# SDR P5CA2021022200048

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 21, 2021
- Submitted: February 24, 2021
- Operation: Air carrier
- Aircraft: [N857GT](https://openairdocs.org/aircraft/N857GT), registered now
- Make and model: Boeing 747-87UF
- Registry model: [Boeing 747-87UF](https://openairdocs.org/model/boeing-747-87uf) (OpenAirDocs)
- Aircraft serial: 37568
- Aircraft time: 40,049 hours, 6,408 cycles
- Engine: Ge GENX1B54
- System (JASC): [7261 · Turbine Engine Oil System](https://openairdocs.org/jasc/7261)
- Part: Tube
- Part number: 2487M09G01
- Condition: Cracked
- Location: Oil Supply
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/P5CA2021022200048

## Discrepancy

NUMBER 4 ENGINE OIL SYS STATUS MESSAGE, PRECAUTIONARY SHUTDOWN OF NR 4 ENG PER QRH. M12 - DURING A/C BACK TO GATE W/ REGARDS TO ENG NR 4 OIL SYS STATUS MSG FOUND OIL CAP NOT INSTALLED PROPERLY.  (PERFORMED PRECAUTIONARY INSPECTION OF NR 4 ENG FUEL OIL HEAT EXCHANGER, FOUND OIL SUPPLY LINE CRACKED.  REMOVED AND REPLACED OIL SUPPLY LINE, LEAK CHECK GOOD PER AMM 79-21-01.  PERFORMED ENGINE RUN IAW B747 AMM 71-00-00.  ENGINE OPERATION NORMAL.  PERFORMED ENGINE WIND MILLING INSPECTION IAW B747 AMM 71-00-00-200-806-G00.  NO DEFECTS NOTED.  LP 1488143 - M12: CHECKED OIL CAP, NO ABNORMALITIES.  SECURED OIL CAP AND CHECKED OK PER AMM 12-13-03/301.)

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