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Small aircraft pilot encountered moderate turbulence and up and downdrafts in descent in sct class east airspace.
| Attributes | |
| ACN | 532398 |
| Time | |
| Date | 200112 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | intersection : silex |
| State Reference | CA |
| Altitude | msl bound lower : 10000 msl bound upper : 10500 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Ice Thunderstorm Turbulence other |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, High Wing, 1 Eng, Retractable Gear |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : commercial pilot : atp pilot : cfi pilot : instrument pilot : multi engine |
| Experience | flight time last 90 days : 177 flight time total : 13006 flight time type : 1680 |
| ASRS Report | 532398 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Events | |
| Anomaly | inflight encounter : weather inflight encounter : turbulence inflight encounter other other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted other |
| Supplementary | |
| Problem Areas | Weather |
| Primary Problem | Weather |
Narrative:
VFR descent from 17500 ft, handed off to socal approach. Assigned heading 020 degrees with expedited descent to 10000 ft. Pilot advised clouds, IFR received, moderate clear air turbulence encountered, descent delayed. Landing gear extended and power reduced to 2250 RPM and 17 inches manifold pressure. In order to facilitate descent. Cleared down to 8000 ft. Entered rapidly developing cumulus, unable to descend. Encountered updrafts in excess of 2000 FPM. G forces from 0 - +3, airspeed increased from 125 KTS to 155 KTS. Altitude jumped from 10100 ft to 10500 ft. Severe turbulence and icing in cloud. After exiting descent resumed to 8000 ft. Controller was uninformed of unforecast WX and its severity congestion on frequency precluded the opportunity to properly advise controller of the conditions.
Original NASA ASRS Text
Title: SMA PLT ENCOUNTERED MODERATE TURB AND UP AND DOWNDRAFTS IN DSCNT IN SCT CLASS E AIRSPACE.
Narrative: VFR DSCNT FROM 17500 FT, HANDED OFF TO SOCAL APCH. ASSIGNED HDG 020 DEGS WITH EXPEDITED DSCNT TO 10000 FT. PLT ADVISED CLOUDS, IFR RECEIVED, MODERATE CLR AIR TURB ENCOUNTERED, DSCNT DELAYED. LNDG GEAR EXTENDED AND PWR REDUCED TO 2250 RPM AND 17 INCHES MANIFOLD PRESSURE. IN ORDER TO FACILITATE DSCNT. CLRED DOWN TO 8000 FT. ENTERED RAPIDLY DEVELOPING CUMULUS, UNABLE TO DSND. ENCOUNTERED UPDRAFTS IN EXCESS OF 2000 FPM. G FORCES FROM 0 - +3, AIRSPD INCREASED FROM 125 KTS TO 155 KTS. ALT JUMPED FROM 10100 FT TO 10500 FT. SEVERE TURB AND ICING IN CLOUD. AFTER EXITING DSCNT RESUMED TO 8000 FT. CTLR WAS UNINFORMED OF UNFORECAST WX AND ITS SEVERITY CONGESTION ON FREQ PRECLUDED THE OPPORTUNITY TO PROPERLY ADVISE CTLR OF THE 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.