Pilot on IFR flight has WX encounter, severe turbulence. Altitude deviation.

Attributes
ACN	159469
Time
Date	199010
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : cmk
State Reference	NY
Altitude	msl bound lower : 6000 msl bound upper : 7000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	cruise other
Route In Use	enroute airway : zbw
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
ASRS Report	159469
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Weather
Air Traffic Incident	Pilot Deviation

Narrative:

Heading northwest on V39 from carmel VOR to soars intersection. We were in solid IFR at 7000' with moderate turbulence and altitude was fluctuating several hundred ft. We turned north on V39 at soars, the aircraft immediately encountered more turbulence and we lost over 1000' of altitude and picked up airspeed. Corrective action was power back, level wings, level pitch attitude, cycle autoplt, full power. After airspeed decreased out of yellow arc and climb back to 7000', the assigned altitude. Center contacted me by the time I was back to 6300'. We continued to climb back to 7000'. We were using a flight director. The turn was too tight and due to the turbulence we lost altitude almost immediately. A shallower bank angle would have minimized the problem along with a better can of the INS. Turbulence was not reported for that time. Also I believe that ATC unnecessarily gave us a route of flight that zig-zagged us on our IFR flight from teb to alb. It was not as filed, plus we had 1 change en route.

Original NASA ASRS Text

Title: PLT ON IFR FLT HAS WX ENCOUNTER, SEVERE TURBULENCE. ALT DEVIATION.

Narrative: HDG NW ON V39 FROM CARMEL VOR TO SOARS INTXN. WE WERE IN SOLID IFR AT 7000' WITH MODERATE TURB AND ALT WAS FLUCTUATING SEVERAL HUNDRED FT. WE TURNED N ON V39 AT SOARS, THE ACFT IMMEDIATELY ENCOUNTERED MORE TURB AND WE LOST OVER 1000' OF ALT AND PICKED UP AIRSPD. CORRECTIVE ACTION WAS PWR BACK, LEVEL WINGS, LEVEL PITCH ATTITUDE, CYCLE AUTOPLT, FULL PWR. AFTER AIRSPD DECREASED OUT OF YELLOW ARC AND CLB BACK TO 7000', THE ASSIGNED ALT. CENTER CONTACTED ME BY THE TIME I WAS BACK TO 6300'. WE CONTINUED TO CLB BACK TO 7000'. WE WERE USING A FLT DIRECTOR. THE TURN WAS TOO TIGHT AND DUE TO THE TURB WE LOST ALT ALMOST IMMEDIATELY. A SHALLOWER BANK ANGLE WOULD HAVE MINIMIZED THE PROB ALONG WITH A BETTER CAN OF THE INS. TURB WAS NOT RPTED FOR THAT TIME. ALSO I BELIEVE THAT ATC UNNECESSARILY GAVE US A RTE OF FLT THAT ZIG-ZAGGED US ON OUR IFR FLT FROM TEB TO ALB. IT WAS NOT AS FILED, PLUS WE HAD 1 CHANGE ENRTE.

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.