37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Attributes | |
ACN | 524280 |
Time | |
Date | 200109 |
Day | Fri |
Local Time Of Day | 0601 To 1200 |
Place | |
Locale Reference | atc facility : zme.artcc |
State Reference | TN |
Altitude | msl bound lower : 33000 msl bound upper : 39000 |
Environment | |
Flight Conditions | VMC |
Light | Daylight |
Aircraft 1 | |
Operator | common carrier : air carrier |
Make Model Name | B757 Undifferentiated or Other Model |
Flight Phase | cruise : enroute altitude change |
Flight Plan | IFR |
Person 1 | |
Affiliation | company : air carrier |
Function | flight crew : captain oversight : pic |
Qualification | pilot : flight engineer pilot : atp |
Experience | controller military : 24 controller non radar : 1 controller radar : 30 flight time last 90 days : 180 flight time total : 10000 flight time type : 580 |
ASRS Report | 524280 |
Events | |
Anomaly | altitude deviation : overshoot inflight encounter : turbulence non adherence : clearance non adherence : published procedure |
Resolutory Action | controller : issued new clearance |
Consequence | faa : reviewed incident with flight crew |
Supplementary | |
Problem Areas | Flight Crew Human Performance ATC Human Performance |
Primary Problem | Ambiguous |
Narrative:
On ZMP at FL390. FL390 was bumpy so requested FL310. Cleared to descend to FL350. During descent requested on down to FL310 for better ride. Believe we were cleared to FL310 and first officer read back cleared to FL310. Passing approximately FL330 center told us we were only cleared to FL350. Nothing on TCASII. We went to FL310 and were given a frequency change. I went back to previous frequency and controller said, don't worry, no conflict.
Original NASA ASRS Text
Title: AN ACR CREW REQUESTED AND THOUGHT THEY HAD RECEIVED CLRNC TO DSND TO FL310 SO THEY READ IT BACK BUT WERE QUESTIONED BY THE ARTCC RADAR CTLR AS THEY PASSED THROUGH FL330.
Narrative: ON ZMP AT FL390. FL390 WAS BUMPY SO REQUESTED FL310. CLRED TO DSND TO FL350. DURING DSCNT REQUESTED ON DOWN TO FL310 FOR BETTER RIDE. BELIEVE WE WERE CLRED TO FL310 AND FO READ BACK CLRED TO FL310. PASSING APPROX FL330 CTR TOLD US WE WERE ONLY CLRED TO FL350. NOTHING ON TCASII. WE WENT TO FL310 AND WERE GIVEN A FREQ CHANGE. I WENT BACK TO PREVIOUS FREQ AND CTLR SAID, DON'T WORRY, 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.