# SDR 9JLA202012090001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 17, 2020
- Submitted: December 9, 2020
- Operation: Air carrier
- Aircraft: [N445N](https://openairdocs.org/aircraft/N445N), registered now
- Make and model: Lear 45LEAR
- Aircraft serial: 202
- Aircraft time: 5,513 hours, 4,308 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Muffler
- Part number: 12845096001
- Condition: Split
- Location: Cockpit
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9JLA202012090001

## Discrepancy

DURING SCHEDULED MAINTENANCE EVENT THE COCKPIT MUFFLER ASSEMBLY WAS FOUND SPLIT OPEN.  THE MAINTENANCE VENDOR REMOVED THE DAMAGED MUFFLER P/N 12845096-001 AND A NEW MUFFLER WAS INSTALLED.  OPERATIONS CHECKS SATISFACTORY.  NOTE: THIS IS A COMMON DAMAGE FINDING FOR THE COCKPIT MUFFLERS ON THE LEAR 45 AIRCRAFT.

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