# SDR 2005FA0000816

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 8, 2005
- Submitted: June 8, 2005
- Operation: General aviation
- Aircraft: [N3PD](https://openairdocs.org/aircraft/N3PD), registered now
- Make and model: Doug MD 900
- Registry model: [Doug MD 900](https://openairdocs.org/model/mcdonnell-douglas-helicopter-md-900) (OpenAirDocs)
- Aircraft serial: 90000085
- Aircraft time: 1,606 hours
- Engine: Pwc PW207E
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Hub
- Part number: 900R2101006107
- Part serial: 0957650178
- Condition: Cracked
- Location: Main Rotor
- Part time: 127 hours
- Component: Hub, Doug
- Component part number: 900R1101000B119
- Stage of operation: IN
- How discovered: W
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005FA0000816

## Discrepancy

DURING ACCOMPLISHMENT OF AD 2002-10-05- MAIN ROTOR UPPER HUB INSP FOUND (2) BOLT HOLES CRACKED AS DEPICTED IN MD HELICOPTERS SERVICE BULLETIN 900-072.  CRACKS WERE FOUND USING MAGNIFIED VISUAL METHOD.  HUB WAS SUBSEQUENTLY INSPECTED BY EDDY CURRENT METHOD TO VERIFY CRACKS.  EDDY CURRENT INSPECTION USING A BOLT HOLE SCAN FOUND A THIRD HOLE CRACKED.  THIS CRACK WAS NOT VISIBLE AT THE FLANGE SURFACE USING THE MAGNIFIED VISUAL METHOD.  TO DATE HUB IS ON ORDER PENDING REPLACEMENT.

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