# NTSB Incident MIA92IA020
> **BOEING 727-31** · 1991-11-02 · GULF OF MEXICO · NONE
## Event
- **NTSB number:** MIA92IA020
- **Event ID:** 20001212X18486
- **Type:** Incident
- **Date:** 1991-11-02
- **Location:** GULF OF MEXICO
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 118
- **Total aboard:** 118
## Aircraft
- **Make:** BOEING
- **Model:** 727-31
- **Registration:** N839TW
- **FAR Part:** 121
- **Engines:** 3
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

THE OVERFILLING OF THE FORWARD LAVATORY DURING SERVICING AND THE FAILURE TO REPLACE THE FILL/RINSE LINE CAP AFTER SERVICING BY THE GROUND SERVICE PERSONNEL WHICH RESULTED IN THE LAVATORY VENTING FLUID THROUGH THE FILL/RINSE LINE DURING FLIGHT AND THE SUBSEQUENT ICE FORMATION AND INGESTION OF ICE INTO NUMBER THREE ENGINE.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=MIA92IA020) · AI Analytics · CC0 1.0*