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A B737-800 crew reported a TCAS null bus fault with a descend then climb command at 3;300 ft while being vector crosswind to final.
| Attributes | |
| ACN | 1033368 |
| Time | |
| Date | 201208 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Route In Use | Visual Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | TCAS Equipment |
| Person 1 | |
| Function | Pilot Flying First Officer |
| Qualification | Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) |
| Experience | Air Traffic Control Military 20 Air Traffic Control Radar 20 Air Traffic Control Supervisory 10 Flight Crew Last 90 Days 29 Flight Crew Total 14000 Flight Crew Type 6590 |
| Person 2 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 161 Flight Crew Total 17000 Flight Crew Type 1656 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Had a phantom TA followed by a RA. All were phantom and required a descent and then a climb on final. Finally for sure it was fake and we just had to fly with it on. It went away at 1;500 ft or so.
Original NASA ASRS Text
Title: A B737-800 crew reported a TCAS null bus fault with a DESCEND then CLIMB command at 3;300 FT while being vector crosswind to final.
Narrative: Had a phantom TA followed by a RA. All were phantom and required a descent and then a climb on final. Finally for sure it was fake and we just had to fly with it on. It went away at 1;500 FT or so.
Data retrieved from NASA's ASRS site as of July 2013 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.