# SDR MDR03024

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 12, 2003
- Submitted: December 11, 2003
- Operation: Air carrier
- Aircraft: [N179AC](https://openairdocs.org/aircraft/N179AC), registered now
- Make and model: Skrsky S64F
- Aircraft serial: 64091
- Engine: Pwa JFTD12A4A
- System (JASC): [5302 · Rotorcraft Tail Boom](https://openairdocs.org/jasc/5302)
- Part: Fitting
- Part number: 642066345101
- Condition: Cracked
- Location: T/R Gearbox
- Part time: 8,212 hours, 6,160 cycles
- 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/MDR03024

## Discrepancy

UPON POST-FLIGHT INSPECTION, FIELD MAINTENANCE PERSONNEL DISCOVERED THE LOWER FITTING TGB, PN 6420-66345-101, CRACKED AT THE AFT LOWER LEFT-HAND CORNER.  THE CRACK IS APPROXIAMTELY .5000 INCH IN LENGTH AND TRAVELS THROUGH THE THICK WEB AND TURNS TOWARDS THE LOWER LEFT-HAND BARREL NUT RECESS OF THE TAIL GEARBOX FITTING (UPPER).  CAUSE: UNKNOWN

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