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Air carrier B737 flight crew attempt to communicate with ZTL that they are unable to meet assigned STAR crossing restr. Due to frequency congestion, ATC notification is not timely. Additionally, there is confusion on reassigned altitude readback, causing further ATC concern.
| Attributes | |
| ACN | 410640 |
| Time | |
| Date | 199808 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : lyh |
| State Reference | VA |
| Altitude | msl bound lower : 22000 msl bound upper : 22000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| 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 : atp pilot : instrument pilot : flight engineer pilot : commercial |
| Experience | flight time last 90 days : 220 flight time total : 15000 flight time type : 7000 |
| ASRS Report | 410640 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met non adherence : clearance |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Cruising at FL260, we were given 'cross mayos intersection at FL220.' we set up for a manual descent and started down. We knew it would be close. We asked ZTL for relief on the crossing point, but he was busy talking. He finally asked us if we were going to mayos intersection at FL220. We said no, but we can turn. He came back with descend to FL200. We read back FL200 and he came back with descend to FL220! We missed the restr by several mi. ATC frequencys were busy and we had difficulty getting through. Miscom at a critical phase of flight.
Original NASA ASRS Text
Title: ACR B737 FLC ATTEMPT TO COMMUNICATE WITH ZTL THAT THEY ARE UNABLE TO MEET ASSIGNED STAR XING RESTR. DUE TO FREQ CONGESTION, ATC NOTIFICATION IS NOT TIMELY. ADDITIONALLY, THERE IS CONFUSION ON REASSIGNED ALT READBACK, CAUSING FURTHER ATC CONCERN.
Narrative: CRUISING AT FL260, WE WERE GIVEN 'CROSS MAYOS INTXN AT FL220.' WE SET UP FOR A MANUAL DSCNT AND STARTED DOWN. WE KNEW IT WOULD BE CLOSE. WE ASKED ZTL FOR RELIEF ON THE XING POINT, BUT HE WAS BUSY TALKING. HE FINALLY ASKED US IF WE WERE GOING TO MAYOS INTXN AT FL220. WE SAID NO, BUT WE CAN TURN. HE CAME BACK WITH DSND TO FL200. WE READ BACK FL200 AND HE CAME BACK WITH DSND TO FL220! WE MISSED THE RESTR BY SEVERAL MI. ATC FREQS WERE BUSY AND WE HAD DIFFICULTY GETTING THROUGH. MISCOM AT A CRITICAL PHASE OF FLT.
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.