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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Flight crew of a DH8-200 lose contact with the center controller when their radio apparently automatic shifted to another frequency. Pilots had a previous problem with the backgnd led lighting of the standby frequency head.
| Attributes | |
| ACN | 367873 |
| Time | |
| Date | 199705 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : ocf |
| State Reference | FL |
| Altitude | msl bound lower : 17000 msl bound upper : 17000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx tower : vrb |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Transport, High Wing, 2 Turboprop Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 150 flight time total : 3100 flight time type : 500 |
| ASRS Report | 367873 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 270 flight time total : 14000 flight time type : 10000 |
| ASRS Report | 368034 |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : became reoriented flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
My leg, leg 6 of 8 this day. We experienced a frequency head display problem. Standby frequency led's were not lit. After resetting the radio, we asked ZJX for a frequency check and verification of the altitude we were cleared to. All was normal. Usually center descends us to cross ocala at 11000 ft and we were approaching it rapidly. We asked ZJX for a descent and were answered by vrb tower. We do not know how frequency became selected. Neither the captain nor myself remember touching the radio after the radio check. We re-established communications with center and no traffic conflicts occurred during our absence. Aircraft type was a dash 8-200 equipped with collins pro-line radios.
Original NASA ASRS Text
Title: FLC OF A DH8-200 LOSE CONTACT WITH THE CTR CTLR WHEN THEIR RADIO APPARENTLY AUTO SHIFTED TO ANOTHER FREQ. PLTS HAD A PREVIOUS PROB WITH THE BACKGND LED LIGHTING OF THE STANDBY FREQ HEAD.
Narrative: MY LEG, LEG 6 OF 8 THIS DAY. WE EXPERIENCED A FREQ HEAD DISPLAY PROB. STANDBY FREQ LED'S WERE NOT LIT. AFTER RESETTING THE RADIO, WE ASKED ZJX FOR A FREQ CHK AND VERIFICATION OF THE ALT WE WERE CLRED TO. ALL WAS NORMAL. USUALLY CTR DSNDS US TO CROSS OCALA AT 11000 FT AND WE WERE APCHING IT RAPIDLY. WE ASKED ZJX FOR A DSCNT AND WERE ANSWERED BY VRB TWR. WE DO NOT KNOW HOW FREQ BECAME SELECTED. NEITHER THE CAPT NOR MYSELF REMEMBER TOUCHING THE RADIO AFTER THE RADIO CHK. WE RE-ESTABLISHED COMS WITH CTR AND NO TFC CONFLICTS OCCURRED DURING OUR ABSENCE. ACFT TYPE WAS A DASH 8-200 EQUIPPED WITH COLLINS PRO-LINE RADIOS.
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.