# SDR 06012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 15, 2006
- Submitted: February 17, 2006
- Operation: Air carrier
- Aircraft: [N713CK](https://openairdocs.org/aircraft/N713CK), registered now
- Make and model: Boeing 747-2B4B
- Registry model: [Boeing 747-2B4B](https://openairdocs.org/model/boeing-747-2b4b) (OpenAirDocs)
- Aircraft serial: 21099
- Aircraft time: 65,065 hours, 17,302 cycles
- Engine: Pwa JT9D7J
- Engine time: 59,426 hours, 17,199 cycles
- System (JASC): [7261 · Turbine Engine Oil System](https://openairdocs.org/jasc/7261)
- Part: Engine
- Condition: Leaking
- Location: Nr 1
- Stage of operation: NR
- 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/06012

## Discrepancy

NR 1 ENG LOST OIL QTY 1 GAL, 1/2 HR SHUT ENG DOWN AT 0930Z WITH 1.25GAL REMAINING.  PERFORMED WINDMILLING ENG PROCEDURE AT 1000, 1030, 1050Z.  WINDMILLING OP 19 PSI TEMP 50 DEGREE C 1000Z QTY .5 GAL QTY IND 0 GAL AT 1025Z OP 21 PSI TEMP 40 DEGREE.  OP ONLY WENT TO ZERO AFTER A/C ON LANDING ROLL.  INSPECTED NR 1 ENG FOUND GEARBOX DRIVESHAFT HOUSING LEAKING AT ANGLE GEARBOX.  R/R`D D/S HOUSING O-RINGS IAW P&W E.M 72-00-67.  PERFORMED ENG WINDMILL INSPECTION IAW B747 MM 72-00-00.  REMOVED OIL FILTER AND FOUND FREE OF DEBRIS. INSTALLED NEW OIL FILTER IAW B747 MM 72-61-05. REMOVED CHIP DEL FOUND FREE OF DEBRIS AND REINSTALLED IAW 72-61-00.  SERVICED OIL SYS AND IDLE RAN ENG FOR LEAKS.  LEAK CHECKS GOOD.

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