# SDR ASAA2025121863269

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 18, 2025
- Submitted: December 23, 2025
- Operation: Air carrier
- Aircraft: [N897AK](https://openairdocs.org/aircraft/N897AK), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 67508
- Aircraft time: 597 hours, 222 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Filter
- Part number: P199753
- Condition: Odor
- Location: Zone 100
- 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/ASAA2025121863269

## Discrepancy

DURING INITIAL CRUISE FLIGHT F/A INDICATED FUME LIKE ISSUE IN AFT CABIN. PORTABLE OXYGEN USED FOR REMAINDER OF FLIGHT. DECLARED EMERGENCY RETURNED TO SAN. GROUNDED - YES. AIR TURNBACK - CONSULTED WITH PILOTS. NO ODORS WERE PRESENT DURING TAXI OUT BUT F/A REPORTED FEELING ILL. AN HR INTO FLT MULTIPLE FLIGHT ATTENDANTS HAD SAME SYMPTOMS. PERFORMED IFIM TASK 21-00-00-810-830. SMOKE OR FUMES IN CABIN, SOURCE UNKNOWN. CONFIRMED APU DRAIN MAST IS CLEAN. CONFIRMED HYD RESERVIORS ARE SERVICED CORRECTLY.  PERFORMED ENG IDLE RUN & RAN PACKS FOR 10 MINS & NO ODORS OR SYMPTOMS PRESENT. PER IFIM DEFECT IS INTERMITTENT. NO HISTORY FOUND. REF LOGPAGE 61135643, R & R LT & RT RECIRCULATION AIR FILTERS PER SAMC RECOMMENDATION.

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