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Flight crew of B727 has smoke in cockpit and cabin during taxi after landing. Left duct overheat light activates. As checklist is completed the smoke dissipates and passenger deplane normally.
| Attributes | |
| ACN | 386866 |
| Time | |
| Date | 199711 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : stl |
| State Reference | MO |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground other : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 13500 flight time type : 650 |
| ASRS Report | 386866 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
After landing during taxi, smoke was noticed in cockpit and cabin followed by a left duct overheat light on the flight engineer's panel. The left pack was secured and the duct overheat checklist completed. This allowed the smoke to dissipate and the passenger deplaned normally. Investigation discovered the left pack fan circuit breaker had popped which prevented cooling air from circulating around the left pack. By the time the duct overheat light came on, smoke had already entered the aircraft. This is a recurring problem on B727's which have led to evacuate/evacuations. Improved warnings of impending air conditioning pack overheat may reduce the problem.
Original NASA ASRS Text
Title: FLC OF B727 HAS SMOKE IN COCKPIT AND CABIN DURING TAXI AFTER LNDG. L DUCT OVERHEAT LIGHT ACTIVATES. AS CHKLIST IS COMPLETED THE SMOKE DISSIPATES AND PAX DEPLANE NORMALLY.
Narrative: AFTER LNDG DURING TAXI, SMOKE WAS NOTICED IN COCKPIT AND CABIN FOLLOWED BY A L DUCT OVERHEAT LIGHT ON THE FE'S PANEL. THE L PACK WAS SECURED AND THE DUCT OVERHEAT CHKLIST COMPLETED. THIS ALLOWED THE SMOKE TO DISSIPATE AND THE PAX DEPLANED NORMALLY. INVESTIGATION DISCOVERED THE L PACK FAN CIRCUIT BREAKER HAD POPPED WHICH PREVENTED COOLING AIR FROM CIRCULATING AROUND THE L PACK. BY THE TIME THE DUCT OVERHEAT LIGHT CAME ON, SMOKE HAD ALREADY ENTERED THE ACFT. THIS IS A RECURRING PROB ON B727'S WHICH HAVE LED TO EVACS. IMPROVED WARNINGS OF IMPENDING AIR CONDITIONING PACK OVERHEAT MAY REDUCE THE PROB.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.