|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||atc facility : tph|
|Altitude||msl bound lower : 12600|
msl bound upper : 13400
|Controlling Facilities||artcc : zoa|
|Operator||general aviation : personal|
|Make Model Name||Small Aircraft, Low Wing, 1 Eng, Retractable Gear|
|Flight Phase||cruise other|
|Function||flight crew : single pilot|
|Qualification||pilot : private|
|Experience||flight time last 90 days : 75|
flight time total : 200
|Anomaly||altitude deviation : excursion from assigned altitude|
inflight encounter : weather
non adherence : clearance
other anomaly other
other spatial deviation
|Independent Detector||other controllera|
|Resolutory Action||none taken : unable|
none taken : anomaly accepted
|Consequence||faa : investigated|
faa : reviewed incident with flight crew
|Primary Problem||Flight Crew Human Performance|
|Air Traffic Incident||Pilot Deviation|
I have been notified that an investigation is being initialed concerning 2 matters associated with this flight. One is of no concern. However, 2 others are collectively referred to as 'deviations from far's.' I was flying under VFR conditions from sac to las, when I encountered moderate to severe up and down drafts over the sierras. I made an attempt to make a PIREP. I could not hold altitude to within 100' of my assigned altitude. I felt that it was safer for me to concentrate on level attitude and maintain altitude to within about 400', which was possible. Later I encountered an additional impediment--2 thunderheads directly in my path. I notified center of this and requested deviation to the right of course. They instructed me to climb to 15000'. I was not able to comply as I was at maximum power and climb airspeed and losing 200-500 FPM. As I got within about 1 mi of the cumulus clouds I deviated to the right of course and asked for vectors for the nearest clear airport. Upon landing in tph I was informed that I had numerous deviations from far's and would have to answer to FAA. I feel the deviations were needed due to conditions and I acted in the interest of safety for myself and the plane.
Original NASA ASRS Text
Title: GA SMA ALT DEVIATION EXCURSION FROM CLRNC ALT AND DEVIATION FROM CLRNC ROUTE.
Narrative: I HAVE BEEN NOTIFIED THAT AN INVESTIGATION IS BEING INITIALED CONCERNING 2 MATTERS ASSOCIATED WITH THIS FLT. ONE IS OF NO CONCERN. HOWEVER, 2 OTHERS ARE COLLECTIVELY REFERRED TO AS 'DEVIATIONS FROM FAR'S.' I WAS FLYING UNDER VFR CONDITIONS FROM SAC TO LAS, WHEN I ENCOUNTERED MODERATE TO SEVERE UP AND DOWN DRAFTS OVER THE SIERRAS. I MADE AN ATTEMPT TO MAKE A PIREP. I COULD NOT HOLD ALT TO WITHIN 100' OF MY ASSIGNED ALT. I FELT THAT IT WAS SAFER FOR ME TO CONCENTRATE ON LEVEL ATTITUDE AND MAINTAIN ALT TO WITHIN ABOUT 400', WHICH WAS POSSIBLE. LATER I ENCOUNTERED AN ADDITIONAL IMPEDIMENT--2 THUNDERHEADS DIRECTLY IN MY PATH. I NOTIFIED CENTER OF THIS AND REQUESTED DEVIATION TO THE RIGHT OF COURSE. THEY INSTRUCTED ME TO CLB TO 15000'. I WAS NOT ABLE TO COMPLY AS I WAS AT MAX PWR AND CLB AIRSPD AND LOSING 200-500 FPM. AS I GOT WITHIN ABOUT 1 MI OF THE CUMULUS CLOUDS I DEVIATED TO THE RIGHT OF COURSE AND ASKED FOR VECTORS FOR THE NEAREST CLEAR ARPT. UPON LNDG IN TPH I WAS INFORMED THAT I HAD NUMEROUS DEVIATIONS FROM FAR'S AND WOULD HAVE TO ANSWER TO FAA. I FEEL THE DEVIATIONS WERE NEEDED DUE TO CONDITIONS AND I ACTED IN THE INTEREST OF SAFETY FOR MYSELF AND THE PLANE.
Data retrieved from NASA's ASRS site as of August 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.