# SDR SWIA2026031175509

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 11, 2026
- Submitted: March 12, 2026
- Operation: Air carrier
- Aircraft: [N983SW](https://openairdocs.org/aircraft/N983SW), registered now
- Make and model: Cndair CL6002B19
- Aircraft serial: 7961
- Aircraft time: 48,433 hours, 42,159 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: A/C Pack
- Condition: Odor
- Location: Zone 100
- Stage of operation: IN
- How discovered: V
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWIA2026031175509

## Discrepancy

INTERMITTENT ENGINE OIL ODOR IN CABIN/COCKPIT DURING CRUISE/DESCENT FROM VENTS. WENT AWAY AFTER BLEED SOURCE SWAPPED TO APU DURING DESCENT  (FLIGHT 6068).  TROUBLESHOT PER FIM 79-20-01 FOR ODORS IN INTERIOR OF THE ACFT. PERFORMED OPS CHECK OF BOTH PACKS IAW AMM 21-51-10 WITH ALL 3 BLEED SOURCES AT ALL POWER SETTINGS. AT NO POINT UNDER ANY CONFIGURATION WAS THERE A FUEL OR AN OIL ODOR NOTED IN FLT DECK OR CABIN. WHEN THE RIGHT PACK WAS SELECTED ON & TO HIGHEST TEMP SETTING A FAINT MUSTY ODOR NOTED COMING FROM VENTS.  DUPLICATED WITH ALL 3 BLEED SOURCES AT ANY POWER SETTING. REMOVED AND REPLACED RT PACK COALESCER BAG IAW AMM 21-51-13, AFTER REPLACEMENT OF BAG PERFORMED SAME OPS CHECK & UNABLE TO DUPLICATE ODOR.

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