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An ATP rated pilot flying a C175 to new mexico encounters mountain wave activity and turbulence resulting in an excursion from assigned altitude.
| Attributes | |
| ACN | 439878 |
| Time | |
| Date | 199906 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zab.artcc |
| State Reference | NM |
| Altitude | msl single value : 9000 |
| Environment | |
| Flight Conditions | VMC |
| Weather Elements | Turbulence |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla.artcc |
| Operator | general aviation : personal |
| Make Model Name | Skylark 175 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level |
| Route In Use | enroute airway : v94.airway |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 18 flight time total : 2145 flight time type : 1000 |
| ASRS Report | 439878 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : turbulence non adherence : clearance other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : provided flight assist flight crew : regained aircraft control flight crew : returned to assigned altitude |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Weather |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On a flight from eloy, az, to deming, NM, on V94 between stanfield VOR and san simon VOR on the eastern half of that section I believe I encountered both mountain wave and violent thermal activity. The rate of altitude change was unbelievable, far exceeding the capability of my cessna skylark 175 to maintain altitude. As a result I was requested to contact the FAA upon arrival at deming, NM. I did so and spoke with the watch supervisor. During our discussion he informed me that after my incident(south) other pilots reported large up/down drafts in that area.
Original NASA ASRS Text
Title: AN ATP RATED PLT FLYING A C175 TO NEW MEXICO ENCOUNTERS MOUNTAIN WAVE ACTIVITY AND TURB RESULTING IN AN EXCURSION FROM ASSIGNED ALT.
Narrative: ON A FLT FROM ELOY, AZ, TO DEMING, NM, ON V94 BTWN STANFIELD VOR AND SAN SIMON VOR ON THE EASTERN HALF OF THAT SECTION I BELIEVE I ENCOUNTERED BOTH MOUNTAIN WAVE AND VIOLENT THERMAL ACTIVITY. THE RATE OF ALT CHANGE WAS UNBELIEVABLE, FAR EXCEEDING THE CAPABILITY OF MY CESSNA SKYLARK 175 TO MAINTAIN ALT. AS A RESULT I WAS REQUESTED TO CONTACT THE FAA UPON ARR AT DEMING, NM. I DID SO AND SPOKE WITH THE WATCH SUPVR. DURING OUR DISCUSSION HE INFORMED ME THAT AFTER MY INCIDENT(S) OTHER PLTS RPTED LARGE UP/DOWN DRAFTS IN THAT AREA.
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.