Here is an image from the season one He-Man episode "Teela's Quest" that appeared in some of the promotional material for the series. Interestingly this would be the only time we ever see Prince Adam and Cringer working on something technical. Also have a look at the Panini Masters of the Universe sticker album to see this promotional image oddly used in the "Colossor Awakes" story! Man-At-Arms was later shown trying to fix the Sky Sled in the moral for "The Curse of the Spellstone" and again in "A Beastly Sideshow". Did they ever fix this particular Sky Sled?
(click on the image to see it at full-size)