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- Sat Oct 14, 2006 9:46 am
- Forum: Plane Spotting
- Topic: A320 Hydraulic Trouble?
- Replies: 18
- Views: 8051
As it has been alluded to in previous posts the noises you heard during pushback are perfectly normal and are the hydraulic system pumps pressurising the system and the hydraulic PTU performing a test sequence after the NO.2 engine has started and during engine NO. 1 start. As to leaving the flaps d...