# NTSB Incident FTW88IA037
> **BOEING 727-243** · 1987-12-03 · HOUSTON, TX, USA · NONE
## Event
- **NTSB number:** FTW88IA037
- **Event ID:** 20001213X32702
- **Type:** Incident
- **Date:** 1987-12-03
- **Location:** HOUSTON, TX, USA
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 87
- **Total aboard:** 87
## Aircraft
- **Make:** BOEING
- **Model:** 727-243
- **Registration:** N571PE
- **FAR Part:** 121
- **Engines:** 3
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

IMPROPER DRILLING OF THE CROSS HOLE IN THE SLAT TRACK BEARING BOLT, WHICH LED TO ITS FAILURE FROM FATIGUE CRACKING.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=FTW88IA037) · AI Analytics · CC0 1.0*