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B777 captain reported a glideslope warning on final approach and continued using the VASI.
| Attributes | |
| ACN | 1609736 |
| Time | |
| Date | 201901 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZZ.Airport |
| State Reference | FO |
| Aircraft 1 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | ILS/VOR |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Inflight Event / Encounter Unstabilized Approach |
Narrative:
ZZZZ; weather via ATIS was VFR. Runway xxl closed for maintenance/construction. Glideslope fluctuations occurring runway xxr. Crew discussed the cautions of flying into ZZZZ. Terrain; approach speeds; missed approach procedures for single and two engine and variable wind due to terrain. All crew members had been to ZZZZ many times before. Cleared for ILS xxr starting at 2000 feet 2 miles from FAF. Aircraft was configured gear down; flaps 25; speed 160 knots and autopilot on. I noted an amber autopilot on EICAS to first officer (first officer) who was flying the approach. When I looked at the primary flight display; the green GS on FMA had an amber bar drawn across it. Flight director had turned amber with full down deflection on it. I instructed the first officer to maintain altitude. The [relief pilot] confirmed and repeated it to first officer. Autopilot was disconnected. First officer asked for FD (flight director) to be turned off. Flaps 30 selected. Approach continued with visual using VASI bars. Before landing checklist completed. Aircraft was in normal landing profile at 500 feet. Landed in the tdze (touchdown zone). The first officers; (all former captains) and I with 100 plus years experience had not seen this event before. This might be a good training scenario.
Original NASA ASRS Text
Title: B777 Captain reported a glideslope warning on final approach and continued using the VASI.
Narrative: ZZZZ; weather via ATIS was VFR. RWY XXL closed for maintenance/construction. Glideslope fluctuations occurring RWY XXR. Crew discussed the cautions of flying into ZZZZ. Terrain; Approach speeds; missed approach procedures for single and two engine and variable wind due to terrain. All crew members had been to ZZZZ many times before. Cleared for ILS XXR starting at 2000 feet 2 miles from FAF. Aircraft was configured gear down; flaps 25; speed 160 knots and autopilot on. I noted an amber AUTOPILOT on EICAS to FO (First Officer) who was flying the approach. When I looked at the Primary Flight Display; the green GS on FMA had an amber bar drawn across it. Flight Director had turned amber with full down deflection on it. I instructed the FO to maintain altitude. The [Relief Pilot] confirmed and repeated it to FO. Autopilot was disconnected. FO asked for FD (Flight Director) to be turned off. Flaps 30 selected. Approach continued with visual using VASI bars. Before Landing Checklist completed. Aircraft was in normal landing profile at 500 feet. Landed in the TDZE (touchdown zone). The First Officers; (all former Captains) and I with 100 plus years experience had not seen this event before. This might be a good training scenario.
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.