|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Locale Reference||airport : adq.airport|
|Altitude||msl bound lower : 4000|
msl bound upper : 8000
|Controlling Facilities||artcc : zan.artcc|
|Operator||general aviation : personal|
|Make Model Name||Skyhawk 172/Cutlass 172|
|Operating Under FAR Part||Part 91|
|Flight Phase||cruise : level|
|Function||flight crew : single pilot|
|Qualification||pilot : commercial|
pilot : multi engine
pilot : instrument
|Experience||flight time last 90 days : 120|
flight time total : 420
flight time type : 220
|Affiliation||government : faa|
|Function||controller : radar|
|Anomaly||inflight encounter : weather|
|Independent Detector||other flight crewa|
|Resolutory Action||controller : issued new clearance|
flight crew : exited adverse environment
|Problem Areas||ATC Human Performance|
Flight Crew Human Performance
I was flying IMC/IFR from homer, ak, to kodiak, ak. The climb out was non eventful. I broke out into VMC at some point on climb out and enjoyed clear WX until I was over afognak island. The tops gradually rose in height until we were IMC. About 10 mins past that point, I began to ice up. My windshield got trace amounts, as did the wings. It was not much, but it was enough to result in my struggling to maintain altitude. I required 1000 ft lower, but center replied 'unable.' 5 mins later, I requested it again and received the same response. Soon thereafter, center asked me if I was receiving ice, and I replied 'yes.' center then assigned me the lower altitude. Upon descending, the ice began to melt, and I breathed a whole lot easier. The rest of the approach was uneventful. My perceptions of icing were based only on book knowledge and not experience. Just because I did not ice up in the IMC out of homer did not mean I would not ice up other places. I learned that on this occasion. The bright sunny day between the IMC conditions distracted me from paying attention to my outside air temperature gauge. My preflight briefing included the icing level, but I either did not take close enough note of it or it was the icing level that applied to homer, and not to kodiak. The 2 places differ in WX very much on any given day. Every flight I make now, IFR or VFR, outside air temperature and icing forecasts will be paid very close scrutiny. This will foster better situational awareness for me, and make me a much safer pilot. Actually, I already am a safer pilot as a result of this experience. I will never again fail to scrutinize approaching IMC for icing. It is an insidious trap that could have resulted in some bad things. I hope every pilot that reads this takes note and stays away from icing. It does happen and it will stack the deck against you if you are not ready to avoid it completely.
Original NASA ASRS Text
Title: A C-172 PLT ENCOUNTERS ICE AND DSNDS TO EXIT ADVERSE ENVIRONMENT.
Narrative: I WAS FLYING IMC/IFR FROM HOMER, AK, TO KODIAK, AK. THE CLBOUT WAS NON EVENTFUL. I BROKE OUT INTO VMC AT SOME POINT ON CLB OUT AND ENJOYED CLR WX UNTIL I WAS OVER AFOGNAK ISLAND. THE TOPS GRADUALLY ROSE IN HEIGHT UNTIL WE WERE IMC. ABOUT 10 MINS PAST THAT POINT, I BEGAN TO ICE UP. MY WINDSHIELD GOT TRACE AMOUNTS, AS DID THE WINGS. IT WAS NOT MUCH, BUT IT WAS ENOUGH TO RESULT IN MY STRUGGLING TO MAINTAIN ALT. I REQUIRED 1000 FT LOWER, BUT CTR REPLIED 'UNABLE.' 5 MINS LATER, I REQUESTED IT AGAIN AND RECEIVED THE SAME RESPONSE. SOON THEREAFTER, CTR ASKED ME IF I WAS RECEIVING ICE, AND I REPLIED 'YES.' CTR THEN ASSIGNED ME THE LOWER ALT. UPON DSNDING, THE ICE BEGAN TO MELT, AND I BREATHED A WHOLE LOT EASIER. THE REST OF THE APCH WAS UNEVENTFUL. MY PERCEPTIONS OF ICING WERE BASED ONLY ON BOOK KNOWLEDGE AND NOT EXPERIENCE. JUST BECAUSE I DID NOT ICE UP IN THE IMC OUT OF HOMER DID NOT MEAN I WOULD NOT ICE UP OTHER PLACES. I LEARNED THAT ON THIS OCCASION. THE BRIGHT SUNNY DAY BTWN THE IMC CONDITIONS DISTRACTED ME FROM PAYING ATTN TO MY OUTSIDE AIR TEMP GAUGE. MY PREFLT BRIEFING INCLUDED THE ICING LEVEL, BUT I EITHER DID NOT TAKE CLOSE ENOUGH NOTE OF IT OR IT WAS THE ICING LEVEL THAT APPLIED TO HOMER, AND NOT TO KODIAK. THE 2 PLACES DIFFER IN WX VERY MUCH ON ANY GIVEN DAY. EVERY FLT I MAKE NOW, IFR OR VFR, OUTSIDE AIR TEMP AND ICING FORECASTS WILL BE PAID VERY CLOSE SCRUTINY. THIS WILL FOSTER BETTER SITUATIONAL AWARENESS FOR ME, AND MAKE ME A MUCH SAFER PLT. ACTUALLY, I ALREADY AM A SAFER PLT AS A RESULT OF THIS EXPERIENCE. I WILL NEVER AGAIN FAIL TO SCRUTINIZE APCHING IMC FOR ICING. IT IS AN INSIDIOUS TRAP THAT COULD HAVE RESULTED IN SOME BAD THINGS. I HOPE EVERY PLT THAT READS THIS TAKES NOTE AND STAYS AWAY FROM ICING. IT DOES HAPPEN AND IT WILL STACK THE DECK AGAINST YOU IF YOU ARE NOT READY TO AVOID IT COMPLETELY.
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.