# SDR ASAA2022072039153

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 20, 2022
- Submitted: July 22, 2022
- Operation: Air carrier
- Aircraft: [N915AK](https://openairdocs.org/aircraft/N915AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44080
- Aircraft time: 3,899 hours, 1,247 cycles
- System (JASC): [3440 · Independent Position Determining System](https://openairdocs.org/jasc/3440)
- Part: Drive Unit
- Part number: 8222130001
- Part serial: 4KL492
- Condition: Faulty
- Location: Nose Radome
- Part time: 3,915 hours, 1,255 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022072039153

## Discrepancy

WX RADAR IS WORKING INTERMITTENTLY. RED STREAK FROM A/C TO 10-11 O'CLOCK POSITION ON DISPLAY. GROUNDED - YES. PERFORMED WXR OPS TEST NORMAL, UNABLE DUPLICATE DISCREPANCY ON GROUND, FOR PRECAUTIONARY, REPLACED NEW ANTENNA DRIVE UNIT, PERFORMED INSTALLATION TEST GOOD B737-9 AMM 34-41-11/401.

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