The document outlines a Failure Modes and Effects Analysis (FMEA) for a control valve, detailing Risk Priority Numbers (RPN) for different failure modes related to water isolation and detection. It includes severity ratings for issues such as plugged output, delayed operation, and valve failures. A scoring consistency matrix is used to evaluate redundancy and detection methods before and after implementing changes.

1. FMEA RPN Scoring Consistency Matrix (SCM)
SEVERITY Fuel
Water -
Able to
isolate
Water -
Unable to
isolate
DETECTION
(Before)
DETECTION (After)
Isolation Control
Valve Added
DETECTION (After)
Vibration PdM
DETECTION (After)
No Redundancy/Isolation/PdM Option
Recommeded = DETECTION (Before)
Leaks 9 4 5 10 BV=10, Other =6 - 10
Plugged/No Output
No Redundancy
4 4 4 10 6 - 10
Plugged/No Output
Redundancy Available
3 3 3 10 6 - 10
Delayed Operation 1 1 1 9 6 - 9
Low/Erratic Output no PTs 1 1 1 10 6 - 10
Low/Erratic Output w/ PTs 1 1 1 4 6 - 4
Vibration 1 1 1 10 6 7 10
VALVE- Failure to Close
Unable to isolate
5 - 4 9 9 - 9
VALVE Failure to Open 3 3 3 9 6 - 9