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A320 captain reported an issue with the FMS which did not comply with altitude restrictions during an ILS approach.
| Attributes | |
| ACN | 1487592 |
| Time | |
| Date | 201710 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | SCT.TRACON |
| State Reference | CA |
| Aircraft 1 | |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | FMS/FMC |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Altitude Crossing Restriction Not Met Deviation - Procedural Published Material / Policy |
Narrative:
I have experienced the airplane not recognizing the 3;600 ft crossing restriction at hunda the last two arrivals into lax runway 25L both times the airplanes were with honeywell mcdus. The airplane was in des/navigation mode while pressing the appr after passing hunda so that G/south would not be captured. Each time the airplane ignored the restriction; crossing hunda at 3;550 ft the first time and 3;540 ft the second time. I also noticed we were on the glide slope at hunda which defeats the purpose.I don't see anything in the aip pages except not to arm the approach until after hunda. Is this a problem with the airplane or how I'm flying the approach?
Original NASA ASRS Text
Title: A320 Captain reported an issue with the FMS which did not comply with altitude restrictions during an ILS approach.
Narrative: I have experienced the airplane not recognizing the 3;600 FT crossing restriction at HUNDA the last two arrivals into LAX runway 25L both times the airplanes were with Honeywell MCDUs. The airplane was in DES/NAV mode while pressing the APPR after passing HUNDA so that G/S would not be captured. Each time the airplane ignored the restriction; crossing HUNDA at 3;550 FT the first time and 3;540 FT the second time. I also noticed we were on the glide slope at HUNDA which defeats the purpose.I don't see anything in the AIP pages except not to arm the approach until after HUNDA. Is this a problem with the airplane or how I'm flying the approach?
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.