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DP Event Bulletins - 2019

Reference	Items	Published
IMCA DPE 01/19	Loss of tunnel thruster - DP undesired event Specialised pipe laying DP mode - DP undesired event Planned investigation resulted in DP incident Loss of one redundant group - DP undesired event	Feb 2019
IMCA DPE 02/19	Unfamiliarity with DP system leads to – DP undesired event Maintenance during DP operations leads to – DP undesired event Leaking cooling water pump leads to – DP undesired event Software update caused loss of generators in separate redundant groups	Jun 2019
IMCA DPE 03/19	Operating outside DP equipment class 2 requirements – DP incident Failure of DP UPS – DP undesired event Accidental breaker trip – DP undesired event Mix of absolute and relative position reference systems – DP incident DP3 drillship switchboard blacked out – DP undesired event	Sep 2019
IMCA DPE 04/19	Unreliable position reference systems leads to DP incident Vessel rotation leads to loss of position - DP incident Pipe leak leads to loss of all thrusters - DP incident Steering motor failure leads to loss of both aft thrusters - DP incident	Nov 2019

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