 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Altitude crossing restr -- air carrier confuses 10 east with 10 west and is too high at the crossing point.
| Attributes | |
| ACN | 313580 |
| Time | |
| Date | 199508 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : fjc |
| State Reference | PA |
| Altitude | msl bound lower : 11000 msl bound upper : 14500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny artcc : zfw |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 30 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 10000 flight time type : 3000 |
| ASRS Report | 313580 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| ASRS Report | 312698 |
| Events | |
| Anomaly | altitude deviation : undershoot altitude deviation : crossing restriction not met non adherence : clearance other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course none taken : insufficient time other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Aircraft eastbound on milton 8 arrival to lga. The problem arose with a misunderstanding of the clearance by the flight crew. The PNF was working the radios and responded to an ATC request to cross 10 NM west of the fjc for at 11000 ft. The PF understood the clearance to be 10 NM east of the VOR, and understood the PNF readback of the clearance to be 10 NM east. The discrepancy became known to the crew when ATC asked if we would make our crossing restr west of the VOR. A rapid descent rate was immediately initiated to approximately 3500 FPM while the misunderstanding was discussed by the cockpit crew. I recalled the controller saying we were now at the 5 NM DME just immediately prior to the PNF reporting us level at the assigned altitude. No further comment from ATC was made referencing the crossing restr. For a crossing restr, both ATC and the PNF must monitor the aircraft's climb or descent to assure timely compliance of a clearance in the event of a misunderstanding by the PF.
Original NASA ASRS Text
Title: ALT XING RESTR -- ACR CONFUSES 10 E WITH 10 W AND IS TOO HIGH AT THE XING POINT.
Narrative: ACFT EBOUND ON MILTON 8 ARR TO LGA. THE PROB AROSE WITH A MISUNDERSTANDING OF THE CLRNC BY THE FLC. THE PNF WAS WORKING THE RADIOS AND RESPONDED TO AN ATC REQUEST TO CROSS 10 NM W OF THE FJC FOR AT 11000 FT. THE PF UNDERSTOOD THE CLRNC TO BE 10 NM E OF THE VOR, AND UNDERSTOOD THE PNF READBACK OF THE CLRNC TO BE 10 NM E. THE DISCREPANCY BECAME KNOWN TO THE CREW WHEN ATC ASKED IF WE WOULD MAKE OUR XING RESTR W OF THE VOR. A RAPID DSCNT RATE WAS IMMEDIATELY INITIATED TO APPROX 3500 FPM WHILE THE MISUNDERSTANDING WAS DISCUSSED BY THE COCKPIT CREW. I RECALLED THE CTLR SAYING WE WERE NOW AT THE 5 NM DME JUST IMMEDIATELY PRIOR TO THE PNF RPTING US LEVEL AT THE ASSIGNED ALT. NO FURTHER COMMENT FROM ATC WAS MADE REFING THE XING RESTR. FOR A XING RESTR, BOTH ATC AND THE PNF MUST MONITOR THE ACFT'S CLB OR DSCNT TO ASSURE TIMELY COMPLIANCE OF A CLRNC IN THE EVENT OF A MISUNDERSTANDING BY THE PF.
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.