# SDR ASAA2023100845528

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 8, 2023
- Submitted: October 10, 2023
- Operation: Air carrier
- Aircraft: [N953AK](https://openairdocs.org/aircraft/N953AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44103
- Aircraft time: 3,777 hours, 1,080 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Modulating Valve
- Part number: 632920703
- Part serial: 3097
- Condition: Faulty
- Location: #2 Engine
- Part time: 3,760 hours, 1,076 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023100845528

## Discrepancy

MAINT LIGHT ILLUMINATED ON OVERHEAD PANEL. GROUNDED - YES. FOUD FAMV(R) STATUS MESSAGE. FAULT 36-12021 ACTIVE. ACCOMPLISHED LRU REPLACEMENT TEST REF AMM 36-12-00. FAILED. JROBERTS 38885. REMOVED & REPLACED ENGINE 2 FAN AIR MODULATING VALVE WITH NEW REF AMM 36-12-03. PERFORMED PNEUMATIC ENGINE ON-SYSTEM TEST REF AMM 36-00-00-730-801. ALL TESTS PASSED, OPS CHECK NORMAL. OVERHEAD MAINT LIGHT EXTINGUISHED.

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