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B747 crew receives low altitude alert from tower after descending below procedure altitude on approach to jfk.
| Attributes | |
| ACN | 428170 |
| Time | |
| Date | 199902 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : cri.vor |
| State Reference | NY |
| Altitude | msl bound lower : 1200 msl bound upper : 1500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : jfk.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B747-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | descent : intermediate altitude |
| Route In Use | approach : charted visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 80 flight time total : 8000 flight time type : 1500 |
| ASRS Report | 428170 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : published procedure non adherence : clearance other spatial deviation |
| Independent Detector | atc equipment : msaw other controllera |
| Resolutory Action | controller : issued alert flight crew : overrode automation flight crew : returned to original clearance |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Captain flying VOR runway 13L approach into jfk. I was monitoring approach and working radios. ATC cleared us for approach and switched us to tower local controller. Captain using autoplt and LNAV vertical speed 700 FPM descent from 3000 ft down to 1500 ft mandatory crossing at canarsie VOR. Prior to altitude capture, he instructed me to set 1100 ft in MCP, which I did. Aircraft descended to approximately 1200 ft over canarsie and tower controller issued 'low altitude alert.' captain took manual control of aircraft and climbed back to 1500 ft.
Original NASA ASRS Text
Title: B747 CREW RECEIVES LOW ALT ALERT FROM TWR AFTER DSNDING BELOW PROC ALT ON APCH TO JFK.
Narrative: CAPT FLYING VOR RWY 13L APCH INTO JFK. I WAS MONITORING APCH AND WORKING RADIOS. ATC CLRED US FOR APCH AND SWITCHED US TO TWR LCL CTLR. CAPT USING AUTOPLT AND LNAV VERT SPD 700 FPM DSCNT FROM 3000 FT DOWN TO 1500 FT MANDATORY XING AT CANARSIE VOR. PRIOR TO ALT CAPTURE, HE INSTRUCTED ME TO SET 1100 FT IN MCP, WHICH I DID. ACFT DSNDED TO APPROX 1200 FT OVER CANARSIE AND TWR CTLR ISSUED 'LOW ALT ALERT.' CAPT TOOK MANUAL CTL OF ACFT AND CLBED BACK TO 1500 FT.
Data retrieved from NASA's ASRS site as of July 2007 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.