# NTSB Accident MIA97LA103
> **Hughes TH-55** · 1997-03-28 · CULLMAN, AL, USA · SERS
## Event
- **NTSB number:** MIA97LA103
- **Event ID:** 20001208X07601
- **Type:** Accident
- **Date:** 1997-03-28
- **Location:** CULLMAN, AL, USA
- **Coordinates:** 34.169769, -86.829269
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 2
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** Hughes
- **Model:** TH-55
- **Registration:** N818D
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

a loss of engine power for undetermined reasons and the pilot-in-command's failure to maintain control of the helicopter.  Factors in this accident were: an improper autorotation as a result of improper collective use and resulting failure to maintain main rotor rpm.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=MIA97LA103) · AI Analytics · CC0 1.0*