Ahsa Essay

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Airbus Helicopters Southeast Asia (AHSA) design organisation (DO) also holds the Design Organisation Approval (DOA) as part of CAAS Singapore Airworthiness Requirements (SAR) 21. This allows for the company to certify Singapore registered rotorcrafts that have undergone minor modifications to be airworthy. The proposed scope of approvals includes Type Certificates (TC), Supplemental Type Certificates (STC) and modification/repair or Singapore Technical Standard Order (STSO) certificate of approval. For AHSA DO, they are authorized to do modification and repair of helicopters related to structures, cabin interior and furnishings, and integration of avionics and electrical systems. For major modifications done to a rotorcraft, a Supplemental Type Certificate …show more content…

Replicating the H125 Tailboom Jig involved obtaining relevant dimensions through the scaling of drawings in AutoCAD followed by the modelling of the part in CATIA using the multi section surface function in Generative Sheet Design. Making the existing tailboom jig replica required the measurement of dimensions of the existing jig using a vernier caliper and measuring tape. Afterwards, the modelling of the individual components and subsequent assembly of components was done in CATIA. An appropriate machine screw actuator used in supporting the H125 tailboom was first selected based on a Factor of Safety of 3 times of its intended working load (load experienced during normal operation) of 224.1 kg per actuator (based on calculation (Figure 11) using a design load of 11772 N (Weight of tailboom (400 kg) x Factor of Safety (3) x 9.81)). Using Figure 11, the limit load (highest load) chosen to be used for the selection of the machine screw actuator was 6595 N (672.3 kg). The intended working load for the tailboom jig was 224.1

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