1/ Several people have asked about aircraft storage. My engineer colleagues are the experts! However, first the operator may choose to complete work based on time expiry before starting storage to reduce workload when the a/c is returned to service

2/ The a/c may then be moved to the storage location before protecting specific parts of the aircraft against wildlife. These include the engines (birds often will nest here otherwise) - hence taped polythene sheeting or if available specific engine covers (often red)

3/ Also the pitot static system which provides airspeed and altitude information to the cockpit. These have small tubes which can easily be blocked by insects and are very time consuming to repair

4/ Fluids will be drained such as potable water and obviously toilets. Fuel may be loaded to help prevent both condensation in the fuel tanks and provide ballast in case of high winds depending on location. Engine oil and hydraulic levels will be checked

5/ Systems that may be exercised to prevent problems due to storage include air conditioning packs, hydraulics and bleed air. Hydraulics especially are problematic during storage due to multiple seals, actuators and unions which can develop leaks

6/ Humidity is the enemy of a stored a/c as it will cause corrosion in metal parts and can play havoc with the interior furnishings. This is why for much longer term storage low humidity places are preferable such as the Mohave Desert

7/ A/c spending months in storage will need engineering attention on a rolling cycle (often 28 days) to check system functions and keep them airworthy. You can’t just park and forget about them! Hope this answers some of the questions