# NTSB Accident IAD99LA011
> **Ryan NAVION-A** · 1998-10-20 · EAST MORICHES, NY, USA · NONE
## Event
- **NTSB number:** IAD99LA011
- **Event ID:** 20001211X11277
- **Type:** Accident
- **Date:** 1998-10-20
- **Location:** EAST MORICHES, NY, USA
- **Coordinates:** 40.81002, -72.759956
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** Ryan
- **Model:** NAVION-A
- **Registration:** N4529K
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The student pilot's failure to maintain adequate airspeed and the certified flight instructor's inadequate supervision.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=IAD99LA011) · AI Analytics · CC0 1.0*