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Unauthorized uncoordinated heading track change in IMC conditions. Deviation non adherence to ATC clearance.
| Attributes | |
| ACN | 203938 |
| Time | |
| Date | 199203 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : dag |
| State Reference | CA |
| Altitude | msl bound lower : 11000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : instructional |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | cruise other |
| Route In Use | enroute airway : zla |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : cfi pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 120 flight time total : 900 flight time type : 35 |
| ASRS Report | 203938 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | inflight encounter : weather inflight encounter other non adherence : far non adherence : clearance non adherence : published procedure other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
While on IFR flight through overcast and broken cloud decks, I encountered unrpted (by way of PIREPS and radar) severe up and downdrafts, with moderate to heavy rime ice. Attempted to request a reverse direction clearance and 180 degree turn on 2 occasions. Radio congestion made request difficult and unsuccessful. Subsequently executed a 180 degree turn to exit what appeared to be an embedded cell. Contacted ATC when out of severe turbulence and notified them of situation. No known conflict occurred, received new clearance and landed at daggett airport.
Original NASA ASRS Text
Title: UNAUTHORIZED UNCOORDINATED HDG TRACK CHANGE IN IMC CONDITIONS. DEV NON ADHERENCE TO ATC CLRNC.
Narrative: WHILE ON IFR FLT THROUGH OVCST AND BROKEN CLOUD DECKS, I ENCOUNTERED UNRPTED (BY WAY OF PIREPS AND RADAR) SEVERE UP AND DOWNDRAFTS, WITH MODERATE TO HVY RIME ICE. ATTEMPTED TO REQUEST A REVERSE DIRECTION CLRNC AND 180 DEG TURN ON 2 OCCASIONS. RADIO CONGESTION MADE REQUEST DIFFICULT AND UNSUCCESSFUL. SUBSEQUENTLY EXECUTED A 180 DEG TURN TO EXIT WHAT APPEARED TO BE AN EMBEDDED CELL. CONTACTED ATC WHEN OUT OF SEVERE TURB AND NOTIFIED THEM OF SITUATION. NO KNOWN CONFLICT OCCURRED, RECEIVED NEW CLRNC AND LANDED AT DAGGETT ARPT.
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.