SDR SWAA2025102728097

Service difficulty report · Air Filter · Boeing 7378

Difficulty date: October 24, 2025
Submitted: October 27, 2025
Operation: Air carrier
Aircraft: N1803U
Make and model: Boeing 7378
Aircraft serial: 60226
Aircraft time: 9,320 hours, 4,812 cycles
System (JASC): 2120 · Air Distribution System
Part: Air Filter
Condition: Odor
Location: Zone 100
Stage of operation: AP
How discovered: O
Nature of condition: B
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

ON ROTATION BURNING SMELL IN COCKPIT AND CABIN; SMELL DISSIPATED IN COCKPIT BUT REMAINED IN CABIN ALL ENGINE INDICATIONS NORMAL. SMELL RETURNED IN CABIN ON APPROACH. PER AMM 05-51-56-201-MAX (SMOKE OR FUMES IN CABIN - MAINTENANCE PRACTICES (CONDITIONAL INSPECTION) PERFORMED FIM TASK 21-00-00-810-830. NO FUMES NOTED IN THE CABIN. ENGINE PARAMETERS NORMAL. REMOVED AND REPLACED RT RECRCULATION AIR FILTER IAW AMM 21-25-01.

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