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A B727 flight crew allows the aircraft, on autoplt, to descend over 500 ft past their assigned altitude when 30 mi southwest of lga.
| Attributes | |
| ACN | 486510 |
| Time | |
| Date | 200009 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : lga.airport |
| State Reference | NY |
| Altitude | msl bound lower : 6450 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | Mixed |
| Weather Elements | Rain |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 04 other vortac |
| Flight Phase | descent : vacating altitude |
| Route In Use | approach : instrument precision arrival star : minks |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi pilot : commercial pilot : flight engineer pilot : instrument pilot : multi engine |
| Experience | flight time last 90 days : 60 flight time total : 10000 flight time type : 3500 |
| ASRS Report | 486510 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : flight engineer pilot : cfi pilot : atp |
| ASRS Report | 486804 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance non adherence : company policies other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : became reoriented flight crew : returned to assigned altitude |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Captain was flying the aircraft on the autoplt and descending from 9000 ft MSL to cleared altitude of 7000 ft MSL. I (F0) was setting up the navigation radios for ILS runway 4 at lga when I saw the altitude descending through 6500 ft. The captain then made an immediate correction back up to 7000 ft. We did not see any other aircraft around and no TCASII or remarks from ATC. The crew had been on duty since XA30, and I think a long day in IMC WX slowed down our response time. Supplemental information from acn 486804: I heard the first officer say 'level off' twice and looked forward to see the aircraft descending through approximately 6700 ft with the altitude alerter set at 7000 ft. Minimum altitude was approximately 6450 ft.
Original NASA ASRS Text
Title: A B727 FLC ALLOWS THE ACFT, ON AUTOPLT, TO DSND OVER 500 FT PAST THEIR ASSIGNED ALT WHEN 30 MI SW OF LGA.
Narrative: CAPT WAS FLYING THE ACFT ON THE AUTOPLT AND DSNDING FROM 9000 FT MSL TO CLRED ALT OF 7000 FT MSL. I (F0) WAS SETTING UP THE NAV RADIOS FOR ILS RWY 4 AT LGA WHEN I SAW THE ALT DSNDING THROUGH 6500 FT. THE CAPT THEN MADE AN IMMEDIATE CORRECTION BACK UP TO 7000 FT. WE DID NOT SEE ANY OTHER ACFT AROUND AND NO TCASII OR REMARKS FROM ATC. THE CREW HAD BEEN ON DUTY SINCE XA30, AND I THINK A LONG DAY IN IMC WX SLOWED DOWN OUR RESPONSE TIME. SUPPLEMENTAL INFO FROM ACN 486804: I HEARD THE FO SAY 'LEVEL OFF' TWICE AND LOOKED FORWARD TO SEE THE ACFT DSNDING THROUGH APPROX 6700 FT WITH THE ALT ALERTER SET AT 7000 FT. MINIMUM ALT WAS APPROX 6450 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.