|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1801 To 2400|
|Locale Reference||airport : smo.airport|
|Altitude||msl single value : 9000|
|Controlling Facilities||tracon : sct.tracon|
tower : wjf.tower
|Operator||general aviation : personal|
|Make Model Name||PA-32 Cherokee Six/Lance/Saratoga|
|Operating Under FAR Part||Part 91|
|Flight Phase||descent : intermediate altitude|
|Function||flight crew : single pilot|
|Qualification||pilot : private|
pilot : instrument
|Experience||flight time last 90 days : 60|
flight time total : 400
flight time type : 125
|Function||observation : passenger|
|Anomaly||aircraft equipment problem : critical|
inflight encounter : weather
inflight encounter other
|Independent Detector||aircraft equipment other aircraft equipment : altimeter and airspeed|
other flight crewa
|Resolutory Action||controller : provided flight assist|
flight crew : diverted to another airport
flight crew : regained aircraft control
flight crew : exited adverse environment
While flying a cherokee 6 on an IFR flight plan at night and over mountains, with 6 passenger, I was given a controled descent on approach to smo that went directly into severe icing conditions. The result was complete loss of airspeed indicator, altimeter, and vsi. The windscreen had iced over as well and there was no forward vision at 9000 ft MSL. At this point the aircraft began to sink under the weight of the ice and the loss of lift from the drag/leading edge disruption. I attempted several times to contact approach, but received no response and finally after I stated that I would need assistance or have to declare an emergency would they respond, the controller diverted me to fox field after he realized I could not maintain my altitude. The descent and landing at fox was uneventful. I think this could have been prevented by a better preflight WX briefing and by better handling of the controllers by not placing this aircraft into severe icing conditions.
Original NASA ASRS Text
Title: PIPER CHEROKEE 6 INST RATED PVT PLT FLEW INTO UNFORECASTED WX CAUSING A LOSS OF HIS ALTIMETER ACCURACY AND AIRSPD INDICATOR, AS WELL AS LOSING ALT DUE TO ACFT ICING. HE REQUESTED HELP FROM ARTCC CTLR IN DIVERTING TO LAND.
Narrative: WHILE FLYING A CHEROKEE 6 ON AN IFR FLT PLAN AT NIGHT AND OVER MOUNTAINS, WITH 6 PAX, I WAS GIVEN A CTLED DSCNT ON APCH TO SMO THAT WENT DIRECTLY INTO SEVERE ICING CONDITIONS. THE RESULT WAS COMPLETE LOSS OF AIRSPD INDICATOR, ALTIMETER, AND VSI. THE WINDSCREEN HAD ICED OVER AS WELL AND THERE WAS NO FORWARD VISION AT 9000 FT MSL. AT THIS POINT THE ACFT BEGAN TO SINK UNDER THE WT OF THE ICE AND THE LOSS OF LIFT FROM THE DRAG/LEADING EDGE DISRUPTION. I ATTEMPTED SEVERAL TIMES TO CONTACT APCH, BUT RECEIVED NO RESPONSE AND FINALLY AFTER I STATED THAT I WOULD NEED ASSISTANCE OR HAVE TO DECLARE AN EMER WOULD THEY RESPOND, THE CTLR DIVERTED ME TO FOX FIELD AFTER HE REALIZED I COULD NOT MAINTAIN MY ALT. THE DSCNT AND LNDG AT FOX WAS UNEVENTFUL. I THINK THIS COULD HAVE BEEN PREVENTED BY A BETTER PREFLT WX BRIEFING AND BY BETTER HANDLING OF THE CTLRS BY NOT PLACING THIS ACFT INTO SEVERE ICING CONDITIONS.
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.