|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Locale Reference||airport : tex.airport|
|Altitude||msl single value : 22000|
|Controlling Facilities||artcc : zdv.artcc|
|Operator||general aviation : personal|
|Make Model Name||Chancellor 414A & C414|
|Operating Under FAR Part||Part 91|
|Flight Phase||cruise : level|
|Function||flight crew : single pilot|
|Qualification||pilot : private|
pilot : multi engine
pilot : instrument
pilot : commercial
|Experience||flight time last 90 days : 50|
flight time total : 1800
flight time type : 210
|Affiliation||government : faa|
|Function||controller : radar|
|Anomaly||inflight encounter : weather|
inflight encounter other
|Independent Detector||other flight crewa|
|Resolutory Action||flight crew : took evasive action|
flight crew : regained aircraft control
flight crew : exited adverse environment
|Problem Areas||Environmental Factor|
Flight Crew Human Performance
Was flying from dallas, tx, to tex when I encountered severe clear ice at FL270. True airspeed 204 KTS. I started to descend but got caught in an updraft at 2100 FPM. Ice was clear and built up to 4 inches on wings in approximately 30 seconds. All controls froze and became inverted after a stall. Descended 10K ft in approximately 40 seconds inverted and in a spin. Ice broke off and regained control of aircraft 1500-2000 ft AGL. Deice equipment could not handle this ice. Ice when hit the windshield was about the size of a silver dollar to a half dollar. Thank god for inverted flight training and warmer WX. Callback conversation with reporter revealed the following information: during callback, the reporter stated that he encountered severe ice the size of pancakes which accumulated on the wings 4-6 inches in 20 seconds. The temperature was -24 degrees C and he was in and out of cumulus clouds. He first encountered an updraft which he claims was ice on the elevator that caused the aircraft to pitch up. Then he got into an inverted spin at FL220. The ice broke off at 13000 ft and he was able to regain control of the aircraft at 800 ft. The reporter then climbed to 11000 ft and contacted ZDV where they indicated that they were surprised that he was still alive. The controller wanted him to climb to 16000 ft but he requested to stay at 11000 ft to remain clear of the ice. Reporter claims that he was very shook up. The next day, the reporter did a preflight where everything appeared to be normal. He then flew to florida and discovered after landing that the elevator was twisted and that the skin was starting to come off. Reporter feels that even though he was preoccupied on the preflight, that he would have noticed something like that. He feels that the damage was caused in the icing incident, but did not become noticeable until after the flight to florida.
Original NASA ASRS Text
Title: A C414 PLT ENCOUNTERS SEVERE CLR ICE AT FL220 AND LOST CTL OF THE ACFT IN AN INVERTED SPIN. THE PLT REGAINED CTL OF THE ACFT AT 1500 FT.
Narrative: WAS FLYING FROM DALLAS, TX, TO TEX WHEN I ENCOUNTERED SEVERE CLR ICE AT FL270. TRUE AIRSPD 204 KTS. I STARTED TO DSND BUT GOT CAUGHT IN AN UPDRAFT AT 2100 FPM. ICE WAS CLR AND BUILT UP TO 4 INCHES ON WINGS IN APPROX 30 SECONDS. ALL CTLS FROZE AND BECAME INVERTED AFTER A STALL. DSNDED 10K FT IN APPROX 40 SECONDS INVERTED AND IN A SPIN. ICE BROKE OFF AND REGAINED CTL OF ACFT 1500-2000 FT AGL. DEICE EQUIP COULD NOT HANDLE THIS ICE. ICE WHEN HIT THE WINDSHIELD WAS ABOUT THE SIZE OF A SILVER DOLLAR TO A HALF DOLLAR. THANK GOD FOR INVERTED FLT TRAINING AND WARMER WX. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: DURING CALLBACK, THE RPTR STATED THAT HE ENCOUNTERED SEVERE ICE THE SIZE OF PANCAKES WHICH ACCUMULATED ON THE WINGS 4-6 INCHES IN 20 SECONDS. THE TEMP WAS -24 DEGS C AND HE WAS IN AND OUT OF CUMULUS CLOUDS. HE FIRST ENCOUNTERED AN UPDRAFT WHICH HE CLAIMS WAS ICE ON THE ELEVATOR THAT CAUSED THE ACFT TO PITCH UP. THEN HE GOT INTO AN INVERTED SPIN AT FL220. THE ICE BROKE OFF AT 13000 FT AND HE WAS ABLE TO REGAIN CTL OF THE ACFT AT 800 FT. THE RPTR THEN CLBED TO 11000 FT AND CONTACTED ZDV WHERE THEY INDICATED THAT THEY WERE SURPRISED THAT HE WAS STILL ALIVE. THE CTLR WANTED HIM TO CLB TO 16000 FT BUT HE REQUESTED TO STAY AT 11000 FT TO REMAIN CLR OF THE ICE. RPTR CLAIMS THAT HE WAS VERY SHOOK UP. THE NEXT DAY, THE RPTR DID A PREFLT WHERE EVERYTHING APPEARED TO BE NORMAL. HE THEN FLEW TO FLORIDA AND DISCOVERED AFTER LNDG THAT THE ELEVATOR WAS TWISTED AND THAT THE SKIN WAS STARTING TO COME OFF. RPTR FEELS THAT EVEN THOUGH HE WAS PREOCCUPIED ON THE PREFLT, THAT HE WOULD HAVE NOTICED SOMETHING LIKE THAT. HE FEELS THAT THE DAMAGE WAS CAUSED IN THE ICING INCIDENT, BUT DID NOT BECOME NOTICEABLE UNTIL AFTER THE FLT TO FLORIDA.
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.