# SDR CWQR20130408028

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 8, 2013
- Submitted: April 9, 2013
- Operation: General aviation
- Aircraft: N381QS
- Make and model: Cessna 680CE
- Aircraft serial: 6800097
- Aircraft time: 5,316 hours
- Engine: Pwc PW306C
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Heat Exchanger
- Part number: 99145222
- Part serial: S4883T0172
- Condition: Cracked
- Location: Zone 400
- 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/CWQR20130408028

## Discrepancy

DURING A SCHEDULED INSPECTION, NOTICED HEAT EXCHANGER SIDE PLATE HAD 3.  35" LONG CRACK AND THE OPPOSITE SIDE WAS ALSO CRACKED IN ONE CORNER.  WE PERFORMED A LEAK DOWN TEST OF THE DEFECTIVE HEAT EXCHANGER AND FOUND THAT THE CRACK EXTENDED INTO THE INTERNAL PORTION OF THE EXCHANGER IN THE COOLING FIN AREAS.

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