 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Medium large transport copied descent clearance for another aircraft with similar call sign, but on different frequency. Started descent and then questioned ATC.
| Attributes | |
| ACN | 80343 |
| Time | |
| Date | 198801 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : sgj |
| State Reference | FL |
| Altitude | msl bound lower : 16600 msl bound upper : 17000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other descent other |
| Route In Use | enroute airway : zjx |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 200 flight time total : 15200 flight time type : 1350 |
| ASRS Report | 80343 |
| Person 2 | |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
We were clrd to 17000' by controller working at least 2 different frequencys. We were clrd to cross lamma intersection at 12000'. We acknowledged clearance and started des. Center made no comment. I started the des, but stopped at 16600' and reconfirmed clearance with center, as we were on assigned heading for dab. Center said our clearance was still 17000' and clearance was for aircraft with similar call sign, but then clrd us to 12000'. We started to question his previous clearance, but he said he was too busy and call on ground. No further problems. This is my greatest concern with controllers, whether ground, tower, approach-departure or center using 2 or more frequencys. Sooner or later it is going to cause a major problem or accident.
Original NASA ASRS Text
Title: MLG COPIED DESCENT CLRNC FOR ANOTHER ACFT WITH SIMILAR CALL SIGN, BUT ON DIFFERENT FREQ. STARTED DESCENT AND THEN QUESTIONED ATC.
Narrative: WE WERE CLRD TO 17000' BY CTLR WORKING AT LEAST 2 DIFFERENT FREQS. WE WERE CLRD TO CROSS LAMMA INTXN AT 12000'. WE ACKNOWLEDGED CLRNC AND STARTED DES. CENTER MADE NO COMMENT. I STARTED THE DES, BUT STOPPED AT 16600' AND RECONFIRMED CLRNC WITH CENTER, AS WE WERE ON ASSIGNED HDG FOR DAB. CENTER SAID OUR CLRNC WAS STILL 17000' AND CLRNC WAS FOR ACFT WITH SIMILAR CALL SIGN, BUT THEN CLRD US TO 12000'. WE STARTED TO QUESTION HIS PREVIOUS CLRNC, BUT HE SAID HE WAS TOO BUSY AND CALL ON GND. NO FURTHER PROBS. THIS IS MY GREATEST CONCERN WITH CTLRS, WHETHER GND, TWR, APCH-DEP OR CENTER USING 2 OR MORE FREQS. SOONER OR LATER IT IS GOING TO CAUSE A MAJOR PROB OR ACCIDENT.
Data retrieved from NASA's ASRS site as of August 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.