Casualties unknown

Smoke Detector Fails to Activate During Lavatory Fire Incident (N426TE)

Moline, IL, US

On March 31, 1993, an Aerospatiale ATR-42-300 (registration N426TE) operated by Trans States Airlines was involved in an aviation accident near Moline, IL. Investigators recorded the probable cause as: THE PASSENGER'S FAILURE TO EXTINGUISH A CIGARETTE BEFORE PLACING IT INTO THE LAVATORY WASTE BIN. FACTORS RELATED TO THE INCIDENT WERE: AN INOPERATIVE SMOKE DETECTOR IN THE LAVATORY, THE MANUFACTURER'S INADEQUATE MAINTENANCE PROGRAM, AND INADEQUATE REVIEW OF… This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 3 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-10Data APIEditorial standards

A passenger discarded a cigarette before leaving a lavatory. The flight attendant discovered smoke from the waste bin and extinguished the fire. The smoke detector did not activate; the maintenance program lacked cleaning procedures.

Incident Overview

A passenger discarded a cigarette before leaving the lavatory. The flight attendant found smoke issuing from the waste bin and extinguished the fire. There was no indication in the cockpit of smoke or fire.

Post-Incident Inspection

A later check of the smoke detector showed it did not activate when smoke was generated in the lavatory.

Maintenance Program

The operator adhered to the aircraft manufacturer's recommended maintenance program. The program contained no procedure or interval for cleaning smoke detectors or ducting. There was no operational test which demonstrated a detector could sense smoke.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X11940. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.