News reported that up to 100 instructor pilots were refusing to fly the aircraft citing problems with its oxygen system. “We take the concerns of our aircrew seriously and have directed a ... safety pause for the T-45 community to allow time for Naval Aviation leadership to engage with the pilots, hear their concerns and discuss the risk mitigations as well as the efforts that are ongoing to correct this issue,” Navy spokeswoman Cmdr. Jeannie Groeneveld said in an email to Fox News Wednesday.