# SDR CA190530002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 28, 2019
- Submitted: August 17, 2020
- Operation: General aviation
- Make and model: Airbus BD-500-1A10
- Registry model: [Airbus BD-500-1A10](https://openairdocs.org/model/airbus-canada-ltd-ptnrsp-bd-500-1a10) (OpenAirDocs)
- System (JASC): [2797 · Flight Control System Wiring](https://openairdocs.org/jasc/2797)
- Part: Interface Unit
- Part number: 4988001007
- Condition: Degraded
- Location: Flt Controls
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA190530002

## Discrepancy

(CAN) THIS SDR IS SUBMITTED PER CSALP PROCEDURES UPON THE OPENING OF CONTINUING AIRWORTHINESS PROJECT NUMBER CAW-BD5-27-0169.  THE INCEPTOR INTERFACE MODULE NO. 3 (IIM 3) COMMAND BOARD SEPARATION PROCESS WAS FOUND TO INDUCE MECHANICAL STRESS ON FOUR CERAMIC CAPACITORS ADJACENT TO THE BOARD`S EDGES. FIVE IIM 3 FAILURES, RESULTING IN LOSS OF ONE REDUNDANT CHANNEL, WERE CONFIRMED TO BE DUE TO THE COMMAND BOARD SEPARATION PROCESS. A FURTHER FORTY-THREE IIM 3, PRODUCED USING THE SAME COMMAND BOARD SEPARATION PROCESS ARE CURRENTLY INSTALLED ON AIRCRAFT, AND THEREFORE CONSIDERED SUSPECT. (TC# 20190530002)

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