# SDR SCNA20250127027

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 17, 2025
- Submitted: January 27, 2025
- Operation: Air carrier
- Aircraft: [N7907A](https://openairdocs.org/aircraft/N7907A), registered now
- Make and model: Boeing 737-83N
- Registry model: [Boeing 737-83N](https://openairdocs.org/model/boeing-737-83n) (OpenAirDocs)
- Aircraft serial: 32577
- Aircraft time: 58,247 hours, 41,739 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Regulator
- Condition: Faulted
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SCNA20250127027

## Discrepancy

RIGHT PACK BLEED TRIP OFF ILLUMINATED DESCENDING FROM FLT390 TO FL380.   PERFORMED BLEED AIR SYS LEAK CHECK REF AMM 36-11-00 BLEED AIR REG FAILED. R/R BLEED AIR REGULATOR ASSY IAW AMM 36-11-3 LEAK AND OPS CHECK REQUIRED.  DEFECT 785437: R/R RH PRE-COOLER VALVE IAW AMM 36-12-2 OPS CHECK GOOD. THIS CLEARS MEL 363-2 MDDR#129206

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