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An air carrier flight receives and acts upon a TCASII RA to avoid a descending F15 in emergency descent.
| Attributes | |
| ACN | 435666 |
| Time | |
| Date | 199904 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : gup.vortac |
| State Reference | NM |
| Altitude | msl bound lower : 31000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zab.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zab.artcc |
| Operator | other |
| Make Model Name | Eagle (F-15) |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : cfi |
| Experience | flight time last 90 days : 100 flight time total : 10000 |
| ASRS Report | 435666 |
| Person 2 | |
| Affiliation | government : military |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude conflict : airborne less severe |
| Independent Detector | aircraft equipment : tcas other controllera |
| Resolutory Action | controller : issued alert flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 2500 vertical : 500 |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Received TCASII TA at FL330. ATC instructed us to turn left 30 degrees. Next received RA to descend. We followed TCASII command bars and observed F15 in trouble from left to right descending through our previous altitude. Later we called ZAB supervisor and he confirmed that the F15 declared emergency and had to descend from FL390 to lower altitude. TCASII worked normally and no one hurt. We descended to FL310 and after RA climbed back to FL330. Operations normal.
Original NASA ASRS Text
Title: AN ACR FLT RECEIVES AND ACTS UPON A TCASII RA TO AVOID A DSNDING F15 IN EMER DSCNT.
Narrative: RECEIVED TCASII TA AT FL330. ATC INSTRUCTED US TO TURN L 30 DEGS. NEXT RECEIVED RA TO DSND. WE FOLLOWED TCASII COMMAND BARS AND OBSERVED F15 IN TROUBLE FROM L TO R DSNDING THROUGH OUR PREVIOUS ALT. LATER WE CALLED ZAB SUPVR AND HE CONFIRMED THAT THE F15 DECLARED EMER AND HAD TO DSND FROM FL390 TO LOWER ALT. TCASII WORKED NORMALLY AND NO ONE HURT. WE DSNDED TO FL310 AND AFTER RA CLBED BACK TO FL330. OPS NORMAL.
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.