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Evasive action descent after TCASII RA received by air carrier medium large transport crew. Radio communication problem hinted.
| Attributes | |
| ACN | 252074 |
| Time | |
| Date | 199309 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : mcn |
| State Reference | GA |
| Altitude | msl bound lower : 32600 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Military Transport |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 200 flight time total : 3500 flight time type : 900 |
| ASRS Report | 252074 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : clearance non adherence : far non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 6000 vertical : 1500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On sep/sun/93 I was the first officer on flight dfw to sav. In the vicinity of mcn VOR at FL330 we observed an RA on TCASII. We descended approximately 400 ft and returned to FL330 when clear of conflict. The other airplane passed approximately 1500 ft above and 1 mi north of us. When we first tried to contact ZTL we were unable. After a couple of mins we were able to contact them and they informed us that they had been trying to contact us to give us a descent to FL310. They asked us if we had any knowledge of a radio failure on our part and we said no. After landing the captain was told to contact ZTL on the phone that night or the next morning. At this time I don't know what was said between the captain and center but the captain told me he would call me if he found out anything more.
Original NASA ASRS Text
Title: EVASIVE ACTION DSCNT AFTER TCASII RA RECEIVED BY ACR MLG CREW. RADIO COM PROB HINTED.
Narrative: ON SEP/SUN/93 I WAS THE FO ON FLT DFW TO SAV. IN THE VICINITY OF MCN VOR AT FL330 WE OBSERVED AN RA ON TCASII. WE DSNDED APPROX 400 FT AND RETURNED TO FL330 WHEN CLR OF CONFLICT. THE OTHER AIRPLANE PASSED APPROX 1500 FT ABOVE AND 1 MI N OF US. WHEN WE FIRST TRIED TO CONTACT ZTL WE WERE UNABLE. AFTER A COUPLE OF MINS WE WERE ABLE TO CONTACT THEM AND THEY INFORMED US THAT THEY HAD BEEN TRYING TO CONTACT US TO GIVE US A DSCNT TO FL310. THEY ASKED US IF WE HAD ANY KNOWLEDGE OF A RADIO FAILURE ON OUR PART AND WE SAID NO. AFTER LNDG THE CAPT WAS TOLD TO CONTACT ZTL ON THE PHONE THAT NIGHT OR THE NEXT MORNING. AT THIS TIME I DON'T KNOW WHAT WAS SAID BTWN THE CAPT AND CTR BUT THE CAPT TOLD ME HE WOULD CALL ME IF HE FOUND OUT ANYTHING MORE.
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.