# SDR ASAA2019041529013

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 15, 2019
- Submitted: April 17, 2019
- Operation: Air carrier
- Aircraft: [N594AS](https://openairdocs.org/aircraft/N594AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35191
- Aircraft time: 42,077 hours, 12,613 cycles
- System (JASC): [3442 · Weather Radar System](https://openairdocs.org/jasc/3442)
- Part: Radar
- Condition: Malfunctioned
- Location: Weather
- Stage of operation: CR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019041529013

## Discrepancy

WEATHER RADAR IN AUTO WX+T AND WX MODES IS GENERATING A FALSE WEATHER RETURN ON BOTH ND'S AT A 070 BEARING APPROX 5 NM FROM AIRCRAFT. FALSE RETURN IS APPROX 2 MILES IN DIAMETER, MOSTLY GREEN WITH SOME MAGENTA. PROBLEM DISAPPEARED DURING DESCENT FROM CRUISE FLIGHT. GROUNDED - YES. PERFORMED B737-800 FIM 34-43 TASK 801, BITE PROC. CHECKED GOOD. NO FAULT NOTED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.