# SDR 99ZZZM805

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 6, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N757NA](https://openairdocs.org/aircraft/N757NA), registered now
- Make and model: Boeing 757-23A
- Registry model: [Boeing 757-23A](https://openairdocs.org/model/boeing-757-23a) (OpenAirDocs)
- Aircraft serial: 24567
- Engine: Rroyce RB211535E4
- System (JASC): [7530 · Compressor Bleed Control](https://openairdocs.org/jasc/7530)
- Part: Control
- Part number: C8E389
- Condition: Failed
- Location: Nr 1 Engine
- Stage of operation: CL
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZM805

## Discrepancy

DURING TRANSITION FROM HIGH CLIMB POWER TO CRUISE POWER LT ENGINE APPEARED TO SURGE.  ALL ENGINE INDICATIONS WERE NORMAL PRIOR TO AND AFTER SURGE EVENT.  REMOVED BLVL CONTROL C8E38-9 AND INSTALLED BLVL CONTROL C8E38-12, OPERATIONAL CHECK NORMAL.  (M)

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