# NTSB Incident CHI93IA078
> **FOKKER F-28 MK 1000** · 1993-01-26 · DETROIT, MI, USA · NONE
## Event
- **NTSB number:** CHI93IA078
- **Event ID:** 20001211X11666
- **Type:** Incident
- **Date:** 1993-01-26
- **Location:** DETROIT, MI, USA
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 42
- **Total aboard:** 42
## Aircraft
- **Make:** FOKKER
- **Model:** F-28 MK 1000
- **Registration:** N452US
- **FAR Part:** 121
- **Engines:** 2
- **Damage:** —
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

IMPROPER LUBRICATION OF THE HORIZONTAL STABILIZER GEARBOX BY COMPANY MAINTENANCE PERSONNEL. A FACTOR WAS THE MANUFACTURER'S INADEQUATE SERVICE PROCEDURE.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI93IA078) · AI Analytics · CC0 1.0*