# SDR UIEA2023040300306

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 3, 2023
- Submitted: April 4, 2023
- Operation: Air carrier
- Aircraft: [N1997A](https://openairdocs.org/aircraft/N1997A), registered now
- Make and model: Boeing 767-33A
- Registry model: [Boeing 767-33A](https://openairdocs.org/model/boeing-767-33a) (OpenAirDocs)
- Aircraft serial: 27310
- Aircraft time: 103,933 hours, 22,049 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Unknown
- Condition: Unknown
- Location: Unknown
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2023040300306

## Discrepancy

ECM 2023P-168 N1997A ENG #1 ESN #702928 IS EXPERIENCING HIGH FAN VIBRATION. A TRIM BALANCE IS REQUIRED TSLV 10,240 CSLV 3,348.(<P>PERFORMED LH ENG RUN UP PER AMM 71-00-00. INCREASED N2 POWER TO 99% & FAN VIB DID NOT EXCEED 0.9. NO DISCREPANCY NOTED. OPS CHECK GOOD. </P>)

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