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SR22T pilot reported heading and altitude deviations associated with loss of control during troubleshooting of a GPS problem.
| Attributes | |
| ACN | 1291871 |
| Time | |
| Date | 201508 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | GRB.TRACON |
| State Reference | WI |
| Aircraft 1 | |
| Make Model Name | SR22 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Route In Use | Direct |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | GPS & Other Satellite Navigation |
| Person 1 | |
| Function | Pilot Flying Single Pilot |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Commercial Flight Crew Flight Instructor |
| Experience | Flight Crew Last 90 Days 12 Flight Crew Total 1700 Flight Crew Type 300 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance Deviation - Track / Heading All Types Inflight Event / Encounter Loss Of Aircraft Control |
Narrative:
Error message indicating loss of number 1 GPS connection. Auto select back-up GPS number 2 (loss degrades approach capability). While trouble shooting the error inadvertently pulled the ahrs (air heading reference system) breaker and lost primary flight display (pfd) altitude; heading and attitude indicator.distracted by the loss of information and still trying to trouble shoot the GPS failure and in solid IFR conditions there was a brief loss of control. The aircraft lost over 1;000 feet and 90 degrees of heading before I recognized the problem and using back-up instruments began correcting. The entire episode lasted about 2 minutes.I contacted ATC as soon as I recognized the loss of control but the controller misunderstood and thought I was asking for a new routing? Eventually we reinstated our fight plan clearance.
Original NASA ASRS Text
Title: SR22T pilot reported heading and altitude deviations associated with loss of control during troubleshooting of a GPS problem.
Narrative: Error message indicating loss of Number 1 GPS connection. Auto select back-up GPS Number 2 (loss degrades approach capability). While trouble shooting the error inadvertently pulled the AHRS (Air Heading Reference System) breaker and lost Primary Flight Display (PFD) altitude; heading and attitude indicator.Distracted by the loss of information and still trying to trouble shoot the GPS failure and in solid IFR conditions there was a brief loss of control. The aircraft lost over 1;000 feet and 90 degrees of heading before I recognized the problem and using back-up instruments began correcting. The entire episode lasted about 2 minutes.I contacted ATC as soon as I recognized the loss of control but the controller misunderstood and thought I was asking for a new routing? Eventually we reinstated our fight plan clearance.
Data retrieved from NASA's ASRS site 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.