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A M20 pilot while enroute experiences a radio failure and in the process of trouble shooting unknowingly disconnected the autopilot resulting in an unusual attitude as well as various altitude deviations.
| Attributes | |
| ACN | 800932 |
| Time | |
| Date | 200808 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : zzz.vor |
| State Reference | US |
| Altitude | msl single value : 9000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | general aviation : personal |
| Make Model Name | M-20 J (201) |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Route In Use | enroute airway : zzz.airway |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : private |
| Experience | flight time last 90 days : 12 flight time total : 3267 flight time type : 2263 |
| ASRS Report | 800932 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : clearance other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : regained aircraft control |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
Narrative:
While en route sbound on vxx in IMC at 9000 ft MSL; I had a radio problem and was unable to transmit to ATC. While working to rectify the problem; I accidentally and unknowingly disconnected the autoplt. While concentrating on isolating the problem and then switching to another radio on the proper frequency; the aircraft entered an unusual attitude. In the process of recovering from the unusual attitude; significant altitude excursions and possible deviation from course were experienced. After the aircraft was brought under control on the assigned altitude and course; the autoplt was turned back on with no further altitude or course deviations. Using a different radio; no further communication problems were experienced.
Original NASA ASRS Text
Title: A M20 PLT WHILE ENROUTE EXPERIENCES A RADIO FAILURE AND IN THE PROCESS OF TROUBLE SHOOTING UNKNOWINGLY DISCONNECTED THE AUTOPILOT RESULTING IN AN UNUSUAL ATTITUDE AS WELL AS VARIOUS ALTITUDE DEVIATIONS.
Narrative: WHILE ENRTE SBOUND ON VXX IN IMC AT 9000 FT MSL; I HAD A RADIO PROB AND WAS UNABLE TO XMIT TO ATC. WHILE WORKING TO RECTIFY THE PROB; I ACCIDENTALLY AND UNKNOWINGLY DISCONNECTED THE AUTOPLT. WHILE CONCENTRATING ON ISOLATING THE PROB AND THEN SWITCHING TO ANOTHER RADIO ON THE PROPER FREQ; THE ACFT ENTERED AN UNUSUAL ATTITUDE. IN THE PROCESS OF RECOVERING FROM THE UNUSUAL ATTITUDE; SIGNIFICANT ALT EXCURSIONS AND POSSIBLE DEV FROM COURSE WERE EXPERIENCED. AFTER THE ACFT WAS BROUGHT UNDER CTL ON THE ASSIGNED ALT AND COURSE; THE AUTOPLT WAS TURNED BACK ON WITH NO FURTHER ALT OR COURSE DEVS. USING A DIFFERENT RADIO; NO FURTHER COM PROBS WERE EXPERIENCED.
Data retrieved from NASA's ASRS site as of May 2009 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.