Specifically, “denied a request” to climb because there was an airplane above ?
http://www.washingtonpost.com/world/asia_pacific/air-search-for-missing-airasia-jet-suspended/2014/12/28/a903067e-8e8c-11e4-a900-9960214d4cd7_story.html
Wow, a lot of good that did, eh ?
yep, all am awaiting now is to hear the plane made a U-Turn.