# SDR 99ZZZX208

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 31, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N712AL](https://openairdocs.org/aircraft/N712AL), registered now
- Make and model: Skrsky S76A
- Aircraft serial: 760280
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Gearbox
- Part number: 23035179
- Condition: Making Metal
- Location: Main Rotor
- 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/99ZZZX208

## Discrepancy

UPON INSPECTION OF GEARBOX PARTS DURING DISASSEMBLY, FOUND CUT O-RING UNDER SCREEN NR 6840136 IN OIL DELIVERY TUBE OIL PASSAGE.  THIS COULD HAVE CAUSED RESTRICTED OIL FLOW TO OIL DELIVERY TAKE WHICH LUBES 2-1/2 BEARING AREA.  SUBMITTER STATED LACK OF OIL  IN 2-1/2 BEARING WAS POSSIBLY CAUSE FOR 2-1/2 BEARING BREAK-UP.

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