# SDR ZKFR201112223218A

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 22, 2011
- Submitted: December 28, 2011
- Operation: General aviation
- Aircraft: [N78KN](https://openairdocs.org/aircraft/N78KN), registered now
- Make and model: Hawbee 4000
- Aircraft serial: 6983
- Aircraft time: 430 hours
- System (JASC): [3810 · Potable Water System](https://openairdocs.org/jasc/3810)
- Part: Check Valve
- Part number: 4E42861
- Part serial: N0819003
- Condition: Faulty
- Location: Potable Water
- Part time: 698 hours, 430 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/ZKFR201112223218A

## Discrepancy

POTABLE WATER IN LAV HAS LOW PRESSURE AND PUMP CONTINUOUSLY CYCLES.   R & R DRAIN CHECK VALVE.  OPS CHECKED GOOD.  INSPECTED CHECK VALVE ON BENCH AND FOUND VALVE NOT COMPLETELY CLOSING AND REQUIRING EXCESSIVE PRESSURE TO CLOSE AT ALL.

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