# SDR CALA2026011913041

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 15, 2026
- Submitted: January 19, 2026
- Operation: Air carrier
- Aircraft: [N41140](https://openairdocs.org/aircraft/N41140), registered now
- Make and model: Boeing 757224
- Aircraft serial: 30353
- Aircraft time: 96,607 hours, 20,313 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Filter
- Part number: 21FA407G
- Condition: Clogged
- Location: Zone 100
- Stage of operation: TX
- 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/CALA2026011913041

## Discrepancy

FUEL OR BURNED RUBBER SMELL RETURNED AFTER PUSHBACK AND ENG ST ART SMOKE/ODOR QUESTIONAIRE ATTACHED COMPLIED WITH AMM TASK 05-51-58-910-801-C1 FROM STEP 1. A TO STEP 2. INITIAL OPERATIONAL CHECKS THRU C 2 U. COMPLETED SMOKE/ODOR IN THE FLIGHT DECK AND/OR CABIN CONDITIONAL INSPECTION REF AMM TASK 05-51-58-910-801-C1. FOUND DEBRIS ON ZONAL DRYER FILTER. REMOVED AND REPLACED FILTER. REF AMM 21-70-00. FOUND DEBRIS ON HIGH-EFFICIENCY (HEPA) FILTER. REMOVED ADD 414123, U243593 AND REPLACED HEPA FILTER. REF AMM 21-25-02. PERFORMED ENGINE RUN AND AIRCRAFT TAXIING. OPS CHECK GOOD. NO DISCREPANCY OR ODORS NOTED.

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