# NTSB Accident ANC21LA061
> **CESSNA 172** · 2021-07-16 · Skwentna, AK, USA · MINR
## Event
- **NTSB number:** ANC21LA061
- **Event ID:** 20210720103517
- **Type:** Accident
- **Date:** 2021-07-16
- **Location:** Skwentna, AK, USA
- **Coordinates:** 61.918987, -150.99146
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 2
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** CESSNA
- **Model:** 172
- **Registration:** N7137T
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

A partial loss of engine power due to detonation/preignition damage to the No. 2 cylinder. The reason for the detonation/preignition damage could not be determined based on the available evidence.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ANC21LA061) · AI Analytics · CC0 1.0*