# SDR 2010FA0000834

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 9, 2010
- Submitted: August 18, 2010
- Operation: General aviation
- Aircraft: [N456AL](https://openairdocs.org/aircraft/N456AL), registered now
- Make and model: Gulstm G1159A
- Aircraft serial: 405
- Aircraft time: 9,384 hours, 5,253 cycles
- System (JASC): [4950 · APU Bleed Air System](https://openairdocs.org/jasc/4950)
- Part: Duct
- Part number: 1159AC2005563
- Condition: Damaged
- Location: Apu Bleed Air
- 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/2010FA0000834

## Discrepancy

DURING POST FLIGHT INSP WITH THE APU RUNNING AND BLEED AIR SELECTED ON, IT WAS NOTED THAT THERE WAS A HOLE IN THE INSULATION OF THE APU AND GROUND START DUCT, AND BLEED AIR FELT TO BE ESCAPING.  FURTHER INVESTIGATION FOUND THAT A TWO (2) INCH CRACK HAD DEVELOPED IN THE WELDED SEAM AT THE "Y" SECTION OF THE APU AND GROUND START DUCT.

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