# SDR DXTA2026090809581

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 6, 2026
- Submitted: September 8, 2026
- Operation: Air carrier
- Aircraft: [N139QS](https://openairdocs.org/aircraft/N139QS), registered now
- Make and model: Bombdr BD7001A11
- Aircraft serial: 60200
- Aircraft time: 116 hours, 65 cycles
- System (JASC): [5100 · Standard Practices/Structures](https://openairdocs.org/jasc/5100)
- Part: Unknown
- Condition: Noise
- Location: Zone 200
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2026090809581

## Discrepancy

REACHING FL450 VERY LOUD ABNORMAL AIR RUSHING SOUND FROM MAIN CABIN DOOR AREA.   MORE PRONOUNCED FROM FWD PORTION OF DOOR.  NO ABNORMAL PRESSURIZATION OR DOOR INDICATIONS.  CABIN ALT 4500'. CABIN DIFF 10.31. SOUND WENT AWAY AS WE DESCENDED BELOW FL410.   INSPECTED THE MED DOOR SEAL & INSPECTED VENT DOOR SEAL,  NO DEFECTS NOTED. PRESSURIZED THE ACFT. OPS & LEAK CHKD GOOD ON THE MED. COULD NOT DUPLICATE SOUND AT THE MED. COULD NOT DUPLICATE FAULT, INSPECTION OF THE MED WERE GOOD, AND NO HISTORY. WORK PERFORMED IAW AMM 52-11-00, AMM 21-31-00, AND AMM 52-11-69.

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