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A PA30 private pilot, picking up un unforecast icing, leaves his assigned altitude and climbs to VFR on top for his trip out of apa, co.
| Attributes | |
| ACN | 469570 |
| Time | |
| Date | 200004 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : apa.airport |
| State Reference | CO |
| Altitude | msl bound lower : 7000 msl bound upper : 7200 |
| Environment | |
| Flight Conditions | Mixed |
| Weather Elements | Ice |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdv.artcc tracon : d01.tracon |
| Operator | general aviation : personal |
| Make Model Name | PA-30 Twin Comanche |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other vortac |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure : vfr |
| Flight Plan | IFR Combined VFR |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : multi engine pilot : private |
| Experience | flight time last 90 days : 10 flight time total : 1800 flight time type : 60 |
| ASRS Report | 469570 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude inflight encounter : weather inflight encounter : vfr in imc non adherence : far non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : exited adverse environment none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Weather |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Departed centennial airport on VFR flight plan. Received VFR briefing about 45 mins prior to departure. I had filed 'back-up' IFR flight plan. Approximately 10 mi east of centennial, WX deteriorated 'rapidly.' I called center and asked to pick up my IFR clearance and was told it would be a while, remain VFR. I informed center that would not be possible, and received my clearance. On entering clouds, we encountered 'unforecast' icing. We climbed to 'VFR conditions on top,' then flew on to hays, ks. Build-ups and ice required slight deviation in altitude and heading +/-200 ft.
Original NASA ASRS Text
Title: A PA30 PVT PLT, PICKING UP UN UNFORECAST ICING, LEAVES HIS ASSIGNED ALT AND CLBS TO VFR ON TOP FOR HIS TRIP OUT OF APA, CO.
Narrative: DEPARTED CENTENNIAL ARPT ON VFR FLT PLAN. RECEIVED VFR BRIEFING ABOUT 45 MINS PRIOR TO DEP. I HAD FILED 'BACK-UP' IFR FLT PLAN. APPROX 10 MI E OF CENTENNIAL, WX DETERIORATED 'RAPIDLY.' I CALLED CTR AND ASKED TO PICK UP MY IFR CLRNC AND WAS TOLD IT WOULD BE A WHILE, REMAIN VFR. I INFORMED CTR THAT WOULD NOT BE POSSIBLE, AND RECEIVED MY CLRNC. ON ENTERING CLOUDS, WE ENCOUNTERED 'UNFORECAST' ICING. WE CLBED TO 'VFR CONDITIONS ON TOP,' THEN FLEW ON TO HAYS, KS. BUILD-UPS AND ICE REQUIRED SLIGHT DEV IN ALT AND HDG +/-200 FT.
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.