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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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An air carrier B737 apparently missed several calls by the ARTCC controller for an altitude change. When the controller finally contacted the air carrier she had to turn the air carrier and another aircraft to maintain separation.
| Attributes | |
| ACN | 360607 |
| Time | |
| Date | 199702 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : pxt |
| State Reference | MD |
| Altitude | msl bound lower : 27000 msl bound upper : 27000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 10000 flight time type : 2800 |
| ASRS Report | 360607 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 54000 vertical : 0 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
Apparently, controller called us several times after she had assumed that we had acknowledged an altitude change. (Which we never did hear or acknowledge.) when she called, she turned both us and another aircraft 90 degrees from our courses in opposite directions. Apparently we had come within 10 NM of one another at the same altitude.
Original NASA ASRS Text
Title: AN ACR B737 APPARENTLY MISSED SEVERAL CALLS BY THE ARTCC CTLR FOR AN ALT CHANGE. WHEN THE CTLR FINALLY CONTACTED THE ACR SHE HAD TO TURN THE ACR AND ANOTHER ACFT TO MAINTAIN SEPARATION.
Narrative: APPARENTLY, CTLR CALLED US SEVERAL TIMES AFTER SHE HAD ASSUMED THAT WE HAD ACKNOWLEDGED AN ALT CHANGE. (WHICH WE NEVER DID HEAR OR ACKNOWLEDGE.) WHEN SHE CALLED, SHE TURNED BOTH US AND ANOTHER ACFT 90 DEGS FROM OUR COURSES IN OPPOSITE DIRECTIONS. APPARENTLY WE HAD COME WITHIN 10 NM OF ONE ANOTHER AT THE SAME ALT.
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.