# SDR DALA2024011900877

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 17, 2024
- Submitted: January 19, 2024
- Operation: Air carrier
- Aircraft: [N687DL](https://openairdocs.org/aircraft/N687DL), registered now
- Make and model: Boeing 757232
- Aircraft serial: 27586
- Aircraft time: 77,481 hours, 33,411 cycles
- System (JASC): [7500 · Engine Bleed Air System](https://openairdocs.org/jasc/7500)
- Part: Duct
- Condition: Fod
- Location: 14th Stage
- Stage of operation: IN
- How discovered: 9
- Nature of condition: C, B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2024011900877

## Discrepancy

SHIP 687 ACFT EMITS RANCID SMELL OF BURNING DIRT/PLASTIC THROUGHOUT ACFT. WORST BY DOORS. MIGHT GET WORST W/ LEFT PACK SW MOVEMENT. NEVER REALLY WENT AWAY. CORRECTIVE ACTION: RAN PACKS INDIVIDUALLY FOR EXTENDED PERIOD OF TIME. RAN BOTH ENG INDIVIDUALLY WIHT AND WITHOUT PACKS, INSPECTED ALL GALLEY COFFEE MAKER+ OVENS, INSPECTED FIRST CLASS PED SYSTEM AND INSPECTED C/B PANELS IN COCKPIT WITH NO DEFECTS AND NO SMELL IN REF W/ B757 FIM 21-00-01/301. REMOVED 14TH STAGE DUCTING AND PRE-COOLER DUCITNG ON NUMBER 1 ENGINE AND FOUND RESIDUE/BURNT REMAINS OF PLASTIC SUBSTANCE. REMOVED NBR 1 ENG PRE-COOLER ASSY AND VALVE IN REF W/ B757 AMM 36-11-15. S.D 873744. INSTALLED PRE-COOLER PER B757 AMM 36-11. NO LEAKS NOTED AT THIS TIME. RAN ENG AND TUNRED ON PACKS, FOUND NO PRESENCE OF BURNT SMELL.

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