# SDR 2013FA0000447

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 14, 2013
- Submitted: August 9, 2013
- Operation: General aviation
- Aircraft: [N4174B](https://openairdocs.org/aircraft/N4174B), registered now
- Make and model: Diamon DA 40
- Registry model: [Diamon DA 40](https://openairdocs.org/model/diamond-aircraft-ind-da-40) (OpenAirDocs)
- Aircraft serial: 40932
- System (JASC): [3210 · Main Landing Gear](https://openairdocs.org/jasc/3210)
- Part: Bolt
- Part number: LN903710090
- Condition: Broken
- Location: Rt Mlg
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2013FA0000447

## Discrepancy

BROKEN BOLT FOUND ON RT MLG DURING SCHEDULED 100 HR INSPECTION.  THERE ARE 2 OF THESE BOLTS IAW ASSY.  THE AFT OF THE 2 WAS BROKEN WITH THE FWD BOLT STILL IN TACT.  THIS IS A FLIGHT SCHOOL ACFT, SO PROBABLE CAUSE IS EITHER HIGH AMOUNT OF LANDING CYCLES, A HARD LANDING, OR BOTH.  TO PREVENT FURTHER OCCURENCE IS TO REPLACE THESE BOLTS EVERY 1000 HRS TIS OR DURING REMOVAL/REINSTALLATION OF MLG ASSY, WHICHEVER OCCURS FIRST.

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