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MD11 flight crew reports low altitude alert from the tower during an ILS runway 22L with glideslope out at jfk. The crew had descended to MDA (460) one mile prior to the vdp using vertical speed rather than a profile approach; due to FMC restrictions. No action is taken by the crew and a normal landing ensues.
| Attributes | |
| ACN | 1061177 |
| Time | |
| Date | 201301 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | JFK.Airport |
| State Reference | NY |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | MD-11 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Inflight Event / Encounter CFTT / CFIT |
Narrative:
Cleared ILS 22L glideslope out of service approach. First officer flying monitored approach. ATIS reported 600 foot ceiling. Because of recent database change; approach was flown fcp to MDA. First officer flew fully configured; on speed; stable approach from FAF (1;800 MSL) to localizer MDA of 460 MSL; arriving at MDA approximately 1 mile prior to vdp. Inbound to vdp; tower called low level altitude alert. We checked and verified current barometric altitude at 460 MSL and correct altimeter setting. Rogered tower and continued approach to vdp to uneventful landing. Fcp to MDA procedures resulted in level off at MDA earlier than a prof to MDA approach. This may have resulted in the momentary low level altitude alert. Recommend update FMS database as soon as possible to allow for prof to MDA approaches vs fcp procedures.
Original NASA ASRS Text
Title: MD11 flight crew reports low altitude alert from the Tower during an ILS Runway 22L with glideslope out at JFK. The crew had descended to MDA (460) one mile prior to the VDP using vertical speed rather than a profile approach; due to FMC restrictions. No action is taken by the crew and a normal landing ensues.
Narrative: Cleared ILS 22L glideslope out of service approach. First Officer flying monitored approach. ATIS reported 600 foot ceiling. Because of recent database change; approach was flown FCP to MDA. First Officer flew fully configured; on speed; stable approach from FAF (1;800 MSL) to LOC MDA of 460 MSL; arriving at MDA approximately 1 mile prior to VDP. Inbound to VDP; Tower called low level altitude alert. We checked and verified current barometric altitude at 460 MSL and correct altimeter setting. Rogered Tower and continued approach to VDP to uneventful landing. FCP to MDA procedures resulted in level off at MDA earlier than a PROF to MDA approach. This may have resulted in the momentary low level altitude alert. Recommend update FMS database ASAP to allow for PROF to MDA approaches Vs FCP procedures.
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.