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An EMB120 flight crew declared an emergency and landed at azo after seeing smoke coming from the air conditioning system.
| Attributes | |
| ACN | 435335 |
| Time | |
| Date | 199904 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : azo.airport |
| State Reference | MI |
| Altitude | msl single value : 4000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tower : azo.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Brasilia EMB-120 All Series |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 3000 flight time type : 500 |
| ASRS Report | 435335 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : landed in emergency condition flight crew : declared emergency |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Ambiguous |
| Air Traffic Incident | other |
Narrative:
On final approach to azo smoke filled the cockpit and cabin from one of the packs. We shut down the packs and the smoke stopped. We took appropriate actions. Declared an emergency with tower and continued to land. After landing we took the immediate taxiway, shut down and evacuate/evacuationed the aircraft with no further issues. Callback conversation with reporter revealed the following information: reporter states during callback that the flight crew did not observe any other indication in the cockpit that would indicate a serious condition. There was no annunciation of a pack overheat or overpressure. Reporter further states there was an odor of oil in the cockpit and that the smoke and odor seemed to dissipate after shutting down one of the air conditioning packs. Later it was determined by maintenance that an engine oil seal was the probable cause of the smoke and odor and the aircraft was returned to service without further interruption.
Original NASA ASRS Text
Title: AN EMB120 FLC DECLARED AN EMER AND LANDED AT AZO AFTER SEEING SMOKE COMING FROM THE AIR CONDITIONING SYS.
Narrative: ON FINAL APCH TO AZO SMOKE FILLED THE COCKPIT AND CABIN FROM ONE OF THE PACKS. WE SHUT DOWN THE PACKS AND THE SMOKE STOPPED. WE TOOK APPROPRIATE ACTIONS. DECLARED AN EMER WITH TWR AND CONTINUED TO LAND. AFTER LNDG WE TOOK THE IMMEDIATE TXWY, SHUT DOWN AND EVACED THE ACFT WITH NO FURTHER ISSUES. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES DURING CALLBACK THAT THE FLC DID NOT OBSERVE ANY OTHER INDICATION IN THE COCKPIT THAT WOULD INDICATE A SERIOUS CONDITION. THERE WAS NO ANNUNCIATION OF A PACK OVERHEAT OR OVERPRESSURE. RPTR FURTHER STATES THERE WAS AN ODOR OF OIL IN THE COCKPIT AND THAT THE SMOKE AND ODOR SEEMED TO DISSIPATE AFTER SHUTTING DOWN ONE OF THE AIR CONDITIONING PACKS. LATER IT WAS DETERMINED BY MAINT THAT AN ENG OIL SEAL WAS THE PROBABLE CAUSE OF THE SMOKE AND ODOR AND THE ACFT WAS RETURNED TO SVC WITHOUT FURTHER INTERRUPTION.
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.