FES Maintenance manual, v1.16 May 2020
Page 2 of 24
Table of Contents
1. Important notices..................................................................................................... 3
1.1 Limited Warranty ................................................................................................. 3
2. Introduction............................................................................................................. 4
3. Description of the FES system ................................................................................... 4
3.1 General layout ..................................................................................................... 4
3.2 Description of main FES components .................................................................... 6
3.2.1 Electric motor ................................................................................................ 6
3.2.2 Propeller........................................................................................................ 7
3.2.3 FCU instrument.............................................................................................. 8
3.2.4 Battery packs................................................................................................. 9
3.2.6 Other components ....................................................................................... 10
3.3 General FES wiring scheme ................................................................................ 12
4. FES maintenance.................................................................................................... 13
4.1 Maintenance of main FES components ................................................................ 13
4.1.1 Motor maintenance ...................................................................................... 13
4.2 Normal procedures and inspections..................................................................... 14
4.2.1 Rigging and de-rigging of an FES equipped sailplane...................................... 14
4.2.2 Daily inspection............................................................................................ 14
4.2.3 Pre-flight inspection................................................................................... 14
4.2.4 FES test run on the ground ........................................................................ 14
4.2.3 After flight inspection ................................................................................... 15
4.2.4 Ground handling .......................................................................................... 15
4.2.5 Tie-down and ground-towing ........................................................................ 15
4.2.6 Storing and transportation ............................................................................ 16
4.2.7 Cleaning ...................................................................................................... 16
4.2.8 Inspection at the end of flight season............................................................ 16
4.3 Adjustments ...................................................................................................... 17
4.4 De-rigging and rigging of FES components .......................................................... 17
4.4.1 Removing battery packs from the sailplane:................................................... 17
4.4.2 Removing and installing the motor ................................................................ 18
4.4.3 Mounting and removal of the propeller .......................................................... 19
4.5 Lubrication instructions ...................................................................................... 19
5. Periodical inspections.............................................................................................. 20
5.1 Introduction ...................................................................................................... 20
5.2 Sailplane inspection periods................................................................................ 20
5.3 Inspection after every 100 flight hours................................................................ 20
5.4 Annual inspection .............................................................................................. 21
5.5 Inspection after a rough landing or ground loop .................................................. 21
5.6 Inspection at the end of flight season ................................................................. 21
6. Parts with limited service life ................................................................................... 21
7. Placards................................................................................................................. 21
8. Balancing of rotating parts ...................................................................................... 21
9. Repairs .................................................................................................................. 22
9.1 List of potential problems ................................................................................... 22
9.2 List of spare parts.............................................................................................. 23
9.3 Soldering........................................................................................................... 23
9.4 Materials necessary for small repairs................................................................... 23
10. Revision History.................................................................................................... 24
