 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Flight crew of a fokker 100, (FK10), became confused as to the actual clearance intended by the ARTCC radar controller when he asked them to turn 10 degrees off course when climbing to a higher altitude. They thought that they had to wait for climb clearance. Controller seemed stressed with the traffic load.
| Attributes | |
| ACN | 410880 |
| Time | |
| Date | 199808 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : dtw |
| State Reference | MI |
| Altitude | msl bound lower : 25000 msl bound upper : 25000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau |
| Operator | common carrier : air carrier |
| Make Model Name | Fokker 100 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : flight engineer pilot : instrument pilot : cfi |
| Experience | flight time last 90 days : 200 flight time total : 9000 flight time type : 2300 |
| ASRS Report | 410880 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
While on climb we were level at FL250, awaiting climb to FL310 our cruising altitude. Chicago advised us to turn 10 degrees right for our 'climb to FL310.' it was more advisory from controller, not directive. We turned 10 degrees right, and awaited a clear clearance to FL310, none came, controller was busy. About 2 mins later controller cleared us to FL260 and to climb 'now.' we immediately climbed to FL260 and were cleared on to FL310 without further comment. It seems to me controller was 'thinking about a climb to FL310' when he told us to turn right but because of his workload, was not clear in his clearance. I took it to mean, turn right now and expect climb to FL310 later.
Original NASA ASRS Text
Title: FLC OF A FOKKER 100, (FK10), BECAME CONFUSED AS TO THE ACTUAL CLRNC INTENDED BY THE ARTCC RADAR CTLR WHEN HE ASKED THEM TO TURN 10 DEGS OFF COURSE WHEN CLBING TO A HIGHER ALT. THEY THOUGHT THAT THEY HAD TO WAIT FOR CLB CLRNC. CTLR SEEMED STRESSED WITH THE TFC LOAD.
Narrative: WHILE ON CLB WE WERE LEVEL AT FL250, AWAITING CLB TO FL310 OUR CRUISING ALT. CHICAGO ADVISED US TO TURN 10 DEGS R FOR OUR 'CLB TO FL310.' IT WAS MORE ADVISORY FROM CTLR, NOT DIRECTIVE. WE TURNED 10 DEGS R, AND AWAITED A CLR CLRNC TO FL310, NONE CAME, CTLR WAS BUSY. ABOUT 2 MINS LATER CTLR CLRED US TO FL260 AND TO CLB 'NOW.' WE IMMEDIATELY CLBED TO FL260 AND WERE CLRED ON TO FL310 WITHOUT FURTHER COMMENT. IT SEEMS TO ME CTLR WAS 'THINKING ABOUT A CLB TO FL310' WHEN HE TOLD US TO TURN R BUT BECAUSE OF HIS WORKLOAD, WAS NOT CLR IN HIS CLRNC. I TOOK IT TO MEAN, TURN R NOW AND EXPECT CLB TO FL310 LATER.
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.