# SDR GTIA2018121083004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 8, 2018
- Submitted: December 10, 2018
- Operation: Air carrier
- Aircraft: [N903NK](https://openairdocs.org/aircraft/N903NK), registered now
- Make and model: Airbus A320-271N
- Registry model: [Airbus A320-271N](https://openairdocs.org/model/airbus-a320-271n) (OpenAirDocs)
- Aircraft serial: 7011
- Aircraft time: 6,937 hours, 3,094 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Unknown
- Condition: Odor
- Location: Cabin
- Stage of operation: AP
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/GTIA2018121083004

## Discrepancy

SMELL SIMILAR TO HORSE MANURE DURING PREFLIGHT WHEN USING EXTERNAL AIR CONDITIONING APU BLEED SUPPLYING BOTH PACKS AND APU BLEED SUPPLYING PACK 1 ONLY. NO SMELL WHEN USING APU BLEED TO SUPPLY PACK 2 ONLY. SEE ENCLOSED COS REPORTING SHEET-COS REPORTING SHEET IDENTIFIED SOURCE TO APU. PERFORMED FUME TO CABIN SMELL INSPECTION IAW TSM 49-00-00-810-921-A. NO DISCREPANCIES FOUND AT THIS TIME SEE NEXT ITEM FOR PACK DEFERRAL

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