# SDR USAA2012012500015

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 24, 2012
- Submitted: January 26, 2012
- Operation: Air carrier
- Aircraft: [N521UW](https://openairdocs.org/aircraft/N521UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 3944
- Aircraft time: 10,250 hours, 3,324 cycles
- System (JASC): [3222 · Nose/Tail Landing Gear Strut/Axle](https://openairdocs.org/jasc/3222)
- Part: Hinge Pin
- Part number: D64433AAR
- Condition: Cracked
- Location: Nlg
- Part time: 10,264 hours, 3,324 cycles
- Stage of operation: IN
- How discovered: D
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2012012500015

## Discrepancy

C6 PHASE CHECK - NLG TORQUE LINK CENTER HINGE PIN IS CRACKED AT BS+X799.6, WL -Z2530, BL 0.  REPLACED NLG TORQUE LINK CENTER HINGE PIN AT BS+X799.6, WL -Z2530, BL 0 IAW TASK CARD 26C71032003.  RECEIVED FURTHER INFORMATION, REPLACED "AT SHOULDER"  WITH "AT BS+X799.6, WL -Z2530, BL 0" IN PROBLEM DESCRIPTION.  CORRECTED PART NUMBER TO D64433AAR, ADDED DATA TO SEC 7 FIELDS.

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