# SDR 97ZZZM689

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 28, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N573CA](https://openairdocs.org/aircraft/N573CA), registered now
- Make and model: Boeing 757-23APF
- Registry model: [Boeing 757-23APF](https://openairdocs.org/model/boeing-757-23apf) (OpenAirDocs)
- Aircraft serial: 24971
- Engine: Rroyce RB211535E4
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Fuel Control
- Condition: Out Of Adjust
- Location: Nr 1 Engine
- Stage of operation: CR
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZM689

## Discrepancy

KMIA-GUA - FLT 47 - DURING CRUISE, NR 1 ENGINE EXPERIENCED HIGH VIBRATION (2.4) ENG WAS THROTTLED BACK TO IDLE AND A/C PERFORMED AN AIR RETURN INTO KMIA.  ON GROUND AT KMIA MAINTENANCE PERFORMED A TRIM BALANCE PER 71-00-00 TEST 7, MAX VIBRATION 0.5.  AIRCRAFT RETURNED TO SERVICE.  (M)

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