Hydraulic Thrust Reverser Test Benches

The Nordam Group | Tulsa, OK

The Hydraulic Test Bench tests specific models of thrust reverser actuators manufactured by Boeing, Parker- Abex NWL Division, and Lucas Aerospace. The respective manufacturer's component maintenance manual was used to develop each actuator test sequence executed by the test bench to ensure compliance with the performance requirements established by the manufacturer.

The test bench is very compact in design. The only external utility that the test bench requires is an electrical service to the primary disconnect switch. The test bench is made from an aluminum framework that provides a durable, low maintenance construction. The working area of the test bench has a two-section cover that is opened for installation of a test article and closed during test operation to protect the operator. A hydraulic power unit provides fluid pressure and flow control for test operations and is located under the working area of the test bench. The power unit is enclosed by sound absorbing panels to reduce operating noise in the surrounding area. An operator console is located beside the test bench and allows the operator to control the functions of the test bench. The test bench includes a chiller unit that is used to cool water circulated through a heat exchanger. The heat exchanger is used to control the temperature of the hydraulic oil supplied to the actuator.


An operator console controls all test stand operations. The console provides an automated interface between the operator and the test bench. The operator interface uses software based on the National Instruments LabView software package. The automated control system eases the workload on the test operator and provides greater repeatability in test results. The operator selects the actuator to be tested using the console. The actuator's respective test sequences are displayed on a selection menu. The operator may run all of the tests in sequence or select any individual test. After selecting a test, the individual test screen is displayed as the test sequence is executed. Upon completion of all required test sequences, a test report is generated in a Microsoft Excel© format and saved on the computer system.