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Private pilot of a paro-181 deviated from assigned cruise altitude due to turbulence in IMC conditions resulting in ATC intervention and change of altitude assignment.
| Attributes | |
| ACN | 336570 |
| Time | |
| Date | 199605 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : lex |
| State Reference | KY |
| Altitude | msl bound lower : 9000 msl bound upper : 10500 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lex |
| Operator | general aviation : personal |
| Make Model Name | PA-28 Cherokee Arrow IV |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : private |
| Experience | flight time last 90 days : 20 flight time total : 550 flight time type : 170 |
| ASRS Report | 336570 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During cruise flight in turbulent cumulus clouds the aircraft in 2 instances exceeded the assigned ATC altitude. While at 9000 ft I requested 10000 ft, when the aircraft was taken to about 9400 ft. ATC noted the excursion, but assigned 10000 ft. Still in the clouds and turbulence I requested 11000 ft, and an altitude of about 10500 ft was being developed. ATC admonished me for the altitude excursion, but did not approve 11000 ft. Upon handoff to ZID 11000 ft was approved, and no further altitude problems were experienced.
Original NASA ASRS Text
Title: PVT PLT OF A PARO-181 DEVIATED FROM ASSIGNED CRUISE ALT DUE TO TURB IN IMC CONDITIONS RESULTING IN ATC INTERVENTION AND CHANGE OF ALT ASSIGNMENT.
Narrative: DURING CRUISE FLT IN TURBULENT CUMULUS CLOUDS THE ACFT IN 2 INSTANCES EXCEEDED THE ASSIGNED ATC ALT. WHILE AT 9000 FT I REQUESTED 10000 FT, WHEN THE ACFT WAS TAKEN TO ABOUT 9400 FT. ATC NOTED THE EXCURSION, BUT ASSIGNED 10000 FT. STILL IN THE CLOUDS AND TURB I REQUESTED 11000 FT, AND AN ALT OF ABOUT 10500 FT WAS BEING DEVELOPED. ATC ADMONISHED ME FOR THE ALT EXCURSION, BUT DID NOT APPROVE 11000 FT. UPON HDOF TO ZID 11000 FT WAS APPROVED, AND NO FURTHER ALT PROBS WERE EXPERIENCED.
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.