# SDR CWQR20130220010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 20, 2013
- Submitted: March 8, 2013
- Operation: General aviation
- Aircraft: [N396QS](https://openairdocs.org/aircraft/N396QS), registered now
- Make and model: Cessna 680CE
- Aircraft serial: 6800240
- Aircraft time: 3,881 hours
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Heat Exchanger
- Part number: 99145222
- Part serial: S4883T0489
- Condition: Cracked
- Location: Bleed Sys
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CWQR20130220010

## Discrepancy

DURING A SCHEDULED PRODUCT IMPROVEMENT (REPLACED DUCT ASSY 6914070-67)   NOTICED THE LT HEAT EXCHANGER SIDE PLATE HAD A .35 INCH LONG CRACK AND THE OPPOSITE SIDE WAS CRACKED IN TWO PLACES.  PREFORMED A LEAK CHECK OF THE HEAT EXCHANGER AND FOUND LEAKS NOT ONLY FROM THE VISABLE CRACKS, BUT ALSO LEAKS INTERNAL TO THE HEAT EXCHANGER IN THE COOLING FIN AREA.  REPLACED WITH A NEW HEAT EXCHANGER.

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