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Sbr-1 experiences encounter with opposite direction traffic when radio communications with center are compromised.
| Attributes | |
| ACN | 812831 |
| Time | |
| Date | 200811 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : chs.airport |
| State Reference | SC |
| Altitude | msl single value : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | other |
| Make Model Name | Rockwell North American Civil Twin Jet |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : military |
| Function | flight crew : captain instruction : instructor oversight : pic |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine pilot : atp |
| Experience | flight time last 90 days : 140 flight time total : 7400 flight time type : 4500 |
| ASRS Report | 812831 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Events | |
| Anomaly | aircraft equipment problem : less severe conflict : airborne less severe non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued alert controller : issued new clearance flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft ATC Human Performance |
| Primary Problem | Ambiguous |
Narrative:
On a navy training flight for navigator training at FL240 was assigned a new frequency/controller. We tried numerous times; (approximately 5 or 6) to check-in on UHF frequency; student at least twice; then I turned squelch off; student tried again; then I tried twice. We heard the controller say our call sign 3 or 4 times. She was very busy on VHF frequency and our call was followed by instructions for another aircraft. We were trying to reach her and she was trying to reach us. Then we heard 'XXX (short pause; 1 second maximum) climb to FL250.' I started a shallow climb and almost immediately had a contact on TCAS (10 mi scope) at less than 1000 ft. I climbed about 200-300 ft. We heard the controller telling someone to turn 180 degrees; there was a contact she was not talking to and I immediately started a descent to FL240. She then told the contact they could continue; the other contact was clear. She then called; 'XXX;' the student answered at FL240 and she asked us to identify. When we left her sector; she gave us a number to call for a possible 'flight deviation.' when I landed; I called the number and gave him this explanation. He stated the 2 aircraft had not closed inside the 5 mi bubble and that he anticipated no further investigation. The instructor for the student navigator told me later he had the crossing traffic visually.
Original NASA ASRS Text
Title: SBR-1 EXPERIENCES ENCOUNTER WITH OPPOSITE DIRECTION TRAFFIC WHEN RADIO COMMUNICATIONS WITH CENTER ARE COMPROMISED.
Narrative: ON A NAVY TRAINING FLT FOR NAVIGATOR TRAINING AT FL240 WAS ASSIGNED A NEW FREQ/CTLR. WE TRIED NUMEROUS TIMES; (APPROX 5 OR 6) TO CHK-IN ON UHF FREQ; STUDENT AT LEAST TWICE; THEN I TURNED SQUELCH OFF; STUDENT TRIED AGAIN; THEN I TRIED TWICE. WE HEARD THE CTLR SAY OUR CALL SIGN 3 OR 4 TIMES. SHE WAS VERY BUSY ON VHF FREQ AND OUR CALL WAS FOLLOWED BY INSTRUCTIONS FOR ANOTHER ACFT. WE WERE TRYING TO REACH HER AND SHE WAS TRYING TO REACH US. THEN WE HEARD 'XXX (SHORT PAUSE; 1 SECOND MAX) CLB TO FL250.' I STARTED A SHALLOW CLB AND ALMOST IMMEDIATELY HAD A CONTACT ON TCAS (10 MI SCOPE) AT LESS THAN 1000 FT. I CLBED ABOUT 200-300 FT. WE HEARD THE CTLR TELLING SOMEONE TO TURN 180 DEGS; THERE WAS A CONTACT SHE WAS NOT TALKING TO AND I IMMEDIATELY STARTED A DSCNT TO FL240. SHE THEN TOLD THE CONTACT THEY COULD CONTINUE; THE OTHER CONTACT WAS CLR. SHE THEN CALLED; 'XXX;' THE STUDENT ANSWERED AT FL240 AND SHE ASKED US TO IDENT. WHEN WE LEFT HER SECTOR; SHE GAVE US A NUMBER TO CALL FOR A POSSIBLE 'FLT DEVIATION.' WHEN I LANDED; I CALLED THE NUMBER AND GAVE HIM THIS EXPLANATION. HE STATED THE 2 ACFT HAD NOT CLOSED INSIDE THE 5 MI BUBBLE AND THAT HE ANTICIPATED NO FURTHER INVESTIGATION. THE INSTRUCTOR FOR THE STUDENT NAVIGATOR TOLD ME LATER HE HAD THE XING TFC VISUALLY.
Data retrieved from NASA's ASRS site as of May 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.