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Twin cessna captain reported a window heat switch malfunction.
| Attributes | |
| ACN | 1517026 |
| Time | |
| Date | 201802 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Tower |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | Cessna Twin Piston Undifferentiated or Other Model |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Window Ice/Rain System |
| Person 1 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Commercial |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
Immediately after takeoff I noticed the windshield light came on in the annunciator panel. My initial thought to this was that I must have flipped on the wrong switch. I thought I had flipped on the windshield heater during takeoff instead of the prop anti-ice; however; upon looking down at the switch I realized I had never flipped the windshield heat switch. The windshield heat was on even though the switch was off. I now began to wonder how long the light had been on. Did it come on during the takeoff roll or before rolling onto the runway. I was worried about the 20 second limitation on the windshield heat. After that initial 3 second thought; I began to flip the windshield heat switch on and off in an attempt to shut off the windshield heat. The windshield heat stayed on. I paused for a second to think about what was going on before giving the switch another try. This time when I flipped the switch to the off position; the light on the annunciator panel finally went out. From this point on; I was unable to get the windshield heat to work. It did not look like a circuit breaker popped. After giving the switch a couple more tries in an attempt to see if the windshield heat would come back again; I finally turned the switch off and kept it off; thinking the switch may have failed or that there may have been an electrical short. There was no icing; and the weather had improved so I decided to complete the flight.
Original NASA ASRS Text
Title: Twin Cessna Captain reported a window heat switch malfunction.
Narrative: Immediately after takeoff I noticed the windshield light came on in the annunciator panel. My initial thought to this was that I must have flipped on the wrong switch. I thought I had flipped on the windshield heater during takeoff instead of the prop anti-ice; however; upon looking down at the switch I realized I had never flipped the windshield heat switch. The windshield heat was on even though the switch was off. I now began to wonder how long the light had been on. Did it come on during the takeoff roll or before rolling onto the runway. I was worried about the 20 second limitation on the windshield heat. After that initial 3 second thought; I began to flip the windshield heat switch on and off in an attempt to shut off the windshield heat. The windshield heat stayed on. I paused for a second to think about what was going on before giving the switch another try. This time when I flipped the switch to the off position; the light on the annunciator panel finally went out. From this point on; I was unable to get the windshield heat to work. It did not look like a circuit breaker popped. After giving the switch a couple more tries in an attempt to see if the windshield heat would come back again; I finally turned the switch off and kept it off; thinking the switch may have failed or that there may have been an electrical short. There was no icing; and the weather had improved so I decided to complete the flight.
Data retrieved from NASA's ASRS site 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.