# SDR CBR2006F00004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 17, 2006
- Submitted: May 11, 2006
- Operation: Air carrier
- Aircraft: N288DH
- Make and model: Dhav DHC8106
- Aircraft serial: 317
- Engine: Pwa PW121
- System (JASC): [6120 · Propeller Controlling System](https://openairdocs.org/jasc/6120)
- Part: Pcu
- Part number: 78249050
- Part serial: 921155
- Condition: Malfunctioned
- Location: Nr 2 Engine
- Stage of operation: TO
- How discovered: O
- Nature of condition: E
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CBR2006F00004

## Discrepancy

IMMEDIATELY AFTER TAKEOFF, NR 2 ENGINE BEGAN RAPID TORQUE FLUCTUATIONS TOWARDS MAX TORQUE LIMITS.  FROM THE CABIN, MECHANICS OBSERVED PROP.  PITCH FLUCTUATIONS. ENGINE NR 2 WAS PRECAUTIONARY SHUTDOWN.  AFTER TROUBLESHOOTING REMOVED AND REPLACED NR 2 ENGINE PCU IAW.  OPS CHECK SATISFACTORY. RIL ACCOMPLISHED.  (K)

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