6.2 - Assignment- Case Study 5- Part 1 - Fault Hazard Analysis.pdf

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Unformatted text preview: SYSTEM FUNCTIONAL FAULT HAZARD ANALYSIS (FHA) Use the risk matrix on page 20 in the textbook to determine risk assessment codes (RAC) while completing the following: 1. Construct a System Functional Fault Hazard Analysis worksheet with at least two (2) system components, utilizing textbook process. 2. Complete a risk assessment for four (4) of the identified components and perform a risk assessment including the following information. PROGRAM: Manufacturing DATE: 2-18-2018 SUBSYSTEM/SYSTEM: Hydraulics ENGINEER: Justin Williams SYSTEM COMPONENT NOMENCLATURE HAZARD MODE DESCRIPTION PAGE: 1 SYSTEM OPERATING MODE/PHASE EFFECT OF HAZARD ON OTHER SYSTEM Flaps Slats Landing gear wheel brakes Steering Autopilot Hydraulic Tank Lost of proportional hydraulic Pressure 1.Maneuverin g of Movement systems 2.Manevering of wheels locking positions Paired Cables Lost of tension along the pulley system 1.Movement N/A of the ailerons, Rudders and Elevators FAILURE CONDITION (EFFECT ON OVERALL SYSTEM) HAZARD SEVERITY CLASS OTHER FACTORS INFLUENCING HAZARD EFFECTS Plane has N/A no ability to maneuver in the air Likely to result in death or injury 1A N/A renovating the structure of the hydraulic tank and components Plane has N/A no ability to maneuver in the air Likely to result in death or injury 1A N/A Addition paired cables to back up broken ones SFTY 440 ENVIRONMENTAL FACTORS HAZARD CONTROL APPROACH SYSTEM FUNCTIONAL FAULT HAZARD ANALYSIS (FHA) Hazard Risk: LOSS OF PRESURE: A small leak in the hydraulic cylinders twill cause a loss of pressure for the system that operate the Ailerons, Elevators and Rudders. With any damage to the cylinder could cause and elevate the pressure integrity and if there aren't any pressure recovery systems the pilot will have to manually operate the Ailerons, Elevators and Rudders. DEFECTIVE CIRCUIT: Same as LOSS OF PRESSURE BROKEN CABLES: While it is subjected to wear and deterioration and remain in static positions around pulley bends for extended periods of time while the aircraft sits. If any frayed wires of the 6x19 cables appear it indicated much more tension will be displaced among the intact wires. These wires are tested for the same amount that the broken wire was and will soon snap as well leaving a domino effect. Risk Assessment (refer to Tables 2.1 - 2.3 in Chapter 2): LOSS OF PRESURE:The hydraulic pressure bleed of rates will cause the aircraft to continue to maneuver at its preset rates if the pressure was still the same. This could lead to insufficient climb/descend rate, roll degrees and improper vector directions. These improper ratings would most definitely lead to lost of controls resulting in Injury or Death. A severity level of Catastrophic has been assigned and a probability of occurrence level of frequent has been determined. DEFECTIVE CIRCUIT: same as LOSS OF PRESSURE BROKEN CABLES: The pulley system with in the aircraft would continue to add stress to the cables and eventually snap the whole cable. In the event of this happening the control system would be defective and leave no response from the pilot controls.Lost of controls resulting in Injury or Death. A severity level of Catastrophic has been assigned and a probability of occurrence level of remote has been determined. Control Approach: LOSS OF PRESURE: Fly by wire in this case of failure DEFECTIVE CIRCUIT: Additional independent hydraulic System BROKEN CABLES: Independent back up cables in case of breakage SFTY 440 ...
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