# NTSB Incident CHI88IA159
> **BOEING 737-130** · 1988-07-06 · INDIANAPOLIS, IN, USA · NONE
## Event
- **NTSB number:** CHI88IA159
- **Event ID:** 20001213X26169
- **Type:** Incident
- **Date:** 1988-07-06
- **Location:** INDIANAPOLIS, IN, USA
- **Coordinates:** 39.729709, -86.290481
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 36
- **Total aboard:** 36
## Aircraft
- **Make:** BOEING
- **Model:** 737-130
- **Registration:** N409PE
- **FAR Part:** 121
- **Engines:** 2
- **Damage:** —
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

FAILURE TO ENSURE PROPER ALIGNMENT AND CLOSURE OF THE AUXILLARY POWER UNIT LOWER SHROUD WITH THE FIRE SEAL UPON COMPLETION OF A MAINTENANCE ACTION.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI88IA159) · AI Analytics · CC0 1.0*