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Air carrier flight crew states that ATC clearance for FL290 was given followed by a request for increased descent rate. Controller intervened as aircraft descended through FL315. Clearance acknowledged disputed.
| Attributes | |
| ACN | 319842 |
| Time | |
| Date | 199510 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : chs |
| State Reference | SC |
| Altitude | msl bound lower : 31500 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | enroute airway : zjx |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 13400 flight time type : 4000 |
| ASRS Report | 319842 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 180 flight time total : 11000 flight time type : 4000 |
| ASRS Report | 320170 |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | other |
Narrative:
Over chs VOR, ZJX asked us to confirm mach number. We acknowledged .65 mach. ZJX asked if it was an operation restr, we confirmed it was. ZJX directed (cleared) us to descend to FL290. We acknowledged the clearance and began the descent. ZJX then asked us to increase our descent rate. We acknowledged the request and increased the descent rate. Passing FL315, ZJX said we should be at FL330. We stated we had been cleared to FL290 but returned to FL330. During all communications we used our full call sign.
Original NASA ASRS Text
Title: ACR FLC STATES THAT ATC CLRNC FOR FL290 WAS GIVEN FOLLOWED BY A REQUEST FOR INCREASED DSCNT RATE. CTLR INTERVENED AS ACFT DSNDED THROUGH FL315. CLRNC ACKNOWLEDGED DISPUTED.
Narrative: OVER CHS VOR, ZJX ASKED US TO CONFIRM MACH NUMBER. WE ACKNOWLEDGED .65 MACH. ZJX ASKED IF IT WAS AN OP RESTR, WE CONFIRMED IT WAS. ZJX DIRECTED (CLRED) US TO DSND TO FL290. WE ACKNOWLEDGED THE CLRNC AND BEGAN THE DSCNT. ZJX THEN ASKED US TO INCREASE OUR DSCNT RATE. WE ACKNOWLEDGED THE REQUEST AND INCREASED THE DSCNT RATE. PASSING FL315, ZJX SAID WE SHOULD BE AT FL330. WE STATED WE HAD BEEN CLRED TO FL290 BUT RETURNED TO FL330. DURING ALL COMS WE USED OUR FULL CALL SIGN.
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.