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FA20 crew on an arrival to yip level at FL240 were changed to an incorrect frequency delaying their descent on the arrival.
| Attributes | |
| ACN | 599330 |
| Time | |
| Date | 200311 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | intersection : cruxx |
| State Reference | MI |
| Altitude | msl single value : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau.artcc tracon : d21.tracon |
| Operator | common carrier : air taxi |
| Make Model Name | Falcon 20FJF/20C/20D/20E/20F |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent : intermediate altitude descent : approach |
| Route In Use | arrival star : cruxx |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 120 flight time total : 6300 flight time type : 1600 |
| ASRS Report | 599330 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : first officer |
| Events | |
| Anomaly | non adherence : published procedure other anomaly other |
| Independent Detector | atc equipment other atc equipment : radar/mode c other controllera other controllerb other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance none taken : detected after the fact |
| Supplementary | |
| Problem Areas | Airspace Structure Flight Crew Human Performance Aircraft ATC Human Performance |
| Primary Problem | Ambiguous |
Narrative:
We were level at FL240 on the cruxx 4 arrival into yip and just handed off to new center frequency. Both the first officer and I thought we heard the controller acknowledged us checking in on frequency. This new frequency was very congested and the controller was very busy. We were expecting to get a lower altitude soon. About 25 mi prior to cruxx intersection, I tried to request lower altitude from center to meet the crossing altitude to 'expect' at cruxx. It was very difficult to get through to center. Finally he heard us and after a brief pause, the controller told us to go back to our last assigned frequency. We were not in his sector. As we were doing that, detroit approach was calling us on 121.50. We got on the correct frequency and then descended and sequenced into their airspace for our arrival to yip. There were no other problems with the flight. In conclusion. Somehow there was a miscom on our initial contact with center. When we were not being assigned lower altitudes as expected for the arrival, I started calling center but frequency congestion delayed this. By that time, we were out of his sector and had to re-establish communication with a controller. All these delays caused us to cross cruxx at FL240.
Original NASA ASRS Text
Title: FA20 CREW ON AN ARR TO YIP LEVEL AT FL240 WERE CHANGED TO AN INCORRECT FREQ DELAYING THEIR DSCNT ON THE ARR.
Narrative: WE WERE LEVEL AT FL240 ON THE CRUXX 4 ARR INTO YIP AND JUST HANDED OFF TO NEW CTR FREQ. BOTH THE FO AND I THOUGHT WE HEARD THE CTLR ACKNOWLEDGED US CHKING IN ON FREQ. THIS NEW FREQ WAS VERY CONGESTED AND THE CTLR WAS VERY BUSY. WE WERE EXPECTING TO GET A LOWER ALT SOON. ABOUT 25 MI PRIOR TO CRUXX INTXN, I TRIED TO REQUEST LOWER ALT FROM CTR TO MEET THE XING ALT TO 'EXPECT' AT CRUXX. IT WAS VERY DIFFICULT TO GET THROUGH TO CTR. FINALLY HE HEARD US AND AFTER A BRIEF PAUSE, THE CTLR TOLD US TO GO BACK TO OUR LAST ASSIGNED FREQ. WE WERE NOT IN HIS SECTOR. AS WE WERE DOING THAT, DETROIT APCH WAS CALLING US ON 121.50. WE GOT ON THE CORRECT FREQ AND THEN DSNDED AND SEQUENCED INTO THEIR AIRSPACE FOR OUR ARR TO YIP. THERE WERE NO OTHER PROBS WITH THE FLT. IN CONCLUSION. SOMEHOW THERE WAS A MISCOM ON OUR INITIAL CONTACT WITH CTR. WHEN WE WERE NOT BEING ASSIGNED LOWER ALTS AS EXPECTED FOR THE ARR, I STARTED CALLING CTR BUT FREQ CONGESTION DELAYED THIS. BY THAT TIME, WE WERE OUT OF HIS SECTOR AND HAD TO RE-ESTABLISH COM WITH A CTLR. ALL THESE DELAYS CAUSED US TO CROSS CRUXX AT FL240.
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.