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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Anti icing all on except continuous ignition. Aircraft acquired ice at 11000. On descent ice around left engine inlet entered air scoop. Engine flamed out. Was restarted at 7000 ft.
| Attributes | |
| ACN | 190828 |
| Time | |
| Date | 199109 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : anc |
| State Reference | AK |
| Altitude | msl bound lower : 7000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : phl |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other descent other |
| Route In Use | enroute airway : v440 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 300 flight time total : 1250 |
| ASRS Report | 190828 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical inflight encounter : weather non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem flight crew : regained aircraft control |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
We had encountered moderate icing conditions at 11000 ft. All icing protection was on prior to entering the icing conditions with the exception of continuous ignition. Propeller deice, windshield heat, pitot heat, and engine inlet heat all seemed to function properly. The captain noticed an accumulation of ice on the left engine inlet. Upon descent, and subsequent level off at 7000 ft the #1 (left) engine flamed out. We confirmed the engine failure and initiated the engine failure procedure. We then initiated the engine restart procedure. We successfully restarted the #1 engine within 45 seconds of confirming the engine failure. No altitude was lost and we continued a normal flight and made a normal landing at anchorage. I believe our descent to 7000 ft loosened the ice buildup on the #1 engine inlet. Enough ice may have been ingested into the inlet to cause the engine to flame out. Since continuous ignition was not on at the time of engine failure, there was no source of ignition to sustain the flame during the apparent ice ingestion. A flameout could have been avoided had the continuous ignition been on. A subsequent check of all ice protection system, including the engine inlet heat, showed all functioning properly.
Original NASA ASRS Text
Title: ANTI ICING ALL ON EXCEPT CONTINUOUS IGNITION. ACFT ACQUIRED ICE AT 11000. ON DSCNT ICE AROUND L ENG INLET ENTERED AIR SCOOP. ENG FLAMED OUT. WAS RESTARTED AT 7000 FT.
Narrative: WE HAD ENCOUNTERED MODERATE ICING CONDITIONS AT 11000 FT. ALL ICING PROTECTION WAS ON PRIOR TO ENTERING THE ICING CONDITIONS WITH THE EXCEPTION OF CONTINUOUS IGNITION. PROP DEICE, WINDSHIELD HEAT, PITOT HEAT, AND ENG INLET HEAT ALL SEEMED TO FUNCTION PROPERLY. THE CAPT NOTICED AN ACCUMULATION OF ICE ON THE L ENG INLET. UPON DSCNT, AND SUBSEQUENT LEVEL OFF AT 7000 FT THE #1 (L) ENG FLAMED OUT. WE CONFIRMED THE ENG FAILURE AND INITIATED THE ENG FAILURE PROC. WE THEN INITIATED THE ENG RESTART PROC. WE SUCCESSFULLY RESTARTED THE #1 ENG WITHIN 45 SECONDS OF CONFIRMING THE ENG FAILURE. NO ALT WAS LOST AND WE CONTINUED A NORMAL FLT AND MADE A NORMAL LNDG AT ANCHORAGE. I BELIEVE OUR DSCNT TO 7000 FT LOOSENED THE ICE BUILDUP ON THE #1 ENG INLET. ENOUGH ICE MAY HAVE BEEN INGESTED INTO THE INLET TO CAUSE THE ENG TO FLAME OUT. SINCE CONTINUOUS IGNITION WAS NOT ON AT THE TIME OF ENG FAILURE, THERE WAS NO SOURCE OF IGNITION TO SUSTAIN THE FLAME DURING THE APPARENT ICE INGESTION. A FLAMEOUT COULD HAVE BEEN AVOIDED HAD THE CONTINUOUS IGNITION BEEN ON. A SUBSEQUENT CHK OF ALL ICE PROTECTION SYS, INCLUDING THE ENG INLET HEAT, SHOWED ALL FUNCTIONING PROPERLY.
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.