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A DC9 parked on a gate after arrival had the aircraft securing checklist improperly performed leaving the APU running with bleed and pack valves open and pack cooling fans not operating causing overheated air-conditioning ducts and smoke and smell in the cabin.
| Attributes | |
| ACN | 396294 |
| Time | |
| Date | 199803 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : azo |
| State Reference | MI |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | other other : other pilot : flight engineer pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 230 flight time total : 8000 flight time type : 1200 |
| ASRS Report | 396294 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other other : unspecified |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Captain performed first half of securing checklist, leaving APU running and APU bleed open with right pack on. I (first officer) completed second half of securing check assuming APU bleed switch closed and both packs off. Secured with APU running and on ground service bus on APU. In this confign, the dc emergency bus is not powered and pack valves open. AC buses are not powered and heat exchanger cooling fans won't operate. Packs and associated ducting have hot APU bleed air passing through them and into aircraft. Ducts overheat and create smoke in aircraft. Fortunately aircraft was found in time, we as a crew had already left the airport.
Original NASA ASRS Text
Title: A DC9 PARKED ON A GATE AFTER ARR HAD THE ACFT SECURING CHKLIST IMPROPERLY PERFORMED LEAVING THE APU RUNNING WITH BLEED AND PACK VALVES OPEN AND PACK COOLING FANS NOT OPERATING CAUSING OVERHEATED AIR-CONDITIONING DUCTS AND SMOKE AND SMELL IN THE CABIN.
Narrative: CAPT PERFORMED FIRST HALF OF SECURING CHKLIST, LEAVING APU RUNNING AND APU BLEED OPEN WITH R PACK ON. I (FO) COMPLETED SECOND HALF OF SECURING CHK ASSUMING APU BLEED SWITCH CLOSED AND BOTH PACKS OFF. SECURED WITH APU RUNNING AND ON GND SVC BUS ON APU. IN THIS CONFIGN, THE DC EMER BUS IS NOT POWERED AND PACK VALVES OPEN. AC BUSES ARE NOT POWERED AND HEAT EXCHANGER COOLING FANS WON'T OPERATE. PACKS AND ASSOCIATED DUCTING HAVE HOT APU BLEED AIR PASSING THROUGH THEM AND INTO ACFT. DUCTS OVERHEAT AND CREATE SMOKE IN ACFT. FORTUNATELY ACFT WAS FOUND IN TIME, WE AS A CREW HAD ALREADY LEFT THE ARPT.
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.