Analytics · CC0 1.0*