# SDR 2005FA0000328

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 5, 2004
- Submitted: March 15, 2005
- Operation: General aviation
- Make and model: Airbus A330*
- System (JASC): [1430 · Fasteners](https://openairdocs.org/jasc/1430)
- Part: Bolt
- Condition: Cracked
- Location: Bypass Valve
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005FA0000328

## Discrepancy

A DOOR BYPASS VALVE WAS RETURNED FOR INVESTIAGTION.  THE REASON FOR RETURN WAS ON PUSHBACK, FLIGHT CREW REPORTED GREEN RESERVOIR LOW LEVEL, WHERE THE INVESTIGATION FOUND A LEAK ON THE DOOR BYPASS VALVE.  THE INVESTIGATION IDENTIFIED THAT BOLT HAD SHEARED.  FURTHER INVESTIAGTION AT MFG INDICATED THAT INITIATING FORCE HAD RESULTED IN A CRACK THAT PROPAGATED ACROSS THE BOLT SECTION, RESULTING IN FAILURE.  THE BOLTS COULD BE YIELDED WHEN TIGHTENED.  (K)

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