There are two equipment racks located aft of the flight compartment across from each other between FS326.00 and FS344.62. The equipment racks contain mounting racks and mounting trays that contain avionics units and components.

The LH equipment rack has the following components:

• Remote Data Concentrator (RDC)
• Inertial Reference Unit (IRU)
• Aircraft Personality Module (APM)
• Traffic Surveillance System (TSS) Transceiver
• External Compensation Unit No. 1
• Radio Interface Unit (RIU) No. 1 and optional internal Selective Calling (SELCAL) (option) (post SB 350-23-002)
• VHF Navigation Receiver No. 1 with internal Automatic Direction Finder (ADF) No. 1
• Distance Measuring Equipment (DME) No. 1
• Global Positioning System (GPS) No. 1
• Equipment-Rack-Vent Temperature Sensor No. 1
• Flap Control Unit (FCU)
• LH Secondary Power Center (SPC)
• Left Circuit Breaker Panel
• Fuel Quantity Computer
• Horizontal-Stabilizer-Trim Electronic-Control Unit (HST ECU)
• Brake Control Unit
• Junction Box JB1
• Junction Box JB3
• VHF Communication Transceiver No. 1
• Stall Protection Computer
• Data Loader
• Lightning Detection Processor (option) (post SB 350-34-002)
• VHF Communication Transceiver No. 3 (option) (post SB 350-23-003)
• Maintenance Panel
• Data Loader Panel
• Passenger-Door Internal Switch

The RH equipment rack has the following components:

• Equipment Rack Vent Temperature Sensor No. 2
• Integrated Avionics Processor System (IAPS) Environmental Control
• Input/Output Control (IOC) (Qty 2)
• Integrated Avionics Processor System (IAPS) Power Supply (Qty 2)
• Options Control Module (OCM) and Optional Internal 3D Navigation Map (Qty 2)
• Integrated Avionics Processor System (IAPS) Card Cage
• Maintenance Diagnosis Computer (MDC)
• Configuration Strapping Unit (CSU) (Qty 2)
• Flight Guidance Computer (FGC) (Qty 2)
• VHF Communication Transceiver No. 2
• Radio Interface Unit (RIU) No. 2 and Optional Internal Selective Calling (SELCAL) (post SB 350-23-002)
• Junction Box JB2
• Right Secondary Power Center (SPC)
• Right Circuit Breaker Panel
• Spoiler Electronic Control Unit (SECU) (Qty 2)
• Data Concentration Unit (DCU)
• Proximity Sensor Electronic Unit (PSEU)
• Inertial Reference Unit (IRU)
• Aircraft Personality Module (APM)
• Terrain Avoidance Warning System (TAWS) Computer
• Synthetic Vision Computer (SVC)
• Video Interface Unit (VIU)
• VHF Navigation Receiver No. 2 without optional internal Automatic Direction Finder (ADF) No. 2 (pre SB 350-34-001)
• VHF Navigation Receiver No. 2 with internal Automatic Direction Finder (ADF) No. 2 (post SB 350-34-001)
• Air Traffic Control (ATC) Transponder No. 2
• Flight Management Computer (FMC) No. 1 and optional internal Flight Management System (FMS) V-Speed
• Junction Box JB4
• Global Positioning System (GPS) No. 2
• Distance Measuring Equipment (DME) No. 2
• Flight Management Computer (FMC) No. 2 and optional-internal dual Flight-Management System (FMS) V-Speed

There are five access panels on each of the LH and RH equipment racks. When these panels are removed, it gives access to the avionic equipment and components found in the equipment racks.

The two inboard aft access-panels on each rack are made from aluminum alloy. These panels are held in position with screws and washers.

An outboard aft access-panel on each rack is made from aluminum alloy. These panels are held in position with quick-release screws.

The two passenger-compartment walkway access-panels on each rack are made from a graphite and fiberglass composite fabric. These panels are held in position with quick-release screws.