# SDR DALA2026082704869

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 25, 2026
- Submitted: August 27, 2026
- Operation: Air carrier
- Aircraft: [N304DU](https://openairdocs.org/aircraft/N304DU), 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: 55080
- Aircraft time: 15,923 hours, 7,171 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Filter
- Condition: Contaminated
- Location: Zone 100
- Stage of operation: DE
- 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/DALA2026082704869

## Discrepancy

DIRTY SOCK ODOR AT AND AFTER TOP OF DEAD, CLEARED AFTER A COUPLE MINS. PERFORMED ISOLATE SMOKE AND FUMES IN COCKPIT AND CABIN WC 0550- 2001. PERFORMED GVI OF ENG 1 AND ENG 2 WITH NTF IAW A220 AMP 72-00. PERFORMED GVI OF APU IAW AMP 49-10 WITH NTF EXTERNALLY (ES 791444) R/R RECIRCULATION FILTERS IAW AMP 21-22.  C/W WORKCARD 0551-2001. FOUND APU TO BE SOURCE OF FUMES. C/W WORKCARD 0551-2002. PERFORMED ECS DECONTAMINATION WORKCARD 0551-2003 W/ GND A/C START CART. ODORS NO LONGER PRESENT. (LP# 9080968, 9080970; AIRCRAFT WAS GROUNDED)

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