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17 Cards in this Set
- Front
- Back
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What is the APU normal governing speed? |
94.5%-101% RPM+/-0.5 |
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How long should the APU operate before APU bleed load is selected? |
2 |
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During APU start (up to 50% RPM) what is the maximum allowable time for the EGT can be above 870C, before the APU must be shut down (Hot Start)? |
10 sec |
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How do you prevent unintentional pressurization with the APU bleed air on? |
Document Hatch open |
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If no increase EGT is indicated and RPM stagnates at about ____% for more than ___ seconds, abort start by pressing APU stop button. (hung start) |
30-50%, 15 seconds |
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What are the APU starter cranking limitations? |
3 consecutive starts or start attempts with a 90 second maximum combined |
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Normal APU oil pressure at governing speed, should be |
45 PSIG +/- 10 PSIG |
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Maximum APU oil temperature is |
135 degrees C |
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With bleed load selected, what is the maximum EGT limitation? |
680 C |
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You should avoid selecting both ECS packs on until the APU load is below, what? |
300A |
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When is a restart of the APU allowed? |
After complete roll down (below 10% RPM) and 2 minutes after APU master switch to off |
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What systems must be operational before APU start |
Central display System, Intergrated Avionic Computers, Central Warning |
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What is the variation for governer speed steady state |
.5% |
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How many consecutive Hot Starts require a Hot Section Inspection |
2 |
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After the exchange of the APU, it must be operated for _____ minutes without connecting APU bleed air |
20 |
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Under what APU RPM percentage can you turn off the APU Master button |
10% |
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APU Fire Emergency Procedures (Verbatim) |
APU Fire Button ------- Lift Cover/Push
After 10 seconds: Squib Button -------- Push/Check DIS Illuminated light illuminated APU Master --------- Off Button |
