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Air carrier medium large transport in cruise at FL290 received a TCAS warning of traffic below converging. Traffic was cleared to FL280.
| Attributes | |
| ACN | 167881 |
| Time | |
| Date | 199101 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : rdu |
| State Reference | NC |
| Altitude | msl bound lower : 28000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute airway : j209 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Fighter |
| Flight Phase | climbout : intermediate altitude |
| 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 : 18000 flight time type : 6000 |
| ASRS Report | 167881 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | none taken : unable |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | vertical : 1000 |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
TCAS corrective climb audio and vsi indication of 3000' minimum by green area on vsi. Then followed by radio altimeter blip on display directly below our aircraft. Called center to determine if good indication. Advised fgt traffic climbing below us to FL280. No previous advisory by center given to crew.
Original NASA ASRS Text
Title: ACR MLG IN CRUISE AT FL290 RECEIVED A TCAS WARNING OF TRAFFIC BELOW CONVERGING. TRAFFIC WAS CLEARED TO FL280.
Narrative: TCAS CORRECTIVE CLB AUDIO AND VSI INDICATION OF 3000' MINIMUM BY GREEN AREA ON VSI. THEN FOLLOWED BY RADIO ALTIMETER BLIP ON DISPLAY DIRECTLY BELOW OUR ACFT. CALLED CENTER TO DETERMINE IF GOOD INDICATION. ADVISED FGT TFC CLBING BELOW US TO FL280. NO PREVIOUS ADVISORY BY CENTER GIVEN TO CREW.
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.