# SDR CA150525016

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 14, 2015
- Submitted: August 5, 2015
- Operation: General aviation
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Spring
- Condition: Failed
- Location: Starter Gen
- Component: Starter Gen
- Component part number: 11524005
- Stage of operation: NR
- How discovered: O
- Nature of condition: M
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA150525016

## Discrepancy

(CAN) APU FAIL CAUTION LIGHT ILLUMINATED DURING START ATTEMPT.  APU WILL NOT START.  APU STARTER GENERATOR REPLACED & APU STARTED OKAY.  DURING SHOP TEAR DOWN INSPECTION OF THE STARTER GEN SHORTING & BURNING FOUND IN SPRING HOLDER & SPRING BRUSH LEADS RESULTING IN DISINTEGRATION OF THESE PARTS.  SEE PICTURES ATTACHED SHOWING THE DRY CARBON OIL & SALTS ACCUMULATION, POSSIBLY FROM DRIED DEICE FLUID.

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