# SDR CALA2018123102689

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 31, 2018
- Submitted: December 31, 2018
- Operation: Air carrier
- Aircraft: [N56859](https://openairdocs.org/aircraft/N56859), registered now
- Make and model: Boeing 757324
- Aircraft serial: 32818
- Aircraft time: 46,794 hours, 14,896 cycles
- System (JASC): [4950 · APU Bleed Air System](https://openairdocs.org/jasc/4950)
- Part: Duct
- Condition: Cracked
- Location: Apu Bleed
- Stage of operation: CR
- How discovered: 9
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2018123102689

## Discrepancy

F/A REPORTED BURNING SMELL BACK OF A/C AFTER BITING DUCT OVERHEAT SYSTEM, FAULT CODE 54, AFT BULKHEAD SECTION 48, FOUND DUCK CRACKED 5 INCHES AT ABOVE AFT BODY ACCESS PANEL.DUCT IS MARKED.INOPING APU. NEED DUCT. APPLIED MEL TOMC UPDATE: SEE LP 8582814 FOR CORRECTIVE ACTION. APU BLEED ON MEL FOR DAMAGED DUCT. IPC 36-11-10-01 ITEM 72. MFG 212N3046-7.

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