If you put an enchanted item (for example diamond sword with fire aspect) in the donkey's chest. it will turn into a regular diamond sword after killing the donkey (done this with the same sword).
MC-15815
Enchanted Items stored in a Donkey / Mule lose enchantments on its death
Resolved
Fixed
3
AgentM
Nathan Adams
Confirmed
chest, death, donkey, enchant, enchanted, kill, lose, mule
Snapshot 13w19a, Snapshot 13w21a
Snapshot 13w21b
Retrieved
1: 2013-05-17_15.33.31.png having a diamond sword with enchantments.
2: 2013-05-17_15.33.41.png put the sword in the donkey's chest.
3: 2013-05-17_15.34.07.png killed the donkey retrieving a regular not enchanted diamond sword and the saddle+chest
4: 2013-05-17_15.34.10.png confirming the sword is really not enchanted