# SDR TX22003F00000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 15, 2003
- Submitted: May 5, 2003
- Operation: Air carrier
- Aircraft: [N108MS](https://openairdocs.org/aircraft/N108MS), registered now
- Make and model: Boeing 737100
- Aircraft serial: 33102
- Engine: Ge CFM56*
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Starter
- Part number: 1152426245
- Condition: Failed
- Location: Apu
- Part time: 27 hours
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TX22003F00000

## Discrepancy

NPRM STATES TO REMOVE PART NUMBERS AND SERIES NUMBER AND REPLACE THESE ITEMS WITH A SERIES 7 OR GREATER.  THE SERIES 7 UNIT WHEN INSTALLED FAILED.  WHEN AN APU START WAS ATTEMPTED USING A SERIES 7 START CONVERTER UNIT.  THE NEW UNIT EXPERIENCED A COMPLETE ELECTRICAL FAILURE.

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