# Disposal and Recycle Economic Assessment for Aircraft and Engine End of Life Solution Evaluation
## 3 Scenarios and Process Detail
### Aircraft Disposal and Recycle Process  
The D&R process is generalized in Figure 2. It consists of three key elements: the EoL aircraft module (in orange), the D&R process step module (dashed blue frame), and the EoL products module (dashed green frame). The EoL aircraft module refers to the grounded aircraft for which the retirement decision has been made. Within the D&R process step module, the main D&R process steps are illustrated using square blocks. Each process step contains a group of sub-process steps (listed in the bracket within the process square block). The EoL products module indicates the end-products generated from the corresponding process flows. A complete D&R process starts with the EoL aircraft and ends up with the EoL products. The sequence of the process block is indicated by the workflow arrows. The execution of a specific process step is decided at each diamond-shaped decision point. Component management and material management branches can be carried out concurrently for different components or parts of an aircraft. Further process steps are performed sequentially \begin{table}
\begin{tabular}{c c c c} \hline \hline \multirow{2}{*}{**No**} & **Stakeholder and Its** & **Disposal and Recycle (D\&R)** & **Cost and Value Distribution** \\  & **Involvement** & **Scenarios** & & \\ \hline \multirow{4}{*}{I} & The airline owns the & & & \\ aircraft. & The airline performs the aircraft & The airline performs the aircraft & The airline pays the cost of the aircraft \\ The End of Life Solution & D\&R and reuses or resells the & D\&R and retains the aircraft salvage \\ (EoLS) company has no & aircraft after the D\&R process. & value (if reuse) or the aircraft salvage \\  & involvement. & & & value and the resale profit (if resale). \\ \hline \multirow{4}{*}{II} & The airline owns the & & & \\ aircraft. & The airline reuses or resells the & D\&R (which is charged by the EoLS \\ \cline{1-1}  & The EoLS company is & aircraft after the D\&R process. & \\ \cline{1-1}  & D\&R operations. & The EoLS company performs the & \\ \cline{1-1}  & The aircraft D\&R process. & (if resale). & \\ \cline{1-1}  & D\&R operations. & The EoLS company pays the cost of the & \\ \cline{1-1}  & The airline resells the & an EoLS company without & (which is a small margin based on the \\ \cline{1-1}  & aircraft to an EoLS & performing the D\&R process. & \\ \cline{1-1}  & company. & The EoLS company purchases & The EoLS company pays the airline resale \\ \cline{1-1}  & The EoLS company owns & the aircraft, performs the D\&R & charge and the aircraft D\&R cost, while \\ \cline{1-1}  & the aircraft. & process, and reuses or resells the & possessing the aircraft salvage value (if \\ \cline{1-1}  & the aircraft afterwards. & & reuse) or the aircraft salvage value and \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Stakeholders and relevant scenarios. depending on the priority of the various disposal and recycle techniques. The D&R process for a specific project is established based on the status of the aircraft and the customer requirements relating specifically to reuse and recycle [7]. The EoL aircraft is firstly stored at dry plain boneyard such as the Southern California Logistics Airport in the United States and the Teruel Airport in Europe, which can facilitate long term parking, maintenance and recycling capabilities with large storage capacity for commercial aircraft. For this step, the aircraft is often transported or parked with or without performing maintenance activities. Whether it is necessary to perform maintenances is mainly decided by the aircraft current condition and its future usage. After deciding not to park the decommissioned aircraft, it can either be cleaned, reconditioned, converted, and recertified for resale and, subsequently, it is reused completely as passenger or freighter aircraft, or cannibalized via a series of process steps, the so-called disassembly & dismantling process.