# SDR 2010FA0000008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 1, 2009
- Submitted: January 8, 2010
- Operation: General aviation
- Aircraft: [N5325U](https://openairdocs.org/aircraft/N5325U), registered now
- Make and model: Piper PA-28R-201
- Registry model: [Piper PA-28R-201](https://openairdocs.org/model/piper-pa-28r-201) (OpenAirDocs)
- Aircraft serial: 2844044
- System (JASC): [5541 · Rudder, Spar/Rib](https://openairdocs.org/jasc/5541)
- Part: Tube
- Part number: 63547000
- Condition: Cracked
- Location: Rudder Horn
- Part time: 4,742 hours
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2010FA0000008

## Discrepancy

INNER PORTION OF RUDDER HORN TUBE (PN 63547-000) CRACKED AT WELD ASSY (PN 63546-000) ON UNDERSIDE OF WELD BEAD.  AREA IN QUESTION EXHIBITED SIGNS OF EXCESSIVE WELD PENETRATION ALONG WITH PROJECTING GLOBULES.  PROBABLE CAUSE OF CRACK OCCURRED DUE TO WEAKENING OF METAL FROM IMPROPER WELDING TECHNIQUES.  TO PREVENT REOCCURRENCE, THE MFG SHOULD RE-EXAMINE THE HEAT RANGE REQUIREMENT IN ORDER TO GAIN PROPER DEPTH OF WELD PENETRATION REQUIRED TO INSURE FISSION OF BASE METAL AND FILLER ROD.

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