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A casa 212 freighter flight crew encounters ice en route to yip resulting in the right side pitot tube becoming obstructed.
| Attributes | |
| ACN | 452162 |
| Time | |
| Date | 199910 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : lan.vor |
| State Reference | MI |
| Altitude | msl single value : 11000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Ice Turbulence |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lan.tracon tower : san.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Small Transport |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | descent : approach |
| Route In Use | arrival star : sprtn.3 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : multi engine |
| Experience | flight time last 90 days : 320 flight time total : 2400 flight time type : 750 |
| ASRS Report | 452161 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : multi engine pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance non adherence : far |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : returned to assigned altitude flight crew : exited adverse environment flight crew : overcame equipment problem |
| Consequence | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Weather Aircraft |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were flying a 11000 ft just past lan VOR on the sprtn 3 arrival into yip in IMC and moderate icing conditions. I (captain, PNF) had just received the ATIS at yip and had switched back to the ATC frequency which the first officer had been monitoring when the first officer started to descend to 1500 FPM. I asked what altitude we had been cleared to when the first officer said we were stalling. I saw no indication of a stall on my instruments and as I asked the first officer why he thought we were stalling I also crosschecked the instruments. His airspeed indicator was passing through 100 KTS and decreasing while my airspeed indicator was showing 200 KTS. We quickly determined his pitot tube had stopped working. I took control of the airplane at 10000 ft and climbed back to 11000 ft. The problem was the right side pitot tube heat had malfunctioned and the tube had become iced over. I flew the rest of the leg back to yip and wrote the discrepancy in the flight log.
Original NASA ASRS Text
Title: A CASA 212 FREIGHTER FLC ENCOUNTERS ICE ENRTE TO YIP RESULTING IN THE R SIDE PITOT TUBE BECOMING OBSTRUCTED.
Narrative: WE WERE FLYING A 11000 FT JUST PAST LAN VOR ON THE SPRTN 3 ARR INTO YIP IN IMC AND MODERATE ICING CONDITIONS. I (CAPT, PNF) HAD JUST RECEIVED THE ATIS AT YIP AND HAD SWITCHED BACK TO THE ATC FREQ WHICH THE FO HAD BEEN MONITORING WHEN THE FO STARTED TO DSND TO 1500 FPM. I ASKED WHAT ALT WE HAD BEEN CLRED TO WHEN THE FO SAID WE WERE STALLING. I SAW NO INDICATION OF A STALL ON MY INSTS AND AS I ASKED THE FO WHY HE THOUGHT WE WERE STALLING I ALSO XCHKED THE INSTS. HIS AIRSPD INDICATOR WAS PASSING THROUGH 100 KTS AND DECREASING WHILE MY AIRSPD INDICATOR WAS SHOWING 200 KTS. WE QUICKLY DETERMINED HIS PITOT TUBE HAD STOPPED WORKING. I TOOK CTL OF THE AIRPLANE AT 10000 FT AND CLBED BACK TO 11000 FT. THE PROB WAS THE R SIDE PITOT TUBE HEAT HAD MALFUNCTIONED AND THE TUBE HAD BECOME ICED OVER. I FLEW THE REST OF THE LEG BACK TO YIP AND WROTE THE DISCREPANCY IN THE FLT LOG.
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.