# SDR SWI2026F00078

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 16, 2026
- Submitted: January 19, 2026
- Operation: Air carrier
- Aircraft: [N973SW](https://openairdocs.org/aircraft/N973SW), registered now
- Make and model: Cndair CL6002B19
- Aircraft serial: 7949
- Aircraft time: 48,769 hours, 42,394 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Part number: 78279015
- Part serial: 200306018
- Condition: Fumes
- Location: Left
- Part time: 41,673 hours, 38,241 cycles
- Stage of operation: CR
- 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/SWI2026F00078

## Discrepancy

FUMES DURING FLIGHT AFTER SWAPPING BLEEDS FROM APU TO ENGINES. FUMES RESOLVED WHEN LEFT PACK WAS SHUT OFF.  (FLIGHT 5117)PERFORMED FIM TASK 21-21-0 PERFORMED OPERATION CHECK OF BOTH LEFT AND RIGHT PACKS PER  21-51-00, ISOLATED BLEED SOURCE AND PERFORMED OPERATIONAL CHECK OF BOTH L AND R PACKS, FOUND SMELL TO BE COMING FROM LEFT PACK WITH ALL BLEED SOURCES. VERIFIED RAM SOV IS OPERATIVE. AFTER ACM REPLACEMENT SEE AML 1800178 FOR REPLACEMENT, PERFORMED LEAK CHECK NO LEAKS NOTED. RAN AIRCRAFT IN REFERENCE TO AMM 72-00-00, RAN LH PACK ON BOTH ENGINE AND APU BLEED SOURCES, NO ODORS, FUMES, OR SMOKE NOTED AT THIS TIME, AIRCRAFT OKAY FOR SERVICE.

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