# SDR P5CA2023082800081

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 27, 2023
- Submitted: August 28, 2023
- Operation: Air carrier
- Aircraft: [N714SA](https://openairdocs.org/aircraft/N714SA), registered now
- Make and model: Boeing 777FZB
- Registry model: [Boeing 777FZB](https://openairdocs.org/model/boeing-777fzb) (OpenAirDocs)
- Aircraft serial: 37988
- Aircraft time: 57,329 hours, 6,369 cycles
- System (JASC): [7700 · Engine Indicating System](https://openairdocs.org/jasc/7700)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: CR
- How discovered: O
- Nature of condition: E, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/P5CA2023082800081

## Discrepancy

DURING CRUISE FLT LVL 320 SECONDARY ENGINE INDICATIONS APPEARED. INVERSE READING OF 4.0 ON LH ENG N1 VIBRATION. REPEATED SEVERAL TIMES(<P>PERFORMED #1 ENG BALANCE SOLUTION IAW B777 AMM 71-00-00 TEST 12B, ALL WEIGHTS IN SPINNER SHOW POSITION 1. MAT SOLUTION SHOWS CHANGE WEIGHT POSITION 20, 28, 29, AND 37 TO ALL P12 WEIGHTS. INSTALLED WEIGHTS IN POSITIONS LISTED . AFTER CHANGING WEIGHTS TO MAT SOLUTION WEIGHTS. PERFORMED LOW PRESS SYS VIBE SURVEY IAW B777 AMM 71-00-00 TEST 10, ENGINE WITHIN LIMITS </P>)

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