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The pilot of a piper aerostar reported an autopilot problem on approach that resulted in a descent below the glideslope before receiving an alert by ATC.
| Attributes | |
| ACN | 1349469 |
| Time | |
| Date | 201604 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Light | Dawn |
| Aircraft 1 | |
| Make Model Name | PA-60 700P |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Final Approach |
| Route In Use | Other ILS |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Autopilot |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Flight Instructor Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 30 Flight Crew Total 2400 Flight Crew Type 60 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Altitude Overshoot Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT |
Narrative:
Had a problem with my autopilot; received a warning from ATC and the tower and I ended up significantly below the glide slope on my first approach before I made appropriate corrections. I did a go around and completed the second approach manually without incident.I will be working with an avionics expert to determine the cause. In the future I need to be more diligent monitoring the autopilot activity and monitoring the glideslope and making faster manual corrections as needed.
Original NASA ASRS Text
Title: The pilot of a Piper Aerostar reported an autopilot problem on approach that resulted in a descent below the glideslope before receiving an alert by ATC.
Narrative: Had a problem with my autopilot; received a warning from ATC and the tower and I ended up significantly below the glide slope on my first approach before I made appropriate corrections. I did a go around and completed the second approach manually without incident.I will be working with an avionics expert to determine the cause. In the future I need to be more diligent monitoring the autopilot activity and monitoring the glideslope and making faster manual corrections as needed.
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.