# NTSB Accident MIA91FA140
> **MCDONNELL DOUGLAS DC-3C** · 1991-05-10 · AGUADILLA, PR · FATL
## Event
- **NTSB number:** MIA91FA140
- **Event ID:** 20001212X17063
- **Type:** Accident
- **Date:** 1991-05-10
- **Location:** AGUADILLA, PR
## Injuries
- **Highest injury:** FATL
- **Fatal:** 2
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** MCDONNELL DOUGLAS
- **Model:** DC-3C
- **Registration:** N134FS
- **FAR Part:** 135
- **Engines:** 2
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

THE PILOT IN COMMAND'S FAILURE TO MAINTAIN AIRSPEED (VS) AFTER A PARTIAL LOSS OF ENGINE POWER ON THE LEFT ENGINE DUE TO FAILURE OF THE NO. 8 ENGINE ASSEMBLY CYLINDER.  THIS RESULTED IN AN IN FLIGHT LOSS OF CONTROL (STALL), AND IN FLIGHT COLLISION WITH TERRAIN.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=MIA91FA140) · AI Analytics · CC0 1.0*