# NTSB Incident CHI91IA297
> **BOEING 727-224** · 1991-09-20 · DETROIT, MI, USA · NONE
## Event
- **NTSB number:** CHI91IA297
- **Event ID:** 20001212X18055
- **Type:** Incident
- **Date:** 1991-09-20
- **Location:** DETROIT, MI, USA
- **Coordinates:** 42.219383, -83.350677
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 136
- **Total aboard:** 136
## Aircraft
- **Make:** BOEING
- **Model:** 727-224
- **Registration:** N88704
- **FAR Part:** 121
- **Engines:** 3
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

INADEQUATE MAINTENANCE INSPECTION OF THE MAIN LANDING GEAR ACTUATOR ASSEMBLY BY COMPANY MAINTENANCE PERSONNEL.  A FACTOR IN THE INCIDENT IS INADEQUATE DESIGN OF THE LANDING GEAR ACTUATOR BY THE MANUFACTURER.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI91IA297) · AI Analytics · CC0 1.0*