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A B737-400 flight crew misunderstands their altitude crossing restr and crosses 30 mi west of lrp at 13000 ft instead of the requested 17000 ft, ZNY, ny.
| Attributes | |
| ACN | 455700 |
| Time | |
| Date | 199911 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : lrp.vortac |
| State Reference | PA |
| Altitude | msl bound lower : 13000 msl bound upper : 17000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny.artcc tracon : s46.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | descent : approach descent : intermediate altitude |
| Route In Use | arrival star : bunts 1 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 50 flight time total : 8000 flight time type : 6000 |
| ASRS Report | 455700 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : flight engineer pilot : commercial pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 180 flight time total : 12000 flight time type : 8000 |
| ASRS Report | 455706 |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued advisory none taken : anomaly accepted none taken : detected after the fact |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
In descent to phl, given a clearance to cross 30 mi west lrp at (what we think) was 13000 ft. At 13000 ft while level, controller asked us to confirm that we were level at 17000 ft. We both thought that we were cleared to 13000 ft, and I believe that I read back '30 mi west at 13000 ft.' controller said that there was no conflict.
Original NASA ASRS Text
Title: A B737-400 FLC MISUNDERSTANDS THEIR ALT XING RESTR AND CROSSES 30 MI W OF LRP AT 13000 FT INSTEAD OF THE REQUESTED 17000 FT, ZNY, NY.
Narrative: IN DSCNT TO PHL, GIVEN A CLRNC TO CROSS 30 MI W LRP AT (WHAT WE THINK) WAS 13000 FT. AT 13000 FT WHILE LEVEL, CTLR ASKED US TO CONFIRM THAT WE WERE LEVEL AT 17000 FT. WE BOTH THOUGHT THAT WE WERE CLRED TO 13000 FT, AND I BELIEVE THAT I READ BACK '30 MI W AT 13000 FT.' CTLR SAID THAT THERE WAS NO CONFLICT.
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.