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Md-83 captain reported that only the TA function of the TCAS system was operational and requested clearance into non-rvsm airspace.
| Attributes | |
| ACN | 1338091 |
| Time | |
| Date | 201603 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | MD-83 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Traffic Collision Avoidance System (TCAS) |
| Person 1 | |
| Function | Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | ATC Issue All Types Aircraft Equipment Problem Less Severe Deviation - Procedural FAR Deviation - Procedural Published Material / Policy |
Narrative:
About half way into our flight; the vsi was showing 'TA only'. I asked the pilot monitoring (pm) to inform ATC that only the TA function of our TCAS system was operational; and could they descend us into non-rvsm airspace. ATC said; that's okay; we have you on radar. At this point; the 'TA only' message was gone; so the pm did not say anything further to ATC about the TCAS being a company requirement for rvsm operations. About 10 minutes later the 'TA only' message reappeared; and I now requested to descend to FL280. Shortly after leveling at FL280; the 'TA only' message disappeared.
Original NASA ASRS Text
Title: MD-83 Captain reported that only the TA function of the TCAS system was operational and requested clearance into non-RVSM airspace.
Narrative: About half way into our flight; the VSI was showing 'TA only'. I asked the Pilot Monitoring (PM) to inform ATC that only the TA function of our TCAS system was operational; and could they descend us into non-RVSM airspace. ATC said; that's okay; we have you on radar. At this point; the 'TA only' message was gone; so the PM did not say anything further to ATC about the TCAS being a company requirement for RVSM operations. About 10 minutes later the 'TA only' message reappeared; and I now requested to descend to FL280. Shortly after leveling at FL280; the 'TA only' message disappeared.
Data retrieved from NASA's ASRS site 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.