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B767 flight crew reported that the aircraft descended below GS intercept altitude; EICAS message indicated a glideslope problem; the autopilot was disconnected; and a stabilized approach was completed manually. After landing; an IRS EICAS message was received.
| Attributes | |
| ACN | 1485859 |
| Time | |
| Date | 201710 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | HNL.Airport |
| State Reference | HI |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | ILS/VOR |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | First Officer Pilot Flying |
| 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 |
Narrative:
Phnl pilot monitoring; weather: scattered clouds 10 miles visibility. Cleared for ILS 08L phnl; 3000 ft until established. Upon localizer; capture approach mode selected on fmp (flight management panel).aircraft intercepted and descended on the glideslope in visual conditions with runway in sight. 'Autopilot' EICAS message annunciator with amber line through glideslope mode annunciator on captain and first officer pfd (primary flight display). When fluctuating ILS indications displayed; autopilot was disconnected and ILS indications returned to normal and stabilized approach completed.aircraft had descended to approximately 2300-2400 ft MSL prior to [fgtre] fix which has a 2700 ft glideslope intercept altitude. ATC did not query our altitude. After landing; left IRS fault EICAS message displayed. Autopilot EICAS message and fluctuating ILS indication and left IRS fault entered in [the logbook] after gate arrival.I think the degraded condition with the engaged autopilot in the approach mode caused the aircraft to descend below glide path. Reinforces the importance of monitoring the automation and flight path to verify the aircraft is performing to the level of automation selected.
Original NASA ASRS Text
Title: B767 flight crew reported that the aircraft descended below GS intercept altitude; EICAS message indicated a glideslope problem; the autopilot was disconnected; and a stabilized approach was completed manually. After landing; an IRS EICAS message was received.
Narrative: PHNL Pilot Monitoring; Weather: scattered clouds 10 miles visibility. Cleared for ILS 08L PHNL; 3000 FT until established. Upon LOC; capture Approach mode selected on FMP (Flight Management Panel).Aircraft intercepted and descended on the glideslope in visual conditions with runway in sight. 'Autopilot' EICAS message Annunciator with amber line through glideslope mode annunciator on Captain and First Officer PFD (Primary Flight Display). When fluctuating ILS indications displayed; autopilot was disconnected and ILS indications returned to normal and stabilized approach completed.Aircraft had descended to approximately 2300-2400 FT MSL prior to [FGTRE] fix which has a 2700 FT glideslope intercept altitude. ATC did not query our altitude. After landing; Left IRS fault EICAS message displayed. Autopilot EICAS message and fluctuating ILS indication and Left IRS fault entered in [the logbook] after gate arrival.I think the degraded condition with the engaged Autopilot in the Approach mode caused the aircraft to descend below glide path. Reinforces the importance of monitoring the automation and flight path to verify the aircraft is performing to the level of automation selected.
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.