# SDR UG8A2020030911201

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 9, 2020
- Submitted: March 9, 2020
- Operation: Air carrier
- Aircraft: [N252SA](https://openairdocs.org/aircraft/N252SA), registered now
- Make and model: Urocop EC 135 P2
- Registry model: [Urocop EC 135 P2](https://openairdocs.org/model/eurocopter-deutschland-ec-135-p2) (OpenAirDocs)
- Aircraft serial: 0707
- Aircraft time: 4,423 hours, 15,028 cycles
- System (JASC): [6210 · Main Rotor Blades](https://openairdocs.org/jasc/6210)
- Part: Attach Bolt
- Part number: L621M1001205
- Part serial: 5718
- Condition: Cracked
- Location: Zone 200
- Part time: 4,423 hours, 15,028 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: Z
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UG8A2020030911201

## Discrepancy

DURING THE MAIN ROTOR INSPECTION (REMOVED) TASK 621133 STEP 37 VISUALLY FOUND A CRACK IN THE GREEN BLADE 2B BOLT RADIUS.  BOLT WAS LIQUID FLUORESCANT PENETRANT INSPECTED BY AIRCRAFT NDT SERVICES (CRS N3DR341N) WHICH CONFIRMED A CRACK WAS PRESENT.  CRACK WAS VERIFIED TO HAVE SIGNIFICANT DEPTH WITH BOTH EDDY CURRENT AND 150X STEREO MICROSOPIC VISUAL INSPECTION. REPLACED CRACKED BOLT.

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