# SDR DXTA2026050607904

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 3, 2026
- Submitted: May 6, 2026
- Operation: Air carrier
- Aircraft: [N124QS](https://openairdocs.org/aircraft/N124QS), registered now
- Make and model: Bombdr BD7001A11
- Aircraft serial: 60080
- Aircraft time: 2,901 hours, 1,248 cycles
- System (JASC): [7930 · Engine Oil Indicating System](https://openairdocs.org/jasc/7930)
- Part: Pressure Switch
- Part number: 21SN04472
- Part serial: AD01664
- Condition: Failed
- Location: Zone 400
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2026050607904

## Discrepancy

DURING TAKEOFF ROLL, AFTER APPLYING TAKEOFF POWER, BLUE CAS MESSAGE: L OIL FILTER MESSAGE ILLUMINATED.  INITIATED ABORT. WHEN THROTTLES RETARDED, MESSAGE DISAPPEARED.  REMOVED LT ENGINE DIFFERENTIAL PRESSURE SWITCH, AND INSTALLED INSPECTED TESTED PART. PERFORMED SATISFACTORY OPS TEST OF LT ENGINE OIL DP SWITCH & SATISFACTORY LEAK CHECK. RUN SYSTEM FOR 30 MINUTES WITH NO FAULT INDICATED ALL WORK IAW EMM 79-34-01.

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