# NTSB Accident CHI93LA311
> **PIPER PA-28R-200** · 1993-08-06 · MILLARD, NE, USA · NONE
## Event
- **NTSB number:** CHI93LA311
- **Event ID:** 20001211X13096
- **Type:** Accident
- **Date:** 1993-08-06
- **Location:** MILLARD, NE, USA
- **Coordinates:** 41.210651, -96.120033
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 4
- **Total aboard:** 4
## Aircraft
- **Make:** PIPER
- **Model:** PA-28R-200
- **Registration:** N233LC
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

IMPROPER MAINTENANCE/INSPECTION OF THE AIRCRAFT BY (OTHER) MAINTENANCE PERSONNEL, AND SUBSEQUENT BLOCKAGE OF THE INDUCTION AIR SYSTEM BY AN OBJECT (ALTERNATE AIR DOOR) THAT WAS NOT REMOVED DURING PREVIOUS MAINTENANCE.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI93LA311) · AI Analytics · CC0 1.0*