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Air carrier flight crew reports capturing a false glideslope during a visual ILS to runway 10 at mtpp. Descending through 3;000 ft with the autopilot engaged; the glideslope suddenly showed low and the autopilot pitched up to maintain the new glideslope. Approach is continued manually to a normal landing.
| Attributes | |
| ACN | 1031520 |
| Time | |
| Date | 201208 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | MTPP.Airport |
| State Reference | FO |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | ILS/VOR |
| Person 1 | |
| Function | Pilot Not Flying First Officer |
| Experience | Flight Crew Last 90 Days 50 Flight Crew Total 10000 Flight Crew Type 7000 |
| Person 2 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 210 |
| Events | |
| Anomaly | ATC Issue All Types Aircraft Equipment Problem Less Severe Inflight Event / Encounter Unstabilized Approach |
Narrative:
On approach to runway 10 at mtpp; we got false glideslope information with the autopilot engaged. Localizer and glideslope were captured. The localizer had also been properly identified. We were descending through approximately 3;000 ft on the glideslope when the downslope all of a sudden showed us low. The aircraft pitched up to maintain glideslope. The captain; who was the flying pilot; disconnected the autopilot and we continued the approach visually to an uneventful landing.
Original NASA ASRS Text
Title: Air Carrier flight crew reports capturing a false glideslope during a visual ILS to Runway 10 at MTPP. Descending through 3;000 FT with the autopilot engaged; the glideslope suddenly showed low and the autopilot pitched up to maintain the new glideslope. Approach is continued manually to a normal landing.
Narrative: On approach to Runway 10 at MTPP; we got false glideslope information with the autopilot engaged. Localizer and glideslope were captured. The localizer had also been properly identified. We were descending through approximately 3;000 FT on the glideslope when the downslope all of a sudden showed us low. The aircraft pitched up to maintain glideslope. The Captain; who was the flying pilot; disconnected the autopilot and we continued the approach visually to an uneventful landing.
Data retrieved from NASA's ASRS site as of July 2013 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.