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Air carrier flight crew reported an autopilot and glideslope anomaly during a visual approach to runway 28 at syr. This resulted in a descent well below the glideslope just inside the FAF. The autopilot was disengaged and the aircraft was returned to the now stable glideslope and a normal landing ensued.
| Attributes | |
| ACN | 1363701 |
| Time | |
| Date | 201606 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | SYR.Airport |
| State Reference | NY |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Large Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Route In Use | Visual Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Autopilot |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT |
Narrative:
We were on the visual approach to runway 28. We were level at 1600 MSL on an intercept heading to the FAF on the ILS approach. At the FAF; we heard an audible 'glide slope;' immediately followed by 'obstacle' GPWS annunciation. At that point; the autopilot descended below the glide path. I immediately turned off the autopilot and leveled the aircraft off until we recaptured the glide path both on instruments and verified by airfield PAPI's. We were in VMC throughout the approach and were able to continue approach visually.intercept final a mile or more prior to the FAF. Ruminate autopilot usage immediately after deviation anomaly is announced.
Original NASA ASRS Text
Title: Air carrier flight crew reported an autopilot and glideslope anomaly during a visual approach to Runway 28 at SYR. This resulted in a descent well below the glideslope just inside the FAF. The autopilot was disengaged and the aircraft was returned to the now stable glideslope and a normal landing ensued.
Narrative: We were on the visual approach to runway 28. We were level at 1600 MSL on an intercept heading to the FAF on the ILS approach. At the FAF; we heard an audible 'glide slope;' immediately followed by 'obstacle' GPWS annunciation. At that point; the autopilot descended below the glide path. I immediately turned off the autopilot and leveled the aircraft off until we recaptured the glide path both on instruments and verified by airfield PAPI's. We were in VMC throughout the approach and were able to continue approach visually.Intercept final a mile or more prior to the FAF. Ruminate autopilot usage immediately after deviation anomaly is announced.
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.