Term
| Which valves spring load to the open position? |
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Definition
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Term
| What is the difference between the NORM and STBY modes of the Wing AI switch? |
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Definition
NORM: anti-ice controller, valves modulate to maintain temp, modulate together
STBY: thermal switches, valve cycle open/closed to maintain temp range, cycle individually |
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Term
| When are the wing and cowl AI systems auto-disabled? |
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Definition
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Term
| Which system utilizes picolo tubes? |
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Definition
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Term
| What protection does the cowl AI system have? |
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Definition
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Term
| Describe the HI/LOW positions for windshield heat? |
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Definition
HI: AI windshield, defog side windows
LOW: defog all windows |
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Term
| Why is the windshield test performed in the HI position? |
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Definition
| Testing in LOW position only tests side windows |
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Term
| Which computer monitors the probe heaters? What if it fails? |
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Definition
ADSHC (Air Data Sensor Heat Controllers)
Heaters all receive full power |
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Term
| Which probes are electrically heated (left/right side)? |
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Definition
L - pitot static, stby pitot, AOA, static port
R - pitot static, TAT, AOA, static port, Aux AOA |
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Term
| When is electric power applied to the probe heaters? |
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Definition
| Probe switch on and any gen online or pax door is locked |
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Term
| How long are the ice detectors heated? |
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Definition
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Term
| What are the differences between the wing heat and cowl AI lights? |
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Definition
Wing heat indicates sufficient heat
Cowl indicates sufficient pressure |
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Term
| What are the differences between the ANTI-ICE DUCT and WING OVHT warnings? |
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Definition
ANTI-ICE Duct: Bleed air leak - loops and sensors
WING OVHT: Wing leading edge overheat - one sensor |
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Term
| L/R WING ANTI-ICE caution |
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Definition
| Insufficient pressure and temperature |
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Term
| How are the wing and cowl anti-ice valves controlled and operated? |
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Definition
| They are electrically controlled, pneumatically operated pressure-regulating shutoff valves. |
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Term
| How is the 14th stage isolation valve controlled and operated? |
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Definition
| It is electrically controlled, pneumatically operated, and spring-loaded closed. |
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Term
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Definition
| Disagreement light, insufficient pressure with switch selected on, or cowl senses pressure with switch selected off (valve failed open) |
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