# SDR ASAA2021102136389

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 21, 2021
- Submitted: October 26, 2021
- Operation: Air carrier
- Aircraft: [N518AS](https://openairdocs.org/aircraft/N518AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35693
- Aircraft time: 46,332 hours, 13,652 cycles
- System (JASC): [3440 · Independent Position Determining System](https://openairdocs.org/jasc/3440)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: NR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021102136389

## Discrepancy

FOS' RADAR DISPLAY DOES NOT DISPLAY CORRECTLY IN AUTO / WXTX OR WX. RADAR PAINTS AS IF IT IS IN MANUAL TILT AT -2 -3 DEGREES DOWN AND APPEARS TO BE GROUND MAPPING. WHEN TAKEN OUT OF AUTO DISPLAYS MATCH ON CA+FO ND. GROUNDED - YES. PERFORMED B737-800 FIM 34-43 TASK 801 WXR BITE SHOWS NO FAULTS. PERFORMED WXR SYSTEM OPS TEST REF B737-800 AMM 34-43-00-710-802-001. ALL TEST PASS NO HISTORY IN TRAX LAST 90 DAYS.

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