# SDR 99ZZZX2450

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 26, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Filed by: [Hamilton Sundstrand World Wide Repair, repair station SI3R842L](https://openairdocs.org/faa-repair-station/SI3R842L/hamilton-sundstrand-world-wide-repair.md) (OpenAirDocs)
- Aircraft: N110PX
- Make and model: Saab SF340A
- Registry model: [Saab SF340A](https://openairdocs.org/model/saab-scania-sf340a) (OpenAirDocs)
- Aircraft serial: 340A023
- Engine: Ge CT75A1
- System (JASC): [7210 · Turbine Engine Reduction Gear](https://openairdocs.org/jasc/7210)
- Part: Bearing
- Condition: Cracked
- Location: Gearbox
- Part time: 28,928 hours
- Component: Hamstd, 7758001
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX2450

## Discrepancy

UPON DISASSEMBLY OF GEARBOX, THE FOLLOWING WAS OBSERVED:  CRACKED AFT GEARBOX HOUSING, (PN RFN922).  CRACKED AFT RIGHTHAND IDLER ROLLER BEARING, (SN 4257, PN 775761-2).  RIGHT IDLER FORWARD TAB WASHER WAS FOUND BROKEN, (PN 789578-1).  REF:  HSS SO NR 258577SO.  CUST:  EXPRESS A/L.  CMM 72-11-02.  REF:  OPER CNTRL NR SI3R99014, AND 99ZZZX2451.

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