# NTSB Accident ANC99LA143
> **Diehl INTERSTATE S-4** · 1999-09-11 · ANCHORAGE, AK, USA · NONE
## Event
- **NTSB number:** ANC99LA143
- **Event ID:** 20001212X19669
- **Type:** Accident
- **Date:** 1999-09-11
- **Location:** ANCHORAGE, AK, USA
- **Coordinates:** 61.160453, -149.99002
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** Diehl
- **Model:** INTERSTATE S-4
- **Registration:** N4BZ
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot's inadequate planning/decision, and his failure to maintain directional control of the airplane.  Factors in the accident were a short runway/lake area for departure, and the pilot's extension of the landing gear steering system (water rudders) during the takeoff run.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ANC99LA143) · AI Analytics · CC0 1.0*