# SDR DALA2025030301598

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2025
- Submitted: March 3, 2025
- Operation: Air carrier
- Aircraft: [N330DU](https://openairdocs.org/aircraft/N330DU), registered now
- Make and model: Airbus BD-500-1A11
- Registry model: [Airbus BD-500-1A11](https://openairdocs.org/model/airbus-canada-lp-bd-500-1a11) (OpenAirDocs)
- Aircraft serial: 55331
- Aircraft time: 177 hours, 63 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Apu
- Condition: Contaminated
- Location: Zone 100
- Stage of operation: IN
- How discovered: V
- Nature of condition: C
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2025030301598

## Discrepancy

CREW REPORTS ODOR IN CABIN AFTER BLEED SWITCH FROM ENG DURING TAXI IN. NSP # 1 & 2 ENGINE AND APU /COMPARTMENT NO OIL CONTAMINATION NOTED. PERFORMED WORK CARD 0550-2001 , WITH # 1 & 2 ENGINES RUNNING AND PACKS ON STARTED APU AND BLEED BRIEF ODOR FOR 30 SECONDS IN COCKPIT AND FWD CABIN . ALL OTHER CONFIG NO ODORS. PERFORMED WORK CARD 0550-2003 ESC DECONTAMINATION POST SMOKE/ FUME WITH APU OFF . SMOKE AND FUME TEST KIT (TER93579) READINGS IN COCKPIT W/APU ON WAS 4870 PARTICLES AND AFTER BURN OUT AND APU OFF DROPPED DOWN TO 210 PARTICLES WITH NO ODOR IN A/C. INSP RECIRC FANS AND REPLACED RECIRC FILTERS PER A220 AMM 21-22. APU DEFERRED TO MEL ON LOG 5445870. (LP# 5445868)

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