Your SlideShare is downloading. ×
0
MENU PRINCIPAL
FIRST, WE WILL REVIEW THE PURPOSE OF THE AIR CONDITIONING SYSTEM AND EXAMINETHE MAJOR COMPONENTS IN DETAIL. WE WILL THEN S...
THE AIR CONDITIONING SYSTEM REGULATES THE DISTRIBUTION OF AIR, WITHIN ACOMFORTABLE TEMPERATURE RANGE, TO THE PASSENGER CAB...
AIR FROM ANY PNEUMATIC SOURCE IS HOT AND MUST BE CONDITIONED. AIRCONDITIONING IS ACCOMPLISHED IN THE LEFT AND RIGHT PACK. ...
CONDITIONED AIR FROM THE PACKS IS THEN SUPPLIED TO THE COCKPIT ANDPASSENGER CABIN. A GROUND CART MAY ALSO PROVIDE CONDITIO...
HOT AIR ENTERS THE PACK THROUGH THE PACK VALVE. A PORTION OF THE HOT AIRBYPASSES THE COOLING PROCESS. THE REMAINING HOT AI...
AFTER ENTERING THE PACK VALVE, HOT AIR IS COOLED BY FORCING IT THROUGH AHEAT EXCHANGER, (pause2) A COMPRESSOR, (pause2) A ...
NOTICE THAT THE COMPRESSOR AND TURBINE ARE ON THE SAME SHAFT. THIS UNIT ISCALLED AN AIR CYCLE MACHINE AND IS POWERED ONLY ...
ALL OF THE RAM AIR, WHICH COOLS THE HEAT EXCHANGERS, IS EXHAUSTEDOVERBOARD. NONE OF THE RAM AIR ENTERS THE AIR CONDITIONIN...
WE WILL NOW EXAMINE THE RAM AIR SYSTEM, HEAT EXCHANGERS AND AIR CYCLEMACHINE.MENU PRINCIPAL
ON THIS SLIDE, THE TWO TOP AMBER ARROWS INDICATE THE LOCATION OF THE RAM AIRINLET DOORS AND DEFLECTORS. DURING GROUND OPER...
THE DEFLECTOR AND RAM-AIR INLET DOORS ARE AUTOMATICALLY OPERATED BY ANELECTRIC MOTOR. WHEN THE INLET DOOR OPENS, THE EXHAU...
THE POSITION OF THE DEFLECTORS IS CONTROLLED BY THE AIR-GROUND SAFETYSENSOR. ON THE GROUND, THE DEFLECTORS EXTEND. THEY AU...
AIR INLET DOORS CONTROL THE AMOUNT OF COOLING AIR FOR THE HEAT EXCHANGERS.WHENEVER THE AIRPLANE IS ON THE GROUND, OR THE F...
ON THE GROUND, OR WHEN THE FLAPS ARE EXTENDED, A VALVE OPENS ALLOWING AIRFROM THE PNEUMATIC SYSTEM TO POWER A TURBO FAN. T...
IN FLIGHT, WITH THE FLAPS RETRACTED, THE POSITION OF THE AIR INLET DOORS ISCONTROLLED BY THE OPERATING TEMPERATURE OF THE ...
A IS THE CORRECT ANSWER.MENU PRINCIPAL
THE RAM-AIR INLET DOORS REMAIN FULL OPEN ANY TIME THE AIRPLANE IS ON THEGROUND, OR THE FLAPS ARE EXTENDED IN FLIGHT. THEY ...
THE PRIMARY HEAT EXCHANGER COOLS HOT BLEED AIR BEFORE IT FLOWS TO ACOMPRESSOR. (pause2) IN THE COMPRESSOR, THE TEMPERATURE...
THE HOT AIR FROM THE COMPRESSOR FLOWS THROUGH THE SECONDARY HEATEXCHANGER (pause2) COOLS (pause2) AND THEN PASSES INTO THE...
AIR-MIX-VALVES REGULATE THE CORRECT AMOUNT OF HOT AND COLD AIR ENTERING AMIXING CHAMBER. (pause2) CHECK VALVES ENSURE THE ...
TEMPERATURE IS SENSED IN THE PASSENGER CABIN. THE RIGHT PACK AUTO AIRTEMPERATURE CONTROLLER POSITIONS THE AIR MIX VALVES T...
ANSWER B IS CORRECT.MENU PRINCIPAL
A GROUND CART CAN BE CONNECTED DIRECTLY TO THE SUPPLY DUCT TO PROVIDECONDITIONED AIR. IT DOES NOT GO THROUGH EITHER OF THE...
A WATER SEPARATOR DOWNSTREAM OF THE AIR CYCLE MACHINE REMOVES WATERFROM THE AIR SO THAT MOISTURE IS NOT CARRIED INTO THE D...
A MAIN SUPPLY DUCT CONNECTS THE OUTPUT OF THE LEFT AND RIGHT PACKS. (pause2)THEREFORE, EITHER PACK CAN SUPPLY THE COCKPIT ...
COCKPIT AND PASSENGER CABIN AIR FLOW IS USED TO HEAT THE FORWARD AND AFTCARGO COMPARTMENTS, AND IS THEN DISCHARGED OVERBOA...
THE CIRCUIT BREAKER PANEL, INSTRUMENT PANELS, AND THE ELECTRONIC EQUIPMENTCOMPARTMENT, ARE COOLED BY AIR FLOW FROM THE COC...
THE NORMAL POSITION OF THE EQUIPMENT COOLING SWITCH OPERATES THE MAIN EQUIPMENTCOOLING BLOWER. THE MAIN BLOWER IS POWERED ...
ON THE GROUND, AND AT LOW ALTITUDES, THE AIR IS DISCHARGED OVERBOARDTHROUGH A FLOW-CONTROL VALVE ON THE BOTTOM OF THE AIRP...
ANSWER IS A IS CORRECT.MENU PRINCIPAL
THE LEFT PACK IS THE PRIMARY SOURCE OF AIR TO THE COCKPIT. (pause3) NOW, LETSDISCUSS THE GASPER AIR SYSTEM.MENU PRINCIPAL
THE GASPER AIR DUCT AND FAN ARE LOCATED JUST BEYOND THE WATER SEPARATORON THE RIGHT AIR CONDITIONING PACK. THE SYSTEM NORM...
THE GASPER FAN INCREASES THE FLOW OF COLD AIR TO INDIVIDUAL GASPER OUTLETSTHROUGHOUT THE AIRPLANE. THE FAN MAY BE OPERATED...
WHEN THE RIGHT PACK IS NOT OPERATING, THE GASPER SYSTEM DRAWS COCKPIT ANDCABIN AIR BACK THROUGH THE SUPPLY DUCT, AND RE-CI...
A CONDITIONED AIR CART MAY BE CONNECTED DIRECTLY TO THE MAIN SUPPLY DUCT(pause2) WHEN MINIMAL AIR CONDITIONING IS REQUIRED...
THE AIR CONDITIONING CONTROLS AND INDICATORS ARE LOCATED ON THE FORWARDOVERHEAD PANEL. LOCATE THESE ON YOUR PANEL.MENU PRI...
THE CONTROLS AND INDICATORS FOR THE LEFT AND RIGHT PACKS ARE IDENTICAL.(pause4) LETS DISCUSS THE OPERATION OF THE RIGHT PA...
THE AIR CONDITIONING PACK SWITCH CONTROLS THE OPERATION OF THE PACK VALVE.POSITIONING THE SWITCH []ON, ALLOWS BLEED-AIR FR...
THE GASPER FAN IS CONTROLLED BY A SWITCH ON THE PNEUMATIC PANEL.MENU PRINCIPAL
THERE ARE TWO TEMPERATURE CONTROLLERS (pause2) ONE FOR THE CONTROL CABINOR COCKPIT, AND ONE FOR THE PASSENGER CABIN. EACH ...
THE TEMPERATURE SELECTOR IS USED TO SET THE DESIRED TEMPERATURE. (pause2) ANAUTO AIR TEMPERATURE CONTROLLER COMPARES THE D...
TO PREVENT EXCESSIVE TEMPERATURES IN THE SUPPLY DUCT, A TEMPERATURE-LIMITING SENSOR WILL PREVENT ANY PACK FROM EXCEEDING 6...
MOVING THE TEMPERATURE SELECTOR TO THE LOWER SEGMENT ESTABLISHES MANUALCONTROL (pause2) IN MANUAL, THE SELECTOR IS SPRING ...
WHEN A PACK IS TURNED []OFF, THE PACK VALVE CLOSES (pause2), AND THE AIR-MIX-VALVES MOVE TO THE FULL COLD POSITION. (pause...
THE AIR TEMPERATURE INDICATOR REFLECTS THE TEMPERATURE OF THE LEFT ORRIGHT PACK, SUPPLY DUCT, OR THE PASSENGER CABIN, AS S...
ANSWER C IS CORRECT.MENU PRINCIPAL
WHENEVER A PACK IS TURNED []OFF, THE AIR-MIX-VALVES MOVE TO FULL COLD. THISALLOWS ALL OF THE AIR TO BE INITIALLY DIRECTED ...
WHEN THE AIRPLANE IS ON THE GROUND, THE RAM AIR INLET DOORS ARE FULL OPENAND THE RAM-DOOR-FULL OPEN LIGHTS ILLUMINATE.MENU...
THE RAM DOOR FULL OPEN LIGHTS REMAIN ILLUMINATED WHILE THE FLAPS AREEXTENDED.MENU PRINCIPAL
IN-FLIGHT, WHEN THE FLAPS ARE RETRACTED, THE AUTOMATIC TEMPERATURECONTROL TAKES OVER AND THE RAM-DOOR-FULL-OPEN LIGHTS EXT...
ANSWER B IS CORRECT.MENU PRINCIPAL
WHEN FLAPS ARE EXTENDED DURING DESCENT, THE RAM-AIR-INLET-DOORSAUTOMATICALLY DRIVE FULL OPEN. THIS ENSURES PROPER COOLING ...
HERE ARE THE STEPS NECESSARY TO AIR CONDITION THE AIRPLANE ON THE GROUND,USING EITHER THE APU OR A PNEUMATIC GROUND CART.M...
FIRST, POSITION THE TEMPERATURE INDICATOR SELECTOR TO SUPPLY DUCT. THISPERMITS THE CREW TO MONITOR THE TEMPERATURE OF THE ...
THEN, POSITION THE RIGHT PACK SWITCH TO []ON AND, AFTER A FEW SECONDS,OBSERVE THE DUCT PRESSURE DECREASE. POSITIONING THE ...
FINALLY, IF ADDITIONAL AIR IS REQUIRED AT THE GASPER OUTLETS, PLACE THE GASPERFAN SWITCH []ON.MENU PRINCIPAL
REVIEW THE PROCEDURES ASSOCIATED WITH THE USE OF THE APU OR PNEUMATICGROUND CART IN THE SUPPLEMENTARY PROCEDURES SECTION O...
B IS THE CORRECT ANSWER. TO OBTAIN SATISFACTORY HEATING FROM BOTH PACKS,THE APU MUST BE CAPABLE OF MAINTAINING BETWEEN 20 ...
THIS COMPLETES THE NORMAL OPERATIONS SECTION OF AIR CONDITIONING. THE NEXTSECTION DEALS WITH PRESSURIZATION.MENU PRINCIPAL...
Upcoming SlideShare
Loading in...5
×

Air conditions & pressurization part 1

1,018

Published on

0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
1,018
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
80
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

Transcript of "Air conditions & pressurization part 1"

  1. 1. MENU PRINCIPAL
  2. 2. FIRST, WE WILL REVIEW THE PURPOSE OF THE AIR CONDITIONING SYSTEM AND EXAMINETHE MAJOR COMPONENTS IN DETAIL. WE WILL THEN SEE HOW THE SYSTEM ISCONTROLLED AND MONITORED.MENU PRINCIPAL
  3. 3. THE AIR CONDITIONING SYSTEM REGULATES THE DISTRIBUTION OF AIR, WITHIN ACOMFORTABLE TEMPERATURE RANGE, TO THE PASSENGER CABIN AND COCKPIT.(pause2) IT ALSO PROVIDES VENTILATION FOR THE ELECTRICAL AND ELECTRONICSCOMPARTMENT (pause2) AND DIRECTS AIR FLOW TO WARM THE CARGOCOMPARTMENTS. (pause4) NOW, LETS REVIEW THE MAJOR COMPONENTS.MENU PRINCIPAL
  4. 4. AIR FROM ANY PNEUMATIC SOURCE IS HOT AND MUST BE CONDITIONED. AIRCONDITIONING IS ACCOMPLISHED IN THE LEFT AND RIGHT PACK. ENGINE ONE IS THENORMAL IN-FLIGHT AIR SOURCE FOR THE LEFT PACK. ENGINE TWO SUPPLIES THE RIGHTPACK. ON THE GROUND, THE APU OR THE PNEUMATIC GROUND CART CAN SUPPLYEITHER PACK.MENU PRINCIPAL
  5. 5. CONDITIONED AIR FROM THE PACKS IS THEN SUPPLIED TO THE COCKPIT ANDPASSENGER CABIN. A GROUND CART MAY ALSO PROVIDE CONDITIONED AIR. THIS AIRCANNOT BE CONTROLLED FROM THE COCKPIT. (pause2) LETS STUDY A SINGLE PACK INDETAIL.MENU PRINCIPAL
  6. 6. HOT AIR ENTERS THE PACK THROUGH THE PACK VALVE. A PORTION OF THE HOT AIRBYPASSES THE COOLING PROCESS. THE REMAINING HOT AIR IS COOLED. THERESULTING COLD AIR AND HOT AIR ARE THEN MIXED TO OBTAIN CONDITIONED AIR ATTHE DESIRED TEMPERATURE. (pause4) LETS LOOK AT THE COOLING PROCESS.MENU PRINCIPAL
  7. 7. AFTER ENTERING THE PACK VALVE, HOT AIR IS COOLED BY FORCING IT THROUGH AHEAT EXCHANGER, (pause2) A COMPRESSOR, (pause2) A SECOND HEAT EXCHANGER,(pause2) AND A TURBINE. TRACE THE PATH OF THE HOT AIR AS IT IS COOLED.MENU PRINCIPAL
  8. 8. NOTICE THAT THE COMPRESSOR AND TURBINE ARE ON THE SAME SHAFT. THIS UNIT ISCALLED AN AIR CYCLE MACHINE AND IS POWERED ONLY BY THE FORCE OF THE AIRBEING PUSHED THROUGH IT.MENU PRINCIPAL
  9. 9. ALL OF THE RAM AIR, WHICH COOLS THE HEAT EXCHANGERS, IS EXHAUSTEDOVERBOARD. NONE OF THE RAM AIR ENTERS THE AIR CONDITIONING SYSTEM.MENU PRINCIPAL
  10. 10. WE WILL NOW EXAMINE THE RAM AIR SYSTEM, HEAT EXCHANGERS AND AIR CYCLEMACHINE.MENU PRINCIPAL
  11. 11. ON THIS SLIDE, THE TWO TOP AMBER ARROWS INDICATE THE LOCATION OF THE RAM AIRINLET DOORS AND DEFLECTORS. DURING GROUND OPERATION, THE DEFLECTORS AREEXTENDED TO PREVENT FOREIGN OBJECT DAMAGE TO THE HEAT EXCHANGERS. THEDEFLECTORS ARE AUTOMATICALLY RETRACTED AFTER LIFT OFF. THE YELLOW ARROWSLOCATE THE RAM-AIR EXHAUST LOUVERS. THESE DOORS REGULATE AIR FLOWTHROUGH THE HEAT EXCHANGERS.MENU PRINCIPAL
  12. 12. THE DEFLECTOR AND RAM-AIR INLET DOORS ARE AUTOMATICALLY OPERATED BY ANELECTRIC MOTOR. WHEN THE INLET DOOR OPENS, THE EXHAUST LOUVERS OPEN.(pause2) WHEN THE INLET DOOR CLOSES, THE EXHAUST LOUVERS CLOSE.MENU PRINCIPAL
  13. 13. THE POSITION OF THE DEFLECTORS IS CONTROLLED BY THE AIR-GROUND SAFETYSENSOR. ON THE GROUND, THE DEFLECTORS EXTEND. THEY AUTOMATICALLY RETRACTAT LIFT OFF.MENU PRINCIPAL
  14. 14. AIR INLET DOORS CONTROL THE AMOUNT OF COOLING AIR FOR THE HEAT EXCHANGERS.WHENEVER THE AIRPLANE IS ON THE GROUND, OR THE FLAPS ARE EXTENDED IN-FLIGHT,THE RAM AIR INLET DOORS, AND THE EXHAUST LOUVERS, ARE AUTOMATICALLYPOSITIONED FULL OPEN.MENU PRINCIPAL
  15. 15. ON THE GROUND, OR WHEN THE FLAPS ARE EXTENDED, A VALVE OPENS ALLOWING AIRFROM THE PNEUMATIC SYSTEM TO POWER A TURBO FAN. THE TURBO FAN DRAWS AIRFLOW THROUGH THE HEAT EXCHANGERS FOR MAXIMUM COOLING.MENU PRINCIPAL
  16. 16. IN FLIGHT, WITH THE FLAPS RETRACTED, THE POSITION OF THE AIR INLET DOORS ISCONTROLLED BY THE OPERATING TEMPERATURE OF THE AIR CYCLE MACHINE.MENU PRINCIPAL
  17. 17. A IS THE CORRECT ANSWER.MENU PRINCIPAL
  18. 18. THE RAM-AIR INLET DOORS REMAIN FULL OPEN ANY TIME THE AIRPLANE IS ON THEGROUND, OR THE FLAPS ARE EXTENDED IN FLIGHT. THEY MODULATE TOWARD CLOZEWHEN THE AIRPLANE []is []in []ann []in flight, CLEAN CONDITION.MENU PRINCIPAL
  19. 19. THE PRIMARY HEAT EXCHANGER COOLS HOT BLEED AIR BEFORE IT FLOWS TO ACOMPRESSOR. (pause2) IN THE COMPRESSOR, THE TEMPERATURE OF THE BLEED AIRINCREASES.MENU PRINCIPAL
  20. 20. THE HOT AIR FROM THE COMPRESSOR FLOWS THROUGH THE SECONDARY HEATEXCHANGER (pause2) COOLS (pause2) AND THEN PASSES INTO THE TURBINE STAGE,WHERE IT ROTATES THE TURBINE AND IS RAPIDLY EXPANDED. THIS RAPID EXPANSIONCAUSES A LARGE TEMPERATURE DROP, PRODUCING VERY COLD AIR. (pause3) NOTICEAGAIN THAT THE TURBINE AND COMPRESSOR HAVE A COMMON SHAFT, AND THAT THETURBINE POWERS THE COMPRESSOR. THE ONLY POWER SOURCE FOR THE AIR CYCLEMACHINE IS THE AIR BEING PUSHED THROUGH IT.MENU PRINCIPAL
  21. 21. AIR-MIX-VALVES REGULATE THE CORRECT AMOUNT OF HOT AND COLD AIR ENTERING AMIXING CHAMBER. (pause2) CHECK VALVES ENSURE THE PROPER DIRECTION OF FLOW.MENU PRINCIPAL
  22. 22. TEMPERATURE IS SENSED IN THE PASSENGER CABIN. THE RIGHT PACK AUTO AIRTEMPERATURE CONTROLLER POSITIONS THE AIR MIX VALVES TO MAINTAIN SELECTEDCABIN TEMPERATURE. A TEMPERATURE SENSOR IN THE COCKPIT SIGNALS THE LEFTPACK TEMPERATURE CONTROLLER TO MAINTAIN SELECTED COCKPIT TEMPERATURE.MENU PRINCIPAL
  23. 23. ANSWER B IS CORRECT.MENU PRINCIPAL
  24. 24. A GROUND CART CAN BE CONNECTED DIRECTLY TO THE SUPPLY DUCT TO PROVIDECONDITIONED AIR. IT DOES NOT GO THROUGH EITHER OF THE PACKS AND CANNOT BECONTROLLED FROM THE COCKPIT.MENU PRINCIPAL
  25. 25. A WATER SEPARATOR DOWNSTREAM OF THE AIR CYCLE MACHINE REMOVES WATERFROM THE AIR SO THAT MOISTURE IS NOT CARRIED INTO THE DISTRIBUTION SYSTEM.(pause3) A TEMPERATURE SENSOR IN THE WATER SEPARATOR SIGNALS A CONTROLLERTO AUTOMATICALLY MODULATE AN ANTI-ICE VALVE. THIS VALVE ROUTES WARM AIR TOTHE SEPARATOR TO PREVENT IT FROM FREEZING. (pause3) LETS DISCUSS THEDISTRIBUTION SYSTEM NEXT.MENU PRINCIPAL
  26. 26. A MAIN SUPPLY DUCT CONNECTS THE OUTPUT OF THE LEFT AND RIGHT PACKS. (pause2)THEREFORE, EITHER PACK CAN SUPPLY THE COCKPIT OR PASSENGER CABIN. (pause3)THE LEFT PACK IS THE NORMAL INPUT TO THE COCKPIT. SINCE ONLY A SMALL PORTIONOF THE AIR IS REQUIRED FOR THE COCKPIT, THE REMAINING AIR IS DISTRIBUTED TO THEPASSENGER CABIN. THE RIGHT PACK IS THE PRIMARY AIR SOURCE FOR THE PASSENGERCABIN. THE PASSENGER CABIN AIR IS DISTRIBUTED EVENLY THROUGH A SINGLEOVERHEAD OUTFLOW DUCT RUNNING THE LENGTH OF THE CABIN.MENU PRINCIPAL
  27. 27. COCKPIT AND PASSENGER CABIN AIR FLOW IS USED TO HEAT THE FORWARD AND AFTCARGO COMPARTMENTS, AND IS THEN DISCHARGED OVERBOARD. (pause4) NOW, LETSLOOK BRIEFLY AT THE AIR FLOW FROM THE ELECTRONIC EQUIPMENT COOLING.MENU PRINCIPAL
  28. 28. THE CIRCUIT BREAKER PANEL, INSTRUMENT PANELS, AND THE ELECTRONIC EQUIPMENTCOMPARTMENT, ARE COOLED BY AIR FLOW FROM THE COCKPIT. COOLING AIR IS DRAWNBEHIND THE COCKPIT PANELS, AND THROUGH THE ELECTRONICS COMPARTMENT BY ABLOWER SYSTEM WHICH OPERATES ANYTIME AC POWER IS AVAILABLE TO THEGENERATOR BUSES.MENU PRINCIPAL
  29. 29. THE NORMAL POSITION OF THE EQUIPMENT COOLING SWITCH OPERATES THE MAIN EQUIPMENTCOOLING BLOWER. THE MAIN BLOWER IS POWERED BY 115 VOLTS AC FROM THE NUMBER ONEGENERATOR BUS. IN THE EVENT OF LOSS OF COOLING AIR FLOW DUE TO THE FAILURE OF THEMAIN BLOWER, THE ALTERNATE POSITION OF THE SWITCH OPERATES THE ALTERNATE COOLINGBLOWER. THE ALTERNATE BLOWER IS POWERED BY 115 VOLTS AC FROM NUMBER TWOGENERATOR BUS. AN AMBER [`]OFF LIGHT, WHEN ILLUMINATED, INDICATES THAT THE COOLINGAIR FLOW IS INSUFFICIENT. FOR ALL NORMAL OPERATIONS, THE AMBER [`]OFF LIGHT ISEXTINGUISHED.MENU PRINCIPAL
  30. 30. ON THE GROUND, AND AT LOW ALTITUDES, THE AIR IS DISCHARGED OVERBOARDTHROUGH A FLOW-CONTROL VALVE ON THE BOTTOM OF THE AIRPLANE. AT HIGHERALTITUDES THIS AIR IS DIRECTED TO THE FORWARD CARGO COMPARTMENT FORHEATING. THIS IS COVERED IN MORE DETAIL IN PART TWO OF THIS [sahbjhehkt].MENU PRINCIPAL
  31. 31. ANSWER IS A IS CORRECT.MENU PRINCIPAL
  32. 32. THE LEFT PACK IS THE PRIMARY SOURCE OF AIR TO THE COCKPIT. (pause3) NOW, LETSDISCUSS THE GASPER AIR SYSTEM.MENU PRINCIPAL
  33. 33. THE GASPER AIR DUCT AND FAN ARE LOCATED JUST BEYOND THE WATER SEPARATORON THE RIGHT AIR CONDITIONING PACK. THE SYSTEM NORMALLY EXTRACTS COLD AIRFROM THE OUTPUT OF THE RIGHT PACK.MENU PRINCIPAL
  34. 34. THE GASPER FAN INCREASES THE FLOW OF COLD AIR TO INDIVIDUAL GASPER OUTLETSTHROUGHOUT THE AIRPLANE. THE FAN MAY BE OPERATED CONTINUOUSLY IF DESIRED.MENU PRINCIPAL
  35. 35. WHEN THE RIGHT PACK IS NOT OPERATING, THE GASPER SYSTEM DRAWS COCKPIT ANDCABIN AIR BACK THROUGH THE SUPPLY DUCT, AND RE-CIRCULATES IT THROUGH THEINDIVIDUAL GASPER OUTLETS.MENU PRINCIPAL
  36. 36. A CONDITIONED AIR CART MAY BE CONNECTED DIRECTLY TO THE MAIN SUPPLY DUCT(pause2) WHEN MINIMAL AIR CONDITIONING IS REQUIRED. THIS ENABLES THE AIRPLANETO BE HEATED OR COOLED, WITHOUT OPERATING AN AIR CONDITIONING PACK.MENU PRINCIPAL
  37. 37. THE AIR CONDITIONING CONTROLS AND INDICATORS ARE LOCATED ON THE FORWARDOVERHEAD PANEL. LOCATE THESE ON YOUR PANEL.MENU PRINCIPAL
  38. 38. THE CONTROLS AND INDICATORS FOR THE LEFT AND RIGHT PACKS ARE IDENTICAL.(pause4) LETS DISCUSS THE OPERATION OF THE RIGHT PACK.MENU PRINCIPAL
  39. 39. THE AIR CONDITIONING PACK SWITCH CONTROLS THE OPERATION OF THE PACK VALVE.POSITIONING THE SWITCH []ON, ALLOWS BLEED-AIR FROM THE PNEUMATIC DUCT TOOPEN THE PACK VALVE, AND THEN FLOW INTO THE PACK. IF THE TEMPERATURE IN THEPACK IS EXCESSIVE, THE VALVE AUTOMATICALLY CLOSES, AND THE PACK TRIP-OFFLIGHT ILLUMINATES.MENU PRINCIPAL
  40. 40. THE GASPER FAN IS CONTROLLED BY A SWITCH ON THE PNEUMATIC PANEL.MENU PRINCIPAL
  41. 41. THERE ARE TWO TEMPERATURE CONTROLLERS (pause2) ONE FOR THE CONTROL CABINOR COCKPIT, AND ONE FOR THE PASSENGER CABIN. EACH TEMPERATURE CONTROLLERHAS TWO MODES OF OPERATION, AUTOMATIC AND MANUAL. (pause4) LETS LOOK AT THEAUTOMATIC MODE OF THE CONTROLLER FOR THE PASSENGER CABIN.MENU PRINCIPAL
  42. 42. THE TEMPERATURE SELECTOR IS USED TO SET THE DESIRED TEMPERATURE. (pause2) ANAUTO AIR TEMPERATURE CONTROLLER COMPARES THE DESIRED TEMPERATURE, WITH THETEMPERATURE SENSED IN THE CABIN. THE CONTROLLER SIGNALS THE AIR-MIX VALVES TOMAINTAIN THE SELECTED TEMPERATURE. THE POSITION OF THE TWO AIR-MIX VALVES ISDISPLAYED ON A SINGLE POINTER INDICATOR LABELED COLD AND HOT, WHICH INDICATESTHE CONDITION OF THE AIR AS IT LEAVES THE MIXING CHAMBER. (pause2) A DUCT OVERHEATLIGHT WILL ILLUMINATE IF THE TEMPERATURE IN THE SUPPLY DUCT IS EXCESSIVE. THISINDICATION WILL BE DISCUSSED IN NON-NORMAL OPERATIONS. THE CONTROL CABINTEMPERATURE SELECTOR CONTROLS THE LEFT PACK IN THE SAME MANNER.MENU PRINCIPAL
  43. 43. TO PREVENT EXCESSIVE TEMPERATURES IN THE SUPPLY DUCT, A TEMPERATURE-LIMITING SENSOR WILL PREVENT ANY PACK FROM EXCEEDING 60 DEGREESCENTIGRADE. WHEN THIS TEMPERATURE IS APPROACHED, THE MIX VALVESAUTOMATICALLY MOVE TOWARD COLD UNTIL AN OPERATING TEMPERATURE BELOW 60DEGREES CENTIGRADE CAN BE MAINTAINED. (pause2) NOW, LETS LOOK AT THE MANUALMODE OF OPERATION.MENU PRINCIPAL
  44. 44. MOVING THE TEMPERATURE SELECTOR TO THE LOWER SEGMENT ESTABLISHES MANUALCONTROL (pause2) IN MANUAL, THE SELECTOR IS SPRING LOADED TO THE CENTER[`]OFF POSITION. TO CHANGE THE TEMPERATURE, ROTATE AND HOLD THE SELECTOR TOEITHER WARM OR COOL. THE MOVEMENT OF THE MIX VALVES WILL BE DISPLAYED ONTHE AIR-MIX VALVE POSITION INDICATOR. RELEASING THE SELECTOR STOPS THE VALVEMOVEMENT.MENU PRINCIPAL
  45. 45. WHEN A PACK IS TURNED []OFF, THE PACK VALVE CLOSES (pause2), AND THE AIR-MIX-VALVES MOVE TO THE FULL COLD POSITION. (pause4) LETS EXAMINE THE TEMPERATUREINDICATOR.MENU PRINCIPAL
  46. 46. THE AIR TEMPERATURE INDICATOR REFLECTS THE TEMPERATURE OF THE LEFT ORRIGHT PACK, SUPPLY DUCT, OR THE PASSENGER CABIN, AS SELECTED BY THE SOURCESELECTOR SWITCH. THE SUPPLY DUCT AND PASSENGER CABIN SELECTIONS PERMITSTHE TEMPERATURES IN THESE AREAS TO BE MONITORED. THE SELECTOR IS USUALLYLEFT IN SUPPLY DUCT.MENU PRINCIPAL
  47. 47. ANSWER C IS CORRECT.MENU PRINCIPAL
  48. 48. WHENEVER A PACK IS TURNED []OFF, THE AIR-MIX-VALVES MOVE TO FULL COLD. THISALLOWS ALL OF THE AIR TO BE INITIALLY DIRECTED THROUGH THE AIR CYCLE MACHINETHE NEXT TIME THE PACK IS TURNED []ON. (pause3) NEXT, LETS LOOK AT THEINDICATOR LIGHTS FOR THE RAM AIR INLET DOORS.MENU PRINCIPAL
  49. 49. WHEN THE AIRPLANE IS ON THE GROUND, THE RAM AIR INLET DOORS ARE FULL OPENAND THE RAM-DOOR-FULL OPEN LIGHTS ILLUMINATE.MENU PRINCIPAL
  50. 50. THE RAM DOOR FULL OPEN LIGHTS REMAIN ILLUMINATED WHILE THE FLAPS AREEXTENDED.MENU PRINCIPAL
  51. 51. IN-FLIGHT, WHEN THE FLAPS ARE RETRACTED, THE AUTOMATIC TEMPERATURECONTROL TAKES OVER AND THE RAM-DOOR-FULL-OPEN LIGHTS EXTINGUISH. ATEMPERATURE SENSOR IN EACH PACK (pause2) CONTROLS AND MODULATES THERESPECTIVE RAM-AIR-INLET-DOOR AND EXHAUST LOUVERS TO MAINTAIN THEREQUIRED AMOUNT OF COOLING IN THE HEAT EXCHANGERS. (pause3) AT EXTREMELYHIGH AMBIENT TEMPERATURES, AUTOMATIC CONTROL MAY POSITION THE RESPECTIVERAM-AIR-INLET-DOOR AND EXHAUST LOUVERS FULL OPEN FOR ADEQUATE PACKCOOLING. THE RAM-DOOR-FULL-OPEN LIGHT ILLUMINATES TO SHOW THIS CONDITION.MENU PRINCIPAL
  52. 52. ANSWER B IS CORRECT.MENU PRINCIPAL
  53. 53. WHEN FLAPS ARE EXTENDED DURING DESCENT, THE RAM-AIR-INLET-DOORSAUTOMATICALLY DRIVE FULL OPEN. THIS ENSURES PROPER COOLING DURING FLIGHTAT SLOWER AIRSPEEDS. NOW, LETS LOOK AT NORMAL OPERATION OF THE AIRCONDITIONING SYSTEM.MENU PRINCIPAL
  54. 54. HERE ARE THE STEPS NECESSARY TO AIR CONDITION THE AIRPLANE ON THE GROUND,USING EITHER THE APU OR A PNEUMATIC GROUND CART.MENU PRINCIPAL
  55. 55. FIRST, POSITION THE TEMPERATURE INDICATOR SELECTOR TO SUPPLY DUCT. THISPERMITS THE CREW TO MONITOR THE TEMPERATURE OF THE AIR ENTERING THESUPPLY-DUCT. (pause3) NEXT, SET BOTH TEMPERATURE SELECTORS TO THE AUTO-NORMAL POSITION. THE TEMPERATURE CONTROLLERS WILL AUTOMATICALLYREGULATE THE AIR-MIX-VALVES WHEN THE PACKS ARE TURNED []ON.MENU PRINCIPAL
  56. 56. THEN, POSITION THE RIGHT PACK SWITCH TO []ON AND, AFTER A FEW SECONDS,OBSERVE THE DUCT PRESSURE DECREASE. POSITIONING THE PACK SWITCH []ONOPENS THE PACK VALVE ALLOWING AIR TO FLOW FROM THE PNEUMATIC MANIFOLDINTO THE AIR CONDITIONING SYSTEM. ON THE GROUND, WHEN OPERATING THE APU,ONLY ONE PACK IS NORMALLY USED.MENU PRINCIPAL
  57. 57. FINALLY, IF ADDITIONAL AIR IS REQUIRED AT THE GASPER OUTLETS, PLACE THE GASPERFAN SWITCH []ON.MENU PRINCIPAL
  58. 58. REVIEW THE PROCEDURES ASSOCIATED WITH THE USE OF THE APU OR PNEUMATICGROUND CART IN THE SUPPLEMENTARY PROCEDURES SECTION OF THE OPERATIONSMANUAL.MENU PRINCIPAL
  59. 59. B IS THE CORRECT ANSWER. TO OBTAIN SATISFACTORY HEATING FROM BOTH PACKS,THE APU MUST BE CAPABLE OF MAINTAINING BETWEEN 20 TO 25 PSI WITH BOTH PACKSWITCHES []ON. ANY PRESSURE BELOW THIS WILL VENTILATE THE AIRPLANE, BUT NOTCOOL IT.MENU PRINCIPAL
  60. 60. THIS COMPLETES THE NORMAL OPERATIONS SECTION OF AIR CONDITIONING. THE NEXTSECTION DEALS WITH PRESSURIZATION.MENU PRINCIPALRETURN TO MENU
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×