# SDR DXTA2026020906810

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 6, 2026
- Submitted: February 9, 2026
- Operation: Air carrier
- Aircraft: [N789QS](https://openairdocs.org/aircraft/N789QS), registered now
- Make and model: Bombdr BD1001A10
- Aircraft serial: 20617
- Aircraft time: 10,458 hours, 6,117 cycles
- System (JASC): [3197 · Instrument System Wiring](https://openairdocs.org/jasc/3197)
- Part: I/O Module
- Part number: 8221131001
- Part serial: 4731VH
- Condition: Defective
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2026020906810

## Discrepancy

SHORTLY AFTER TAKE OFF WE STARTED EXPERIENCING A SERIES OF CAS MSGS. AT FIRST A FEW. THEN MANY. AT THE HEIGHT 2 PAGES FULL OF CAS MSGS. AT THE LAST 1/3 OF THE FLIGHT MOST HAD RESOLVED THEM SELVES AND WERE REDUCED TO A FEW. THESE ARE SOME OF THE CAS MSGS WE EXPERIENCED:  - RED LAV SMOKE - AMBER SPOILER FAULT  - AMBER FLAPS FAIL - CYAN STAB TRIM FAULT - CYAN ENG MACH HOLD FAIL - CYAN CAS MISCOMPARE  - CYAN IAPS FAN FAULT. AT SOME POINT WE LOST THE PF PFD MFD AND COM1 ALONG WITH A NUMBER OF OTHER LEFT SIDE SYSTEM CAS MSGS. CORRECTIVE ACTION: REMOVED FAILED IAPS ENVIRONMENTAL CONTROLLER (IEC) PN 822-1131-001 SN 4731VH AND INSTALLED A REPAIRED IAPS ENVIRONMENTAL CONTROLLER (IEC) PN 822-1131-001 SN 426PKG. PERFORMED OPS CHECK OF IAPS ENVIRONMENTAL CONTROLLER (IEC) WITH NO DISCREPANCIES NOTED. OPS CHECK SATISFACTORY. NJA HAS ELECTED TO SIGN THIS DISCREPANCY OFF. WORK PERFORMED REF CL-350 AMM CH 31-45-13.

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