# SDR CALA2026100620165

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 1, 2026
- Submitted: October 6, 2026
- Operation: Air carrier
- Aircraft: [N37278](https://openairdocs.org/aircraft/N37278), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 61859
- Aircraft time: 13,240 hours, 4,505 cycles
- System (JASC): [3897 · Water/Waste System Wiring](https://openairdocs.org/jasc/3897)
- Part: Logic Card
- Part number: 1742F9
- Part serial: 32033
- Condition: Faulted
- Location: Zone 900
- Part time: 13,232 hours, 4,501 cycles
- Stage of operation: IN
- 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/CALA2026100620165

## Discrepancy

AFT LAV WASTE INDICATES ZERO AFTER FLT,  SEWAGE ODOR INFLIGHT, LAV INDICATORS ERONIOUS.   ACCOMPLISHED INSPECTION OF WASTE WATER TANK, NO ACTIVE LEAKS NOTED, SERVICED WASTE SYSTEM WITH NO DEFECTS. NO SEWAGE NOTED.   REMOVED AND REPLACED THE WASTE TANK LOGIC ASSY AND CLS SENSOR IAW AMM 38-33-03 AND AMM 38-33-02, OPS CHKD GOOD.

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