Podcast
Questions and Answers
If the wing deice boots do not inflate, and the solenoid is inoperable due to improper voltage, what is the recommended first corrective action?
If the wing deice boots do not inflate, and the solenoid is inoperable due to improper voltage, what is the recommended first corrective action?
- Replace the diaphragm.
- Correct the electrical system. (correct)
- Replace the deflate valve.
- Clean the solenoid with alcohol.
What should be checked if boots inflate slowly?
What should be checked if boots inflate slowly?
- Proper functioning of the pitot tubes.
- Condition of the deice boots.
- The fuel tank venting system.
- Lines for blockages or disconnections. (correct)
If the diaphragm is not seated correctly, what is the first corrective action you should take?
If the diaphragm is not seated correctly, what is the first corrective action you should take?
- Clean with a blunt instrument and alcohol.
- Clean with a wire of .010 diameter and alcohol. (correct)
- Check for leaks in the system.
- Ensure proper voltage.
- Replace the valve immediately.
What is a potential cause of the system not cycling?
What is a potential cause of the system not cycling?
What is a potential cause if there is no vacuum for boot hold down?
What is a potential cause if there is no vacuum for boot hold down?
Which of the following is the most likely cause of slow deflation?
Which of the following is the most likely cause of slow deflation?
What should you check if the boots appear to inflate on aircraft climb?
What should you check if the boots appear to inflate on aircraft climb?
What initial action should be taken if the wing deice boots will not deflate during the deice cycle?
What initial action should be taken if the wing deice boots will not deflate during the deice cycle?
What should be done first if the deice system is leaking?
What should be done first if the deice system is leaking?
What is the first step in addressing slow boot inflation?
What is the first step in addressing slow boot inflation?
What action should be taken if a circuit breaker is open, causing the boots to not inflate?
What action should be taken if a circuit breaker is open, causing the boots to not inflate?
Which component is most likely the cause if the diaphragm is ruptured?
Which component is most likely the cause if the diaphragm is ruptured?
What could cause an inoperative plunger in the deice system?
What could cause an inoperative plunger in the deice system?
If a dirty diaphragm seal area is causing the boots to not inflate, what is the first step for correction?
If a dirty diaphragm seal area is causing the boots to not inflate, what is the first step for correction?
When low air pump capacity is causing slow boot inflation, what corrective action should be taken?
When low air pump capacity is causing slow boot inflation, what corrective action should be taken?
If a blocked air vent in the solenoid is preventing boot inflation, what is the recommended action?
If a blocked air vent in the solenoid is preventing boot inflation, what is the recommended action?
If the listed cause is a relay not functioning, what corrective action would you take?
If the listed cause is a relay not functioning, what corrective action would you take?
What is the purpose of the 343 Test Kit mentioned in the troubleshooting guide?
What is the purpose of the 343 Test Kit mentioned in the troubleshooting guide?
What maintenance procedure should be performed if one or more deice control valves are not functioning properly causing slow boot inflation?
What maintenance procedure should be performed if one or more deice control valves are not functioning properly causing slow boot inflation?
What action should you take if a ball check in the deflate valve is inoperative, causing slow boot inflation?
What action should you take if a ball check in the deflate valve is inoperative, causing slow boot inflation?
Flashcards
Boots do not inflate: Corrective Action
Boots do not inflate: Corrective Action
Check and reset the circuit breaker.
Boots do not inflate: Deflate Valve Check
Boots do not inflate: Deflate Valve Check
In boots not inflating, check the deflate valves, correct electrical system, and clean or replace parts.
Boots do not inflate: Diaphragm Not Seated
Boots do not inflate: Diaphragm Not Seated
Clean with wire/alcohol or replace the valve.
Boots do not inflate: Corrective Action
Boots do not inflate: Corrective Action
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Slow boot inflation: Corrective Action
Slow boot inflation: Corrective Action
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Troubleshooting System Cycling Problems
Troubleshooting System Cycling Problems
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Boots will not deflate: Corrective Action
Boots will not deflate: Corrective Action
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Boots inflate during climb: Corrective Action
Boots inflate during climb: Corrective Action
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Boots inflate during climb: Vacuum lines
Boots inflate during climb: Vacuum lines
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Study Notes
- The information provided is a troubleshooting guide for a wing deice system.
- Most of the causes listed can be identified with a 343 Test Kit.
Boots Do Not Inflate
- Possible causes of boots not inflating include an open circuit breaker, faulty deflate valve, or a solenoid that is inoperable due to improper voltage or a blocked air vent.
- An inoperative plunger or a diaphragm that is not seated correctly, which could be due to a blocked vent or dirty seal area, can also cause the boots to not inflate, as can a ruptured diaphragm.
- Other causes can include faulty deice control valves, a faulty check valve, a relay not functioning, or a leak in the system boots.
- Corrective actions: Reset circuit breaker, check/correct deflate valves, clean/replace valve assembly, replace check valve, or repair as needed.
Slow Boot Inflation
- Possible causes of slow boot inflation include blocked or disconnected lines, low air pump capacity, one or more deice control valves not functioning properly, or a deflate valve not fully closed.
- An inoperative ball check in the deflate valve or leaks in the system/boots can also lead to slow inflation.
- Corrective actions: Check/replace lines, replace air pump, clean/replace valve assembly, clean check valve/replace deflate valve, or repair as needed.
System Will Not Cycle
- Possible causes of the system not cycling include pressure in the system not reaching the specified PSI to activate the pressure switch
- Additional causes can include a leak in the system/boots or a pressure switch on the deflate valve being inoperative.
- Corrective actions: Clean/replace deice control valve, clean/replace deflate valve, repair as needed (tighten hose connections), or replace the switch.
Slow Deflation
- Possible causes of slow deflation include low vacuum, or a faulty deflate valve indicated by temporary reduction in suction gauge reading.
- Corrective actions: Repair as needed, clean or replace valve assembly as noted.
No Vacuum for Boot Hold Down
- Possible causes includes a malfunctioning deflate valve or deice valve or a leak in system or boots
- Corrective actions: Clean or replace valve assembly, or repair as needed.
Boots Will Not Deflate During Cycle
- Possible cause: Faulty deflate valve
- Corrective action: Check and replace valve
Boots Appear to Inflate on Aircraft Climb
- Possible cause: vacuum source for boot holddown inoperative or vacuum lines running through pressurized cabin loose or disconnected.
- Corrective actions: Check operation of ball check in deflate valve, or check for loose or disconnected vacuum lines and repair.
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