Drogue Failure Result of "Inconsistent Wiring Label Definitions"
A recent return mission carrying samples from the asteroid Bennu raised eyebrows at NASA when a drogue chute failed to deploy during the landing sequence. During the return of the OSIRIS-REx mission, a drogue was supposed to deploy at 100,000 feet to stabilize and slow the capsule during a 5-minute descent down to 10,000 feet. Instead, the signal triggered a different reaction at 100,000', jettisoning the parachute prior to it even deploying. With its retention cord cut, the main parachute was forced to take the entire deceleration load on its own. Luckily, NASA says, the margins as designed were sufficient to protect the Bennu sample.
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