# SDR ASAA2021070435263

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 4, 2021
- Submitted: July 7, 2021
- Operation: Air carrier
- Aircraft: [N440AS](https://openairdocs.org/aircraft/N440AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41705
- Aircraft time: 28,738 hours, 9,243 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Hose
- Part number: 1613581
- Condition: Leaking
- Location: Pnuematic Sys
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021070435263

## Discrepancy

L DUCT PRESSURE EXCEEDS 60 PSI LIMIT. AT 6000FT N1 69% L-61PSI R-40PSI. AT 7500FT N1 82% L-80PSI R-40PSI. AT 9000FT N1 95% L-80PSI R-40PSI. GROUNDED - YES. DIVERSION TIME 20 MINUTES - FOUND FLEX LINE AT PRECOOLER LEAKING P/N 16135-81. REPLACED FLEX LINE TO PRSOV, OPS AND LEAK CHECK OK REF B737-900 FIM TASK 36-11 TASK 803. GROUND VERIFICATION CHECK OK REF SAME.

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