# SDR CA120502013

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 30, 2012
- Submitted: September 14, 2015
- Operation: General aviation
- Make and model: Dhav DHC7100
- Engine: Pwa PT6A50
- Propeller: Hamstd 24PF305
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Housing
- Part number: 160184100
- Condition: Cracked
- Location: Combustor
- Part time: 2,373 hours
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA120502013

## Discrepancy

(CAN) DURING THE ROUTINE SSI INSPECTION OF THE APU MOUNT AND STRUCTURE, IT WAS NOTICED THAT THE APU, PN 160371-201, SN 897402, HAD A SIGNIFICANT JAGGED CRACK ON THE FWD FACE OF THE COMBUSTION HOUSING, PN 160184-100, AFT OF THE V-BAND CLAMP WHICH SECURES THE COMBUSTOR TO THE GEARBOX/IMPELLER ASSY.  UPON REMOVAL OF THE APU WE NOTICED THAT THE CRACK WAS ACTUALLY A SERIES OF CRACK EXTENDING ALMOST ALL OF THE WAY AROUND THE APU.   ALSO AN ADDITIONAL CRACK ABOUT 6-7" LONG WAS FOUND BESIDE THE ORIGINAL CRACK.  THE APU WAS REMOVED FROM SERVICE.

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