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A DC10 freighter captain report on their stuck microphone that gave the controller 'a lot of grief' while on and off frequency with ZKC, mo.
| Attributes | |
| ACN | 459750 |
| Time | |
| Date | 200001 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zkc.artcc |
| State Reference | KS |
| Altitude | msl single value : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 30F |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 25 flight time total : 4000 flight time type : 1500 |
| ASRS Report | 459750 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : less severe maintenance problem : improper maintenance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued advisory flight crew : overcame equipment problem flight crew : became reoriented |
| Consequence | faa : reviewed incident with flight crew other other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Maintenance Human Performance Company ATC Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Our flight was flying mem-msp and was in ZKC airspace. We had checked in with ZKC once and after about 15 mins, decided to do a radio check with ZKC because it had been unusually quiet during that time. Once we checked in, ZKC told us that we had a stuck microphone and had caused the controller a lot of 'grief,' which we totally understood! We explained that we were totally unaware of the 'stuck microphone' and it was certainly unintentional. Further communication was normal for our flight. Cause of problem: we found a bracket which protects the hand microphone in the stowed position was bent inboard enough to actually key the microphone. Once this bracket was bent back to the normal position, the hand microphone could be stowed without interference. This situation was explained to maintenance in msp. We also initiated a safety report and recommended all DC10's be inspected for similar problems.
Original NASA ASRS Text
Title: A DC10 FREIGHTER CAPT RPT ON THEIR STUCK MIKE THAT GAVE THE CTLR 'A LOT OF GRIEF' WHILE ON AND OFF FREQ WITH ZKC, MO.
Narrative: OUR FLT WAS FLYING MEM-MSP AND WAS IN ZKC AIRSPACE. WE HAD CHKED IN WITH ZKC ONCE AND AFTER ABOUT 15 MINS, DECIDED TO DO A RADIO CHK WITH ZKC BECAUSE IT HAD BEEN UNUSUALLY QUIET DURING THAT TIME. ONCE WE CHKED IN, ZKC TOLD US THAT WE HAD A STUCK MIKE AND HAD CAUSED THE CTLR A LOT OF 'GRIEF,' WHICH WE TOTALLY UNDERSTOOD! WE EXPLAINED THAT WE WERE TOTALLY UNAWARE OF THE 'STUCK MIKE' AND IT WAS CERTAINLY UNINTENTIONAL. FURTHER COM WAS NORMAL FOR OUR FLT. CAUSE OF PROB: WE FOUND A BRACKET WHICH PROTECTS THE HAND MIKE IN THE STOWED POS WAS BENT INBOARD ENOUGH TO ACTUALLY KEY THE MIKE. ONCE THIS BRACKET WAS BENT BACK TO THE NORMAL POS, THE HAND MIKE COULD BE STOWED WITHOUT INTERFERENCE. THIS SIT WAS EXPLAINED TO MAINT IN MSP. WE ALSO INITIATED A SAFETY RPT AND RECOMMENDED ALL DC10'S BE INSPECTED FOR SIMILAR PROBS.
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.