# SDR A6WA200940811

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 15, 2009
- Submitted: January 8, 2010
- Operation: Air carrier
- Aircraft: [N427ZW](https://openairdocs.org/aircraft/N427ZW), registered now
- Make and model: Cndair CL6002B19
- Aircraft serial: 7685
- Aircraft time: 17,046 hours, 15,750 cycles
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Fan
- Condition: Vibration
- Location: Heat Exchanger
- Component: Heat Exchanger
- Component part number: 7533559
- Stage of operation: CL
- How discovered: O
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/A6WA200940811

## Discrepancy

AFTER TAKEOFF AND GEAR RETRACTION, HEARD PULSATING NOISE AND FELT PULSATING THROUGH RUDDER PEDALS, AFTER GEAR EXTENSION PULSATING SUBSIDED.  R & R HEAT EXCHANGER DUE TO EXCESSIVE VIB FAN TO HSG LEAK CKD GOOD IAW AMM 27-11-42.  INSP A/C FOUND NO OTHER DEFECTS.  (K)

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