# SDR HNAA2010082600188

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 10, 2010
- Submitted: August 26, 2010
- Operation: Air carrier
- Aircraft: N343EN
- Make and model: Dhav DHC8103
- Aircraft serial: 340
- Aircraft time: 36,973 hours, 43,899 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Pressure Switch
- Condition: Failed
- Location: Nr 1 Bleed
- Stage of operation: CL
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HNAA2010082600188

## Discrepancy

EXPERIENCED ENGINE SURGE ON NR 1 AND 2 ENGINE OF 8 TO 10 PERCENT TORQUE DURING CLIMBOUT,AFTER SELECTING NR 1 ENGINE BLEED OFF, ENGINE OPPS NORMAL, SURGE RETURNS IF NR 1 BLEED IS SELECTED ON.  R & R BOTH NR 1 HIGH PRESSURE SWITCHES. REF DASH8 MM 21-11-21.  OPS CK GOOD AT THIS TIME.

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