# SDR UIEA2017110302168

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 3, 2017
- Submitted: November 6, 2017
- Operation: Air carrier
- Aircraft: [N1997A](https://openairdocs.org/aircraft/N1997A), registered now
- Make and model: Boeing 767-33A
- Registry model: [Boeing 767-33A](https://openairdocs.org/model/boeing-767-33a) (OpenAirDocs)
- Aircraft serial: 27310
- Aircraft time: 92,741 hours, 18,329 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Coupling
- Condition: Unsecure
- Location: Precooler
- 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/UIEA2017110302168

## Discrepancy

DURING AN OPS CHECK OF THE FAN AIR VALVE FOUND BLEED LEAK ON THE NR 1 ENGINE.  TROUBLESHOOTING AND FOUND THE PNEUMATIC DUCT BETWEEN THE PRECOOLER AND PRSOV LOOSE AT THE FLANGE COUPLING ABOVE THE PRECOOLER. SECURED THE FLANGE COUPLING IAW IAW AMM 36-11-01.  OPS AND LEAK CHECKED GOOD.

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