# SDR ASAA201808205816

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 15, 2018
- Submitted: August 20, 2018
- Operation: Air carrier
- Aircraft: [N587AS](https://openairdocs.org/aircraft/N587AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35684
- Aircraft time: 41,446 hours, 12,104 cycles
- System (JASC): [3442 · Weather Radar System](https://openairdocs.org/jasc/3442)
- Part: Drive Unit
- Part number: 6225135822
- Part serial: 18YHR4
- Condition: Vibration
- Location: Wx Radar Sys
- Part time: 23,539 hours, 6,806 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA201808205816

## Discrepancy

WHEN WEATHER RADAR IS ON  IN WX-T AUTO MODE,   A VIBRATION COULD BE FELT IN COCKPIT FLOOR EVERY 10 - 15 SECONDS LASTING 2-3 SECONDS IN DURATION. VIBRATION GONE WITH WXR RADAR OFF. ACFT GROUNDED. REPLACED THE WX RADAR ANTENNA DRIVE UNIT. ALL OPS NORMAL IAW AMM 34-43-11, AND 34-43-00.

---
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.