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Exercise: Pump System (SFMEA) Description Function:

• Flow: 1200 gpm + 10 • Temp: 175 – 200F • System Pressure Relief at 1500 psi • Preserve Fluid Boundary Integrity

1. On the SFMEA form provided, list at least two potential functional failures of the subsystem, bearing in mind that each function may have more than one functional failure associated with it.

2. On the SFMEA form provided, list five possible failure modes of components for

any one of or all listed functional failures of the conveyor, skipping two lines between each one. (Refer to functional block diagram). Also refer to provided list of failure mode descriptors.

Life Cycle Institute • 4360 Corporate Road • Charleston, SC 29405 • 800-556-9589 • education@LCE.com • www.LCE.com

Typical Descriptors for Failure Modes *

* Adapted from "RCM - Gateway to World Class Maintenance" - Hinchcliffe/Smith 3. For each failure mode listed, input failure effects in the example SFMEA form. 4. For each failure mode listed, list failure causes on SFMEA form.

5. In the absence of real data, enter the following OCC, SEV, and DET numbers for

each failure mode in Question 1 and calculate the RPN, given:

a. Failure mode 1 – OCC = 4; SEV = 5; DET = 1

b. Failure mode 2 – OCC = 2; SEV = 3; DET = 3

c. Failure mode 3 – OCC = 3; SEV = 3; DET = 5

d. Failure mode 4 – OCC = 3; SEV = 5; DET = 5

e. Failure mode 5 – OCC = 3; SEV = 3; DET = 4

abrasion damaged lack of - ruptured arcing defective leak scored backward delaminated loose scratched out of balance deteriorated lost separated bent disconnected melted shattered binding dirty missing sheared blown disintegrated nicked shorted broken ductile notched split buckled embrittlement open sticking burned eroded overheat torn chafed exploded overtemp twisted chipped false indication overload unbonded clogged fatigue overstress unstable collapsed fluctuates overpressure warped cut frayed overspeed worn contaminated intermittent pitted corroded incorrect plugged cracked jammed punctured