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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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PIC of a B737 meant to change the mileage range on his TCASII but inadvertently changed his transponder code instead. Controller caught the error. Reporter mentioned the proximity of the 2 controls to one another.
| Attributes | |
| ACN | 367673 |
| Time | |
| Date | 199704 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zzz |
| State Reference | US |
| Altitude | msl bound lower : 31000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 80 flight time total : 30000 flight time type : 18000 |
| ASRS Report | 367673 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | non adherence : far non adherence : clearance non adherence other other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : became reoriented other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
I went to expand TCASII from 5 mi to the 15 NM range and moved transponder knob 1 digit, by mistake. They are next to each other on the console. ATC advised me of squawk change.
Original NASA ASRS Text
Title: PIC OF A B737 MEANT TO CHANGE THE MILEAGE RANGE ON HIS TCASII BUT INADVERTENTLY CHANGED HIS XPONDER CODE INSTEAD. CTLR CAUGHT THE ERROR. RPTR MENTIONED THE PROX OF THE 2 CTLS TO ONE ANOTHER.
Narrative: I WENT TO EXPAND TCASII FROM 5 MI TO THE 15 NM RANGE AND MOVED XPONDER KNOB 1 DIGIT, BY MISTAKE. THEY ARE NEXT TO EACH OTHER ON THE CONSOLE. ATC ADVISED ME OF SQUAWK CHANGE.
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.