# SDR ASAA2021090235860

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 2, 2021
- Submitted: September 7, 2021
- Operation: Air carrier
- Aircraft: [N468AS](https://openairdocs.org/aircraft/N468AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41735
- Aircraft time: 26,771 hours, 8,604 cycles
- System (JASC): [3442 · Weather Radar System](https://openairdocs.org/jasc/3442)
- Part: Drive Unit
- Part number: 6225135822
- Part serial: 18RXV2
- Condition: Intermittent
- Location: Wx Radar Antenna
- Part time: 34,186 hours, 9,952 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021090235860

## Discrepancy

WXR FAIL, PWS FAIL, ANT AMBER WARNINGS ON NAVIGATION DISPLAYS. GROUNDED - YES. CONFIRMED ANT AND PWS FAIL INTERMITTENTLY DURING WX TEST. REMOVED AND REPLACED WXR ANTENNA DRIVE UNIT REF AMM 34-43-11. OPS CHECKS GOOD. GROUND VERIFICATION GOOD.

---
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.