5) Aerospace Manufacturing Preview This week is a key week for earnings from aerospace and defense companies, with a slew of names speaking at investor conferences. The rundown for earning reports includes TransDigm ( TDG) on Tuesday, Spirit AeroSystems ( SPR) on Thursday and FLIR Systems ( FLIR) on Friday. The analysts at UBS have a mixed preview of the stocks. TransDigm beat estimates earlier today, reporting earnings, excluding items, of $1.42 a share compared to the forecast of $1.25 a share. Sales rose 51% to $352 million, north of the $345.8 million forecast. As expected, the company raised its guidance for 2012 in light of its closed acquisition of Harco. Prior to Tuesday's earnings report, TheStreet rated TransDign a buy. Out of 14 analysts, 7 rate the stock at a strong buy, 1 at a moderate buy and 6 at a hold. Spirit is rated a strong buy by 13 of 20 analysts following the company. "While SPR has had a good run it still trades at a sizeable discount and we see upside on an in line guide with positive free cash flow ," writes UBS in a recent report. FLIR is rated a hold stock . -- Written by Chao Deng in New York. >To contact the writer of this article, click here: Chao Deng. >To follow the writer on Twitter, go to: @chao_deng >To submit a news tip, send an email to: email@example.com.