# NTSB Incident ANC91IA046
> **NIHON YS-11A-600** · 1991-03-27 · ANCHORAGE, AK, USA · NONE
## Event
- **NTSB number:** ANC91IA046
- **Event ID:** 20001212X16526
- **Type:** Incident
- **Date:** 1991-03-27
- **Location:** ANCHORAGE, AK, USA
- **Coordinates:** 61.160049, -149.99028
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 4
- **Total aboard:** 4
## Aircraft
- **Make:** NIHON
- **Model:** YS-11A-600
- **Registration:** N173RV
- **FAR Part:** 091
- **Engines:** 2
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

A JAMMED NOSE GEAR DUE TO INCORRECT INSTALLATION OF THE SHEAR PIN. CONTRIBUTING TO THE ACCIDENT WAS THE INSUFFICIENTLY DEFINED MAINTENANCE PROCEDURE.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ANC91IA046) · AI Analytics · CC0 1.0*