# SDR SWAA2026032481715

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 20, 2026
- Submitted: March 24, 2026
- Operation: Air carrier
- Aircraft: [N8535S](https://openairdocs.org/aircraft/N8535S), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 63596
- Aircraft time: 29,030 hours, 14,860 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Unknown
- Condition: Odor
- Location: Cabin
- Stage of operation: TX
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2026032481715

## Discrepancy

ACRID SMELL IN COCKPIT WITH APU RUNNING. CREW HAD MENTIONED THIS SMELL WAS NOT PRESENT UNTIL THE APU WAS RUNNING WHILE TAXIING IN. THEY SEEMED TO OF ALREADY ISOLATED IT TO THE APU FOR IS SAYING THEY COULD DUPLICATE IT WITH THE APU RUNNING AND HOW IT WOULD GO AWAY WITH THE APU OFF.   PERFORMED FAULT ISOLATION IAW FIM 21-00 TASK-806 AND AMM 05-51-56. NO FUMES; SMOKE; OR UN-USUAL ODORS NOTED WITH APU RUNNING AND APU BLEED RUNNING BOTH PACKS. A/C OK FOR SERVICE.

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