# SDR CALA2026080318219

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 2, 2026
- Submitted: August 3, 2026
- Operation: Air carrier
- Aircraft: [N36272](https://openairdocs.org/aircraft/N36272), registered now
- Make and model: Boeing 737824
- Aircraft serial: 31590
- Aircraft time: 76,931 hours, 27,804 cycles
- Engine: Cfmint CFM567B262
- Engine time: 2,958 hours, 1,385 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Shutoff Valve
- Part number: 32145526
- Part serial: 3753
- Condition: Faulted
- Location: Nr 1 Eng
- Part time: 1,026 hours, 476 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026080318219

## Discrepancy

BURNING ODOR ON TO LT DUCT PRESS 85. RT DUCT PRESS 45,  PERFORMED WALK AROUND, NO EXTERNAL FINDINGS NOTED. C/W TASK 05-51-26-800-801-C1 CONDITIONAL INSPECTIONS FOR SMOKE IN CABIN. FOUND NO FURTHER INDICATIONS OF BURNING ODOR. CONTINUED TO TROUBLESHOOTING  LT DUCT PRESS INDICATION IAW AMM 36-11-00-700-801. FOUND PRSOV TO BE AT FAULT. REMOVED AND REPLACED NR 1 ENG PRSOV IAW AMM 36-11-04. OPS CHKD GOOD. RAN NR 1 ENG AT POWER,  BLEED SCHEDULE CHK. LEAK CHKD GOOD. LT DUCT PRESS WITHIN LIMITS.  ACFT IS OK TO RETURN TO SERVICE.

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