Affected models include 64GB and 128GB MacBook Air units sold between June 2012 and June 2013. The announcement comes on the heels of a firmware update for MacBook Airs that was issued earlier this week.
Apple noted at the time of the update that "a small percentage of flash storage drives in these MacBook Air models have an issue that may result in data loss," and the company encouraged owners of those devices to update their firmware.
Those users that run the firmware update and are directed to Apple's support page are urged to bring their devices in to an Apple Retail Store or an Apple Authorized Service Provider, or to call Apple Technical Support. Owners of affected drives should not install any operating system updates or new applications. Instead, they should regularly back up their data until they have received a replacement drive.
Before bringing their devices in for service, Apple recommends that users back up their data.
The SSD replacement program is available worldwide, but it does not extend the standard warranty coverage of the MacBook Air. The program covers affected MacBook Air for three years after the first retail sale of the unit. Apple will continue to evaluate service data and will provide further updates to this program as needed.