# SDR ASMF20161216004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 26, 2016
- Submitted: December 16, 2016
- Operation: Air carrier
- Aircraft: [N967AM](https://openairdocs.org/aircraft/N967AM), registered now
- Make and model: Boeing 787-8
- Registry model: [Boeing 787-8](https://openairdocs.org/model/boeing-787-8) (OpenAirDocs)
- Aircraft serial: 35312
- Aircraft time: 11,579 hours, 1,537 cycles
- Engine: GENX1B70P2
- System (JASC): [8300 · Accessory Gearboxes](https://openairdocs.org/jasc/8300)
- Part: Seal
- Part number: J1438P125
- Condition: Leaking
- Location: Gearbox
- Part time: 11,895 hours, 1,578 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASMF20161216004

## Discrepancy

DURING OVERNIGHT CHECK AND THE EO 8772004 ISSUED TO REPLACE THE TRANSFER GEARBOX (TGB) ON BOTH ENGINES, MAINTENANCE PERSONNEL DETECTED OIL LEAK IN RIGHT TGB SLEEVE; SO THE RIGHT TGB SLEEVE SEALS WERE REPLACED IAW AMM DMC-B787-A-G72-01-00A-520A-A AND TEST 4 PART POWER LEAK TEST WAS PERFORMED IAW AMM DMC-B787-A-G71-00-00-13A-364A-A, TESTED CORRECT.

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