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An atx flight crew flying freight in an LJ35 improperly set their communication radio resulting in a temporary loss of communication with ZOB.
| Attributes | |
| ACN | 439140 |
| Time | |
| Date | 199906 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : zob.artcc |
| State Reference | OH |
| Altitude | msl single value : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air taxi |
| Make Model Name | Learjet 35 |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 90 flight time total : 7600 flight time type : 2500 |
| ASRS Report | 439140 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | non adherence : far other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Given a vector for traffic. Sic began to get ATIS prior to descent. After a few mins I noticed no ATC xmissions. I then pushed the squelch button on the #1 communication -- no static. I then increased the volume on my audio panel and heard ZOB calling. I responded to ATC that we had inadvertently deselected the communication. I then queried if I should call him on the phone when we got on the ground. His response, 'no, it just wasn't the right time to do it.' we were using a portable intercom with ATC being monitored over the intercom, and company frequency on the PIC's audio panel/speaker. When the sic deselected #1 communication to get ATIS, the PIC failed to verify the volume was up on the #1 audio panel, when he selected #1 communication to monitor ATC. Testing the communication(south) whenever changing frequency, or monitoring will now be standard practice for me.
Original NASA ASRS Text
Title: AN ATX FLC FLYING FREIGHT IN AN LJ35 IMPROPERLY SET THEIR COM RADIO RESULTING IN A TEMPORARY LOSS OF COM WITH ZOB.
Narrative: GIVEN A VECTOR FOR TFC. SIC BEGAN TO GET ATIS PRIOR TO DSCNT. AFTER A FEW MINS I NOTICED NO ATC XMISSIONS. I THEN PUSHED THE SQUELCH BUTTON ON THE #1 COM -- NO STATIC. I THEN INCREASED THE VOLUME ON MY AUDIO PANEL AND HEARD ZOB CALLING. I RESPONDED TO ATC THAT WE HAD INADVERTENTLY DESELECTED THE COM. I THEN QUERIED IF I SHOULD CALL HIM ON THE PHONE WHEN WE GOT ON THE GND. HIS RESPONSE, 'NO, IT JUST WASN'T THE RIGHT TIME TO DO IT.' WE WERE USING A PORTABLE INTERCOM WITH ATC BEING MONITORED OVER THE INTERCOM, AND COMPANY FREQ ON THE PIC'S AUDIO PANEL/SPEAKER. WHEN THE SIC DESELECTED #1 COM TO GET ATIS, THE PIC FAILED TO VERIFY THE VOLUME WAS UP ON THE #1 AUDIO PANEL, WHEN HE SELECTED #1 COM TO MONITOR ATC. TESTING THE COM(S) WHENEVER CHANGING FREQ, OR MONITORING WILL NOW BE STANDARD PRACTICE FOR ME.
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.