SOFIA (Stratospheric Observatory for Infrared Astronomy), a modified Boeing 747SP, landed at Hamburg Airport on 30 September for routine check at Lufthansa Technik. The flying observatory of the US space agency NASA and the German Aerospace Center (DLR) began the equivalent to a C-check, which takes place approximately every three years.
"We are looking forward to the renewed cooperation with Lufthansa Technik," says Heinz Hammes, SOFIA Project Manager at DLR's Space Administration branch. "The special circumstances this year require cooperation and increased flexibility from all parties involved. We are convinced that we are in the right place for the tasks ahead."
In the special case of SOFIA, the aircraft will be repaired in accordance with NASA regulations, which also defined the exact work packages for this layover. During the extended maintenance visit the aircraft structure undergoes extensive inspections before necessary repairs are carried out. Therefore, engines and cabin, including the panelling and floors, are removed in order to be able to subsequently carry out the test and maintenance work and to check all cabling and ducts.
In addition, the air conditioning system is given an upgrade. The final checks at Lufthansa Technik - for instance on the engines and the cabin's internal pressurization - are scheduled for mid-December. The maintenance work should be completed by the beginning of February when SOFIA should resume its scientific operations.