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B767 flight crew reports sbaz ATC radio failure. Aircraft transiting through sbaz airspace continued on filed routes and maintained own separation using TCAS and radio reports on 123.45.
| Attributes | |
| ACN | 746667 |
| Time | |
| Date | 200707 |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | atc facility : sbaz.artcc |
| State Reference | FO |
| Altitude | msl single value : 32000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 200 flight time total : 25000 flight time type : 6817 |
| ASRS Report | 746667 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 210 flight time total : 10000 flight time type : 4000 |
| ASRS Report | 747209 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Supplementary | |
| Problem Areas | ATC Facility |
| Primary Problem | ATC Facility |
Narrative:
We were handed off to sbaz center without any indication that they were having problems. After attempting to contact sbaz on every possible frequency we contacted dispatch to recruit their assistance to establish contact with sbaz center. Situational awareness and safe separation from other aircraft were maintained at all times by communicating directly with them our position; altitude; and direction of flight on airway; on the air to air frequency. Contact with dispatch was frequent during our transition through sbaz airspace.supplemental information acn 747209: all aircraft in amazonica brazil airspace lost communication with controllers on all assigned and published frequencies. Communications were never reestablished until exiting amazonica airspace. All flts continued as filed and under clear conditions exercising all possible safety measures; all exterior lights on; slop; position reports on common frequency 123.45; and TCAS monitoring. Cause unknown. Remainder of flight uneventful.
Original NASA ASRS Text
Title: B767 FLT CREW RPTS SBAZ ATC RADIO FAILURE. ACFT TRANSITING THROUGH SBAZ AIRSPACE CONTINUED ON FILED ROUTES AND MAINTAINED OWN SEPARATION USING TCAS AND RADIO RPTS ON 123.45.
Narrative: WE WERE HANDED OFF TO SBAZ CENTER WITHOUT ANY INDICATION THAT THEY WERE HAVING PROBLEMS. AFTER ATTEMPTING TO CONTACT SBAZ ON EVERY POSSIBLE FREQUENCY WE CONTACTED DISPATCH TO RECRUIT THEIR ASSISTANCE TO ESTABLISH CONTACT WITH SBAZ CENTER. SITUATIONAL AWARENESS AND SAFE SEPARATION FROM OTHER ACFT WERE MAINTAINED AT ALL TIMES BY COMMUNICATING DIRECTLY WITH THEM OUR POSITION; ALTITUDE; AND DIRECTION OF FLT ON AIRWAY; ON THE AIR TO AIR FREQUENCY. CONTACT WITH DISPATCH WAS FREQUENT DURING OUR TRANSITION THROUGH SBAZ AIRSPACE.SUPPLEMENTAL INFO ACN 747209: ALL ACFT IN AMAZONICA BRAZIL AIRSPACE LOST COM WITH CTLRS ON ALL ASSIGNED AND PUBLISHED FREQUENCIES. COMS WERE NEVER REESTABLISHED UNTIL EXITING AMAZONICA AIRSPACE. ALL FLTS CONTINUED AS FILED AND UNDER CLR CONDITIONS EXERCISING ALL POSSIBLE SAFETY MEASURES; ALL EXTERIOR LIGHTS ON; SLOP; POSITION RPTS ON COMMON FREQ 123.45; AND TCAS MONITORING. CAUSE UNKNOWN. REMAINDER OF FLT UNEVENTFUL.
Data retrieved from NASA's ASRS site as of January 2009 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.