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Air carrier on base leg to land at sna lost communication with approach. After circling the crew established contact with sna tower and were switched to another approach frequency.
| Attributes | |
| ACN | 406852 |
| Time | |
| Date | 199806 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sna |
| State Reference | CA |
| Altitude | msl bound lower : 7000 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lax tower : lax |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Route In Use | approach : circling 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 | 406852 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 225 flight time total : 8600 flight time type : 525 |
| ASRS Report | 405620 |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : exited adverse environment flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | other physical facility |
| Navigational Aid | Unspecified |
Narrative:
On base leg for ILS runway 19R at sna, 7000 ft MSL on vector heading 265 degrees and 150 KIAS we lost radio contact with socal approach. As we flew through the localizer we tried to re- establish contact on 124.1 or 132.85 then tried frequency 123.1. We could hear him but he did not acknowledge our transmission. Because we were so high (7000 ft) and 12 DME from sna I could not turn left to proceed directly to the airport because I couldn't get down. I made a right turn toward the localizer and visual approach to the airport. At this time the first officer contacted sna tower and they gave us a new approach frequency. We contacted them and received vectors for landing and visual approach. After landing, I phoned sna tower and talked with the controller and then phoned socal approach and spoke with supervisor. Our VHF radios worked fine and I suspect socal approach transmitter was the problem.
Original NASA ASRS Text
Title: ACR ON BASE LEG TO LAND AT SNA LOST COM WITH APCH. AFTER CIRCLING THE CREW ESTABLISHED CONTACT WITH SNA TWR AND WERE SWITCHED TO ANOTHER APCH FREQ.
Narrative: ON BASE LEG FOR ILS RWY 19R AT SNA, 7000 FT MSL ON VECTOR HDG 265 DEGS AND 150 KIAS WE LOST RADIO CONTACT WITH SOCAL APCH. AS WE FLEW THROUGH THE LOC WE TRIED TO RE- ESTABLISH CONTACT ON 124.1 OR 132.85 THEN TRIED FREQ 123.1. WE COULD HEAR HIM BUT HE DID NOT ACKNOWLEDGE OUR XMISSION. BECAUSE WE WERE SO HIGH (7000 FT) AND 12 DME FROM SNA I COULD NOT TURN L TO PROCEED DIRECTLY TO THE ARPT BECAUSE I COULDN'T GET DOWN. I MADE A R TURN TOWARD THE LOC AND VISUAL APCH TO THE ARPT. AT THIS TIME THE FO CONTACTED SNA TWR AND THEY GAVE US A NEW APCH FREQ. WE CONTACTED THEM AND RECEIVED VECTORS FOR LNDG AND VISUAL APCH. AFTER LNDG, I PHONED SNA TWR AND TALKED WITH THE CTLR AND THEN PHONED SOCAL APCH AND SPOKE WITH SUPVR. OUR VHF RADIOS WORKED FINE AND I SUSPECT SOCAL APCH XMITTER WAS THE PROB.
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.