NASA Image of Micrometeoroid Impact Damage on ISS
ISS015-E-10854 (6 June 2007)
During the Russian spacewalk conducted by cosmonauts Fyodor Yurchikhin, Expedition 15 commander, and Oleg Kotov, flight engineer, on June 6, 2007, Yurchikhin commented on damage to a multi-layer insulation (MLI) protective blanket on the Zarya module.
The damage, he noted, was apparently from a micrometeoroid impact.
The date the damage occurred is unknown but has had no impact to vehicle operations.