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Flight crew of an L1011 descended from cruise altitude after hearing and reading back a descent clearance. However, ARTCC controller stopped them since the clearance was not for them.
| Attributes | |
| ACN | 478733 |
| Time | |
| Date | 200006 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| State Reference | GA |
| Altitude | msl bound lower : 25400 msl bound upper : 26000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | L-1011 Tri-Star All Series |
| Operating Under FAR Part | Part 121 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Flight Phase | descent : vacating altitude |
| Route In Use | arrival star : leese. leexa |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 15500 flight time type : 3800 |
| ASRS Report | 478733 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : instrument pilot : multi engine |
| Experience | flight time last 90 days : 110 flight time total : 5800 flight time type : 830 |
| ASRS Report | 477390 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | atc equipment other atc equipment : radar other controllera |
| Resolutory Action | controller : issued new clearance controller : issued alert flight crew : returned to assigned altitude |
| Consequence | Other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
After passing clawz intersection, we (air carrier X) were cleared to maintain heading 100 degrees to intercept the alma transition, leese 9 arrival to orl airport and to descend to 10000 ft MSL. The first officer read back the clearance including the altitude. We started our descent from FL270 to 10000 ft MSL and called ZJX to report leaving FL270. Descending out of FL254, ZJX advised us that we were not cleared for descent. He cleared us to maintain FL260, which we did.
Original NASA ASRS Text
Title: FLC OF AN L1011 DSNDED FROM CRUISE ALT AFTER HEARING AND READING BACK A DSCNT CLRNC. HOWEVER, ARTCC CTLR STOPPED THEM SINCE THE CLRNC WAS NOT FOR THEM.
Narrative: AFTER PASSING CLAWZ INTXN, WE (ACR X) WERE CLRED TO MAINTAIN HDG 100 DEGS TO INTERCEPT THE ALMA TRANSITION, LEESE 9 ARR TO ORL ARPT AND TO DSND TO 10000 FT MSL. THE FO READ BACK THE CLRNC INCLUDING THE ALT. WE STARTED OUR DSCNT FROM FL270 TO 10000 FT MSL AND CALLED ZJX TO RPT LEAVING FL270. DSNDING OUT OF FL254, ZJX ADVISED US THAT WE WERE NOT CLRED FOR DSCNT. HE CLRED US TO MAINTAIN FL260, WHICH WE DID.
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.