# SDR AXI2002F00002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 15, 2002
- Submitted: April 15, 2002
- Operation: Air carrier
- Aircraft: N1881Q
- Make and model: Amd FALCON20
- Aircraft serial: 414
- Engine: Garrtt TFE7312B
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Shaft
- Part number: 36B510419G1
- Condition: Broken
- Location: Apu Starter/Gen
- Part time: 30 cycles
- 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/AXI2002F00002

## Discrepancy

STARTER GENERATOR SPLINE SHAFT (PN 36B50419G1) INSTALLED IN STARTER GENERATOR (PN 2CM308C3) SHEARED AT THE BASE OF THE INTERNAL SPLINE AFTER ABOUT 30 START CYCLES.  IT IS OUR OPINION THAT THE HOLE, WHICH IS DRILLED AND TAPED TO ACCEPT THE RETAINING SCREW IS BEING DRILLED TO DEEP AND IS THE CAUSE OF THE SHAFT FAILURES.

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