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A CL65 flight crew misses approach controller's clearance for a descent and heading change when aircraft experiences a stuck microphone. The captain, PF, had been using an MEL'ed yoke push-to-talk switch inbound to cvg, ky.
| Attributes | |
| ACN | 483990 |
| Time | |
| Date | 200009 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : cvg.vortac |
| State Reference | KY |
| Altitude | msl single value : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : cvg.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Challenger CL604 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival : on vectors arrival star : mosey |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : cvg.tracon |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level |
| Route In Use | arrival : vfr |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 9000 flight time type : 1500 |
| ASRS Report | 483990 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : undershoot non adherence : clearance non adherence : published procedure other anomaly other other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued advisory controller : issued new clearance controller : separated traffic |
| Consequence | Other |
| Miss Distance | horizontal : 30000 vertical : 500 |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During the mosey 5 STAR to cvg, we were flying toward the cvg VOR at 10000 ft MSL assigned, and awaiting a vector to downwind (right) to runway 18R. We remember hearing the controller say something, then he said 'flight X check for stuck microphone.' I realized we were close to on top of runway 18R and first officer (who was flying) immediately complied with controller's request to turn left to heading of 300 degrees. I looked at the TCASII and saw the closest target at 5 mi, 10 O'clock position and 500 ft above. Of note is that my push-to-talk switch on yoke was deferred. I was making every effort to use the other switch on console but may have inadvertently used it. I recommend that in future, deferred push-to-talk switches be disabled so that they can't be accidentally used.
Original NASA ASRS Text
Title: A CL65 FLC MISSES APCH CTLR'S CLRNC FOR A DSCNT AND HDG CHANGE WHEN ACFT EXPERIENCES A STUCK MIKE. THE CAPT, PF, HAD BEEN USING AN MEL'ED YOKE PUSH-TO-TALK SWITCH INBOUND TO CVG, KY.
Narrative: DURING THE MOSEY 5 STAR TO CVG, WE WERE FLYING TOWARD THE CVG VOR AT 10000 FT MSL ASSIGNED, AND AWAITING A VECTOR TO DOWNWIND (R) TO RWY 18R. WE REMEMBER HEARING THE CTLR SAY SOMETHING, THEN HE SAID 'FLT X CHK FOR STUCK MIKE.' I REALIZED WE WERE CLOSE TO ON TOP OF RWY 18R AND FO (WHO WAS FLYING) IMMEDIATELY COMPLIED WITH CTLR'S REQUEST TO TURN L TO HDG OF 300 DEGS. I LOOKED AT THE TCASII AND SAW THE CLOSEST TARGET AT 5 MI, 10 O'CLOCK POS AND 500 FT ABOVE. OF NOTE IS THAT MY PUSH-TO-TALK SWITCH ON YOKE WAS DEFERRED. I WAS MAKING EVERY EFFORT TO USE THE OTHER SWITCH ON CONSOLE BUT MAY HAVE INADVERTENTLY USED IT. I RECOMMEND THAT IN FUTURE, DEFERRED PUSH-TO-TALK SWITCHES BE DISABLED SO THAT THEY CAN'T BE ACCIDENTALLY USED.
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.