 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Air carrier aircraft received TCASII RA after ATC controller approved descent of 1 aircraft to a lower altitude. The controller subsequently issued diverging turns to both aircraft.
| Attributes | |
| ACN | 246777 |
| Time | |
| Date | 199307 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : tyi |
| State Reference | NC |
| Altitude | msl bound lower : 31000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 20000 flight time type : 2000 |
| ASRS Report | 246777 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : instrument pilot : commercial |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 30000 vertical : 700 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Deviation east for WX was approved approximately 30 mi south of tyi at FL330. Approximately 11 mi east, the new controller on 132.22 descended us to FL310 and would not approve direct hpw. We turned left to tyi and then proceeded direct to hpw as filed. Approximately 20-30 mi north of tyi, we received a TCASII TA, traffic at 10 O'clock, same altitude, sbound. New controller on 120.37 gave immediate diverging turns to both aircraft (other flight was air carrier Y in holding pattern). Air carrier Y captain said he received an RA and took evasive action.
Original NASA ASRS Text
Title: ACR ACFT RECEIVED TCASII RA AFTER ATC CTLR APPROVED DSCNT OF 1 ACFT TO A LOWER ALT. THE CTLR SUBSEQUENTLY ISSUED DIVERGING TURNS TO BOTH ACFT.
Narrative: DEV E FOR WX WAS APPROVED APPROX 30 MI S OF TYI AT FL330. APPROX 11 MI E, THE NEW CTLR ON 132.22 DSNDED US TO FL310 AND WOULD NOT APPROVE DIRECT HPW. WE TURNED L TO TYI AND THEN PROCEEDED DIRECT TO HPW AS FILED. APPROX 20-30 MI N OF TYI, WE RECEIVED A TCASII TA, TFC AT 10 O'CLOCK, SAME ALT, SBOUND. NEW CTLR ON 120.37 GAVE IMMEDIATE DIVERGING TURNS TO BOTH ACFT (OTHER FLT WAS ACR Y IN HOLDING PATTERN). ACR Y CAPT SAID HE RECEIVED AN RA AND TOOK EVASIVE ACTION.
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.