module had caused the system to send alerts to pilots, who engaged... - comma

Leafka

Senior Member
Polish
Hi,

this is a part of my own text:

According to the news media, a December 2015 report by Indonesia’s National Transportation Safety Committee found that a faulty a rudder control system and crew action contributed to the crash of an AirAsia Berhad (AirAsia) plane in Indonesia in 2014. The aircraft crashed into the Java Sea off Borneo, causing the deaths of 162 people. According to the report, a crack in an electronic module caused the system to send repeated warning alerts to the pilots, who engaged in mutually exclusive and uncoordinated actions.

(The pilots got warning alerts and then engaged in the uncoordinated actions.) Was I right to use the comma (in bold)?
 
Last edited:
  • The Newt

    Senior Member
    English - US
    Yes, the comma is needed. It refers to the pilots who were in control of that particular plane, not to some sub-class made up only of the ones who engaged in mutually exclusive and uncoordinated actions..
     
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