# SDR CALA2026081918731

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 18, 2026
- Submitted: August 20, 2026
- Operation: Air carrier
- Aircraft: [N69830](https://openairdocs.org/aircraft/N69830), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 44560
- Aircraft time: 37,984 hours, 14,073 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [2800 · Aircraft Fuel System](https://openairdocs.org/jasc/2800)
- Part: Check Valve
- Condition: Contaminated
- Location: Fuel Sys
- Stage of operation: NR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026081918731

## Discrepancy

TECH SUPPORT UPDATE ON A LEVEL C REPEAT CHRONIC NGS DEGRADED W/PRIOR HISTORY OF A 63 FAULT ASM FAULTING BUT LOW HIGH FLOW TEST OK AND W/ASM NEWER STYLE AND FAIRLY LOW HRS 14K.   FOUND NO SIGNS OR ODORS OF FUEL. R & R NGS OXY SENSOR IAW AMM 47-42-03/401. ELEC & SYS TEST PASSED.   AFTER INSPECTION FOR FUEL CONTAMINATION OF CHECK VALVE, SECURED AND TORQUED THE CHECK VALVE IAW AMM 47-21-04.

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