# SDR K11A2026051500380

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 15, 2026
- Submitted: May 19, 2026
- Operation: Air carrier
- Aircraft: [N406CK](https://openairdocs.org/aircraft/N406CK), registered now
- Make and model: Boeing 737-45D
- Registry model: [Boeing 737-45D](https://openairdocs.org/model/boeing-737-45d) (OpenAirDocs)
- Aircraft serial: 28752
- Aircraft time: 60,111 hours, 29,228 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Duct
- Part number: 65515528
- Condition: Cracked
- Location: Zone 100
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/K11A2026051500380

## Discrepancy

PROBLEM DESCRIPTION: LEFT PACK ILLUMINATED FOUR TIMES IN FLIGHT. FOLLOWED CHECK LIST UNABLE TO RESET PACK. CORRECTIVE ACTION & OTHER PERTINENT INFORMATION: TRANSFERRED TO DMI#40600058 CAT C DUE 5/25/2026 IAW B737 KC2 MEL REF 21-1-5A SPECIAL PROCEDURES (O) 21-01-05A REQUIRED PLACARDS INSTALLED. REMOVED AND REPLACED DUCT ASSEMBLY IAW B737 AMM 21-51-61, OPS CHECK GOOD NO DEFECTS NOTED. THIS CLEARS DMI #40600058, PLACARDS REMOVED

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