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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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PIC report of a stuck microphone on a DC10 that was implied to have caused their 2 VHF communication radios to be inoperative, at least on the approach control frequency into sfo. It was not clear if approach clearance was received prior to their communication problem. They were able, however, to transmit their intentions on 121 pt 5 guard frequency, indicating an operative microphone and VHF.
| Attributes | |
| ACN | 369843 |
| Time | |
| Date | 199705 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sfo |
| State Reference | CA |
| Altitude | msl bound lower : 11000 msl bound upper : 11000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : oak |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | descent : approach descent other |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 369843 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : published procedure other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | other |
| Consequence | faa : reviewed incident with flight crew Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
Location: sfo 095 degree radial, 20 NM. VHF communication #2 lost after first hour. VHF communication #1 lost on approach to sfo at 11000 ft. When we discovered the problem we were told to descend to the marker, make 1 turn in holding as published, and fly the ILS runway 28R. We announced our intention on guard, and received a sporadic call that we were cleared to land. After landing I called approach and tower by phone and they were happy. Turned out we had a stuck microphone.
Original NASA ASRS Text
Title: PIC RPT OF A STUCK MIKE ON A DC10 THAT WAS IMPLIED TO HAVE CAUSED THEIR 2 VHF COM RADIOS TO BE INOP, AT LEAST ON THE APCH CTL FREQ INTO SFO. IT WAS NOT CLR IF APCH CLRNC WAS RECEIVED PRIOR TO THEIR COM PROB. THEY WERE ABLE, HOWEVER, TO XMIT THEIR INTENTIONS ON 121 PT 5 GUARD FREQ, INDICATING AN OPERATIVE MIKE AND VHF.
Narrative: LOCATION: SFO 095 DEG RADIAL, 20 NM. VHF COM #2 LOST AFTER FIRST HR. VHF COM #1 LOST ON APCH TO SFO AT 11000 FT. WHEN WE DISCOVERED THE PROB WE WERE TOLD TO DSND TO THE MARKER, MAKE 1 TURN IN HOLDING AS PUBLISHED, AND FLY THE ILS RWY 28R. WE ANNOUNCED OUR INTENTION ON GUARD, AND RECEIVED A SPORADIC CALL THAT WE WERE CLRED TO LAND. AFTER LNDG I CALLED APCH AND TWR BY PHONE AND THEY WERE HAPPY. TURNED OUT WE HAD A STUCK MIKE.
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.