# SDR CA100521003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 18, 2010
- Submitted: January 4, 2011
- Operation: Air carrier
- Make and model: Boeing 747SP-J6
- Registry model: [Boeing 747SP-J6](https://openairdocs.org/model/boeing-747sp-j6) (OpenAirDocs)
- Aircraft time: 57,733 hours
- Engine: Pwa JT9D7J
- System (JASC): [5340 · Fuselage Main, Attach Fittings](https://openairdocs.org/jasc/5340)
- Part: Stand Off
- Part number: BACN10GH3A10
- Condition: Broken
- Location: Bs 1301
- 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/CA100521003

## Discrepancy

CARRYING A ROUTINE LEAK TEST ON NR 1 AUX PITOT SYSTEM.  FOUND SYSTEM LEAKING.  DISCOVERED THE NR 1 AUX PITOT PRESSURE TUBE (3/8IN) AT BS 1301, WORN OPENED.  THE TUBE IS ATTACHED TO THE STRINGER WITH A CLAMP ON A STAND-OFF, THE STAND-OFF WAS FOUND BROKEN AND THE TUBE ACTUALLY RUBBED AGAINST THE BROKEN HALF OF THE STAND-OFF THAT WAS STILL ATTACHED THE THE STRINGER.  TUBE SECTION, CLAMP AND STAND-OFF WERE REPLACED.  LEAK TEST CARRIED OUT, SERVICEABLE.

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