# NTSB Accident DEN89LA167
> **PIPER PA-25** · 1989-07-11 · WH SULPHUR SPGS, MT, USA · NONE
## Event
- **NTSB number:** DEN89LA167
- **Event ID:** 20001213X28807
- **Type:** Accident
- **Date:** 1989-07-11
- **Location:** WH SULPHUR SPGS, MT, USA
- **Coordinates:** 46.570991, -111.000373
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** PIPER
- **Model:** PA-25
- **Registration:** N6663Z
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

THE PILOT FAILED TO MAINTAIN ADEQUATE AIRSPEED DURING AN AERIAL APPLICATION MANEUVER AND INADVERTENTLY ALLOWED THE AIRCRAFT TO MUSH INTO THE GROUND.  UNFAVORABLE WIND AND TURBULENCE WERE CONSIDERED TO BE CONTRIBUTING FACTORS.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=DEN89LA167) · AI Analytics · CC0 1.0*