Failure Tree Analysis

BW Wreck_Jitka Hanakova

Response to catastrophic loss of gas from an unknown source, boom scenario, while using ISC CCR.
Boom scenario

Response to discovering an unconscious CCR Diver.

CCR diver rescue

Response to Solenoid failure in the closed position.

Closed Solenoid

Response to receiving operating code error.

Code Error

Response to double sensor failure.

Double sensor failure

Response to free flowing ADV, also known as Internal Boom.

Free flowing ADV

Response to HUD Failure

HUD failure

Response to loss of breathing hose out of the mouth.

Loss of breathing hose

Response to total loss of diluent from external boom scenario.

Loss of total Diluent supply

Response to total loss of oxygen from external boom scenario.

Loss of total O2 supply

Response to oxygen manual bypass free flow (Internal Boom).

Manual oxygen bypass free flow

Response to free flowing mixed gas manual bypass (Internal Boom).

Mixed gas manual bypass free flow

Response to muli-failures to operational system.

Operational system with multi failures

Response to partial electronics failure.

Partial electronics failure

Response to partial loop flood of exhaust side or breathing loop.

Partial loop flood

Response to primary electronics power disparity.

Primary elec power disparity tree

Response to primary electronics failure.

Primary electronics failure

Response to "something doesn't feel right"

Scamahorn fatal funnel

Response to secondary electronics power disparity.

Secondary elec power disparity tree

Response to secondary electronics failure.

Secondary electronics failure

Response to single sensor failure.

Single sensor failure

Response to oxygen solenoid free flow (Internal Boom).

Solenoid fails in open

Response to total electronics failure of both primary and secondary electronics with open circuit alternate breathing system (ABS) Option.

Total electronics failure

Response to total loop flood (TLF)

Total loop flood