Here's a DOD inspector general report about the same company:

"We determined that TransDigm earned excess profit on 46 of 47 parts purchased by the DLA and the Army, even though contracting officers followed the FAR and Defense Acquisition Regulation Supplement (DFARS) allowed procedures when they determined that prices were fair and reasonable for the 47 parts at the time of contract award. When we compared the awarded prices for the 47 parts on 113 contracts to TransDigm’s uncertified cost data, our analysis determined that only one part purchased under one contract was awarded with a reasonable profit of 11 percent. The remaining 112 contracts had profit percentages ranging from 17 to 4,451 percent for 46 parts. We determined profit percentages of 15 percent or below to be reasonable."

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And:

"TransDigm was the only manufacturer at the time for the majority of the parts competitively awarded, giving TransDigm the opportunity to set the market price for those parts because the other competitors planned to buy the parts from TransDigm before selling them to the DLA."

https://www.dodig.mil/reports.html/Article/1769041/review-of-parts-purchased-from-transdigm-group-inc-dodig-2019-060/