# SDR UIEA2022081400859

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 2022
- Submitted: August 15, 2022
- Operation: Air carrier
- Aircraft: [N406KZ](https://openairdocs.org/aircraft/N406KZ), registered now
- Make and model: Boeing 747-4KZF
- Registry model: [Boeing 747-4KZF](https://openairdocs.org/model/boeing-747-4kzf) (OpenAirDocs)
- Aircraft serial: 36133
- Aircraft time: 49,702 hours, 9,664 cycles
- System (JASC): [7100 · Powerplant System](https://openairdocs.org/jasc/7100)
- Part: Engine
- Condition: Vibration
- Stage of operation: CL
- How discovered: O
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2022081400859

## Discrepancy

ENGINE 3 FAN VIBRATION 4.3 - 5.0 IN CLIMB(<P>PERFORMED BOROSCOPE INSPECTION AND TRIM BALANCE REF LOG PAGE 1194652 M5 & M6.</P> / <P>M5: PERFORMED #3 ENG BSI THEN OPS CHECK NORMAL AND RE-INSTALLED INSPECTION PORT (B1-0, B1-3, B4-3, B4-4, B4-2) AND N2 CRANK PAD THEN RUN UP LEAK CHECK NORMAL AS PER AMM 72-00-00 & 71-00-00.</P> / <P>M6: PERFORMED ECM 2022P-235. WEIGHT SCREW NOT MATCH WITH AVM. UPDATE AVM THEN PERFORMED #3 ENG TRIM BALANCE THEN VIB CHECK NORMAL (FAN VIB 1.3) AS PER AMM 72-31-00 & 71-00-00.</P>)

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