# SDR IPXA2026031815186

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 17, 2026
- Submitted: March 18, 2026
- Operation: Air carrier
- Aircraft: [N446UP](https://openairdocs.org/aircraft/N446UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 27735
- Aircraft time: 38,929 hours, 21,243 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Unknown
- Condition: Odor
- Location: Cockpit
- Stage of operation: TO
- How discovered: O
- Nature of condition: B
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2026031815186

## Discrepancy

ON DEPARTURE, MAX PWR T/O , STRONG SMELL OF DIRTY SOCKS ON FLT DECK. PERSISTED UNTILL LEVEL OFF@ FL 360. REF FIM 21-00 TASK SUPPORT. REFERENCE: 21-00-01/301 ISOLATED SMELL TO RIGHT ENGINE BY ISOLATING BLEEDS AT HIGH POWER, NOTED TO ONLY OCCUR WHILE USING RIGHT ENGINE BLEED WITH RIGHT PACK, NO SMELL NOTED WITH LEFT ENGINE SYSTEM. C/W FIM ENGINE OIL/FUEL SMELL IDENTIFIED IN CABIN REFERENCE: 71-05 FAULT TREE 828 BLOCKS 1 THROUGH 4, AFTER REMOVING RIGHT HAND LOWER COMPRESSOR FAIRING NOTED OIL STAINING/RESIDUE ON COMPRESSOR CASE AT APPROX 5 O`CLOCK POSITION. FURTHER INSPECTION NEEDED FOR TROUBLESHOOTING.

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