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A C172 CFI and his student lose their 2-WAY communication while approaching sna on a vector at 3000 ft. Reporter says his radio failure was 'inadvertent.'
| Attributes | |
| ACN | 392795 |
| Time | |
| Date | 199801 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sna airport : l66 |
| State Reference | CA |
| Altitude | msl bound lower : 3000 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lax |
| Operator | general aviation : personal |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | instruction : instructor oversight : pic |
| Qualification | pilot : instrument pilot : cfi pilot : commercial |
| Experience | flight time last 90 days : 100 flight time total : 1100 flight time type : 100 |
| ASRS Report | 392795 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot instruction : trainee |
| Qualification | pilot : private |
| Events | |
| Anomaly | aircraft equipment problem : critical inflight encounter : weather other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency none taken : unable other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
My instrument student and I finished our air work offshore from lgb. We asked for and received a pop-up IFR clearance to sna via radar vectors. On vectors to the sna ILS runway 19R localizer, we experienced a 2-WAY radio failure that was inadvertent. We attempted to contact socal on 121.3 but could not get a response. The last vector took us across the localizer and even after troubleshooting we were still lost communication. We continued to transmit in the blind to notify ATC of our intention to remain above the cloud deck 500 ft below us and attempt to return to sna in VFR conditions. We abandoned our approach and turned eastbound in VFR conditions while squawking 7600. We attempted to descend around the edge of the cloud layer and proceed back to sna below the cloud deck but could not maintain VFR. We then diverted to corona airport and contacted an FSS on landline to report safe on the ground.
Original NASA ASRS Text
Title: A C172 CFI AND HIS STUDENT LOSE THEIR 2-WAY COM WHILE APCHING SNA ON A VECTOR AT 3000 FT. RPTR SAYS HIS RADIO FAILURE WAS 'INADVERTENT.'
Narrative: MY INST STUDENT AND I FINISHED OUR AIR WORK OFFSHORE FROM LGB. WE ASKED FOR AND RECEIVED A POP-UP IFR CLRNC TO SNA VIA RADAR VECTORS. ON VECTORS TO THE SNA ILS RWY 19R LOC, WE EXPERIENCED A 2-WAY RADIO FAILURE THAT WAS INADVERTENT. WE ATTEMPTED TO CONTACT SOCAL ON 121.3 BUT COULD NOT GET A RESPONSE. THE LAST VECTOR TOOK US ACROSS THE LOC AND EVEN AFTER TROUBLESHOOTING WE WERE STILL LOST COM. WE CONTINUED TO XMIT IN THE BLIND TO NOTIFY ATC OF OUR INTENTION TO REMAIN ABOVE THE CLOUD DECK 500 FT BELOW US AND ATTEMPT TO RETURN TO SNA IN VFR CONDITIONS. WE ABANDONED OUR APCH AND TURNED EBOUND IN VFR CONDITIONS WHILE SQUAWKING 7600. WE ATTEMPTED TO DSND AROUND THE EDGE OF THE CLOUD LAYER AND PROCEED BACK TO SNA BELOW THE CLOUD DECK BUT COULD NOT MAINTAIN VFR. WE THEN DIVERTED TO CORONA ARPT AND CONTACTED AN FSS ON LANDLINE TO RPT SAFE ON THE GND.
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.