 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Air carrier large transport given frequency change prematurely. Change was confirmed on request, but later corrected by ZAU.
| Attributes | |
| ACN | 122665 |
| Time | |
| Date | 198909 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | msl bound lower : 1400 msl bound upper : 7800 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 190 flight time total : 8000 flight time type : 450 |
| ASRS Report | 122665 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Deviation |
Narrative:
After departing runway 32L from ord, we contacted departure control on frequency 125.4. Almost immediately we were told to contact chicago center on frequency 127.6. After contacting ZAU, we were cleared to FL200. Leaving 7000' we verified our cleared altitude, and also verified that we should indeed be on frequency 127.6. The answer was affirmative to both questions. However, leaving 7800', we were told to descend to 7000' and contact departure control on frequency 124.5, at which time we were cleared to climb to 13000'. Our flight # was company ADI, and even though we read back every clearance with company ADI, I believe the controller confused us with company idi, also on the frequency at the same time.
Original NASA ASRS Text
Title: ACR LGT GIVEN FREQ CHANGE PREMATURELY. CHANGE WAS CONFIRMED ON REQUEST, BUT LATER CORRECTED BY ZAU.
Narrative: AFTER DEPARTING RWY 32L FROM ORD, WE CONTACTED DEP CTL ON FREQ 125.4. ALMOST IMMEDIATELY WE WERE TOLD TO CONTACT CHICAGO CENTER ON FREQ 127.6. AFTER CONTACTING ZAU, WE WERE CLRED TO FL200. LEAVING 7000' WE VERIFIED OUR CLRED ALT, AND ALSO VERIFIED THAT WE SHOULD INDEED BE ON FREQ 127.6. THE ANSWER WAS AFFIRMATIVE TO BOTH QUESTIONS. HOWEVER, LEAVING 7800', WE WERE TOLD TO DSND TO 7000' AND CONTACT DEP CTL ON FREQ 124.5, AT WHICH TIME WE WERE CLRED TO CLB TO 13000'. OUR FLT # WAS COMPANY ADI, AND EVEN THOUGH WE READ BACK EVERY CLRNC WITH COMPANY ADI, I BELIEVE THE CTLR CONFUSED US WITH COMPANY IDI, ALSO ON THE FREQ AT THE SAME TIME.
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.