When an aircraft experiences severe structural trauma, standard data acquisition software cannot communicate with the hardware. Specialized labs utilize hardware-level extraction techniques:
[Damaged Avionics Component] ➔ [Micro-Disassembly in Cleanroom] ➔ [Chip-Off Flash Desoldering] ➔ [Raw NAND Reader / EEPROM Dump] ➔ [Bitstream Image File] ➔ [Proprietary Protocol Parsing]
- Chip-Off Data Recovery: Forensic technicians physically desolder NAND flash storage or memory ICs directly off fractured logic boards. The raw memory chip is placed into a dedicated programmer chip reader to dump a raw bitstream image file.
- JTAG & ISP Extraction: If the board layout is semi-intact but the main operating system is unresponsive, examiners use Joint Test Action Group (JTAG) interfaces or In-System Programming (ISP) to tap directly into test points on the circuit board, bypassing software security restrictions.
- Physical Decontamination: Removing jet fuel residue, corrosion from saltwater exposure, and severe ash accumulation using ultrasonic cleaning tanks and specific chemical solvents before applying electrical current to hardware components.
