# SDR SWAA2022120176793

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 29, 2022
- Submitted: December 1, 2022
- Operation: Air carrier
- Aircraft: [N964WN](https://openairdocs.org/aircraft/N964WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36965
- Aircraft time: 36,716 hours, 22,514 cycles
- Engine: Cfmint CFM567B242
- System (JASC): [7397 · Engine Fuel System Wiring](https://openairdocs.org/jasc/7397)
- Part: Wire Harness
- Part number: 3250257020
- Part serial: BN307933
- Condition: Leaking
- Location: Zn 400 Nacelle/P
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2022120176793

## Discrepancy

JUST AFTER LEVEL OFF, AT CRUISE, RECEIVED A ZERO OIL PRESSURE INDICATION ON THE NR 1 ENGINE, RETURNED TO DEN, ALL OTHER ENGINE INDICATIONS WERE NORMAL, EEC 1 FAULT CODE 79-11091 PRESENT ON FLIGHT LEG 0 & 1.  REMOVED AND REPLACED J7 AND J8 FAN WIRING HARNESS' IAW AMM 73-21-06.  R&R THE NR 1 ENG OIL PRESSURE SENSOR IAW MM 79-32-01, COMPLETED THROUGH PARA H.   COMPLETED THE INSTALLATION OF THE NR 1 ENG OIL PRESSURE SENSOR IAW AMM 79-32-01. COMPLETED IDLE LEAK CHECK AND TAKE OFF POWER ASSURANCE TEST IAW EA 22-179-03514. LEAK CHECKED AND OPS TESTED GOOD.

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