APU MENU Normal operation 1/38 APU MENU Normal operation 2/38 During the exterior inspection, check that the APU compartment access door is closed and verify the condition of the APU air intake. APU MENU Normal operation 3/38 You also have to check that the APU exhaust is clear, and verify that the APU fire extinguisher overpressure red disc is in place. For more details on this red disc, refer to the FIRE chapter. APU MENU Normal operation 4/38 First, select the APU MASTER switch to switch it ON. You are in the initial cockpit preparation phase. In this example, external power is connected. Let’s start the APU. APU MENU Normal operation 5/38 Noo.. Prreessss oonn tthhee APUMASTTER sswiittcchh.. You are in the initial cockpit preparation phase. In this example, external power is connected. Let’s start the APU. APU MENU Normal operation 6/38 Noo.. Prreessss oonn tthhee APUMASTTER sswiittcchh.. You are in the initial cockpit preparation phase. In this example, external power is connected. Let’s start the APU. APU MENU Normal operation 7/38 APU MENU Normal operation 8/38 APU MENU Normal operation 9/38 Observe that : • the ON light illuminates, • the ECAM APU page is automatically displayed, • and the green FLAP OPEN indication appears when the APU air inlet flap is fully open. APU MENU Normal operation 10/38 Select the APU START pb sw to switch it ON to initiate the automatic start sequence. The APU can now be started using the START pb sw. Note : you do not have to wait for the FLAP OPEN indication prior to pressing the START pb sw. However, the APU will not start until the flap is fully open. APU MENU Normal operation 11/38 Noo.. Prreessss tthhee APU STTARTT ppbb ssw.. The APU can now be started using the START pb sw. Note : you do not have to wait for the FLAP OPEN indication prior to pressing the START pb sw. However, the APU will not start until the flap is fully open. APU MENU Normal operation 12/38 The APU can now be started using the START pb sw. Note : you do not have to wait for the FLAP OPEN indication prior to pressing the START pb sw. However, the APU will not start until the flap is fully open. Noo.. Prreessss tthhee APU STTARTT ppbb ssw.. APU MENU Normal operation 13/38 The ON light illuminates blue in the START pb sw, to indicate that the automatic start sequence has begun. Click on the forward arrow and observe the APU N speed and EGT parameters. APU MENU Normal operation 14/38 At approximately 95% N speed, • the ON light on the START pb sw extinguishes, • and the AVAIL light illuminates green, meaning that the APU parameters are normal and the APU is available to supply electrical power and bleed air. APU MENU Normal operation 15/38 APU MENU Normal operation 16/38 At the same time, • the AVAIL indication appears in green on the ECAM APU page, • and the APU AVAIL memo is displayed on the E/WD. APU MENU Normal operation 17/38 About 10 seconds later, the ECAM APU page is replaced by the ECAM DOOR page. APU MENU Normal operation 18/38 In order for the APU to provide bleed air, select the APU BLEED pb sw to switch it ON and observe the corresponding indications on the ECAM. For training purposes, we have recalled the ECAM APU page and displayed the AIR COND panel for you. APU MENU Normal operation 19/38 Noo.. Prreessss tthhee APU BLLEED ppbb ssw.. For training purposes, we have recalled the ECAM APU page and displayed the AIR COND panel for you. APU MENU Normal operation 20/38 For training purposes, we have recalled the ECAM APU page and displayed the AIR COND panel for you. Noo.. Prreessss tthhee APU BLLEED ppbb ssw.. APU MENU Normal operation 21/38 - The blue ON light appears in the APU BLEED pb sw, - the APU bleed valve opens with bleed air pressure available, - and the green APU BLEED memo replaces the APU AVAIL memo on the E/WD. APU MENU Normal operation 22/38 The engines are now running. Because the APU is no longer required, you are going to switch it off. FFiirrsstt,, sswiittcchh ooffff tthhee APU bblleeeedd.. APU MENU Normal operation 23/38 The engines are now running. Because the APU is no longer required, you are going to switch it off. Noo.. Prreessss tthhee APU BLLEED ppbb ssw.. APU MENU Normal operation 24/38 The engines are now running. Because the APU is no longer required, you are going to switch it off. Noo.. Prreessss tthhee APU BLLEED ppbb ssw.. APU MENU Normal operation 25/38 APU MENU Normal operation 26/38 Observe that : • the APU BLEED memo has disappeared on the E/WD and is replaced by the APU AVAIL memo, • and the APU bleed valve closes with the corresponding ECAM indications when the valve is fully closed. APU MENU Normal operation 27/38 TThheenn sseelleecctt tthhee APU MASTTER sswiittcchh ttoo sswiittcchh iitt ooffff.. APU MENU Normal operation 28/38 Noo.. Prreessss tthhee APUMASTTER sswiittcchh.. APU MENU Normal operation 29/38 Noo.. Prreessss tthhee APUMASTTER sswiittcchh.. APU MENU Normal operation 30/38 The shutdown is initiated. Notice that the blue ON light in the MASTER SW pb extinguishes. However, as the APU bleed has been used, the AVAIL indications remain on while the APU runs for approximately 2 minutes to cool down. Note : If the APU bleed has not been used, the APU shuts down immediately without any cool down period. APU MENU Normal operation 31/38 During the cool down period , you can stop the shutdown process by pressing the MASTER SW pb back to ON provided AVAIL is displayed. APU MENU Normal operation 32/38 When the cool down period is complete, the APU shuts down and AVAIL disappears. Click on the arrow to continue the shutdown sequence. APU MENU Normal operation 33/38 The air inlet flap has closed and the FLAP OPEN indication has disappeared on the ECAM APU page. The shutdown is now complete. Let’s now finish this module by presenting some APU limitations. APU MENU Normal operation 34/38 The use of the APU for bleed air is limited to 15 000 Ft maximum ( for 2 air conditioning packs operation ). APU BLEED AIR WITH 2 PACKS OPERATING APU BLEED AIR WITH 2 PACKS OPERATING AALLTTIITTUUDDEE((FFtt)) 2200000000 3399000000 1155000000 2255000000 APU MENU Normal operation 35/38 The use of the APU for bleed air is limited to 20 000 Ft maximum ( for 1 air conditioning pack operation ). APU BLEED AIR WITH 1 PACK OPERATING APU BLEED AIR WITH 1 PACK OPERATING AALLTTIITTUUDDEE((FFtt)) 2200000000 3399000000 1155000000 2255000000 APU BLEED AIR WITH 2 PACKS OPERATING APU BLEED AIR WITH 2 PACKS OPERATING APU MENU Normal operation 36/38 AALLTTIITTUUDDEE((FFtt)) 2200000000 3399000000 1155000000 2255000000 APU BATTERY RESTART LIMIT APU BATTERY RESTART LIMIT APU BLEED AIR WITH 1 PACK OPERATING APU BLEED AIR WITH 1 PACK OPERATING APU BLEED AIR WITH 2 PACKS OPERATING APU BLEED AIR WITH 2 PACKS OPERATING The APU can be started using batteries up to 25 000 Ft. APU MENU Normal operation 37/38 AALLTTIITTUUDDEE((FFtt)) 2200000000 3399000000 1155000000 2255000000 APU BLEED AIR WITH 1 PACK OPERATING APU BLEED AIR WITH 1 PACK OPERATING APU BLEED AIR WITH 2 PACKS OPERATING APU BLEED AIR WITH 2 PACKS OPERATING You can start the APU all the way to the max ceiling of the aircraft (39 000 Ft). APU OPERATION AND RESTART LIMIT APU OPERATION AND RESTART LIMIT APU BATTERY RESTART LIMIT APU BATTERY RESTART LIMIT APU MENU Normal operation 38/38 AALLTTIITTUUDDEE((FFtt)) 2200000000 3399000000 1155000000 2255000000 APU BATTERY RESTART LIMIT APU BATTERY RESTART LIMIT APU BLEED AIR WITH 1 PACK OPERATING APU BLEED AIR WITH 1 PACK OPERATING APU BLEED AIR WITH 2 PACKS OPERATING APU BLEED AIR WITH 2 PACKS OPERATING APU ELEC POWER APU ELEC POWER Module completed Electrical power from the APU can be used all the way to the max ceiling of the aircraft (39 000 Ft). NEXT APU OPERATION AND RESTART LIMIT APU OPERATION AND RESTART LIMIT APU MENU Normal operation 39/38 LLIISSTTOOFFSSUUBBJJEECCTTSS EXIT AUDIO GLOSSARY FCOM RETURN AAPPUUSSTTAARRTT AAPPUUSSHHUUTTDDOOWWNN WWAALLKKAARROOUUNNDD AAPPUULLIIMMIITTAATTIIOONNSS作者: guanshyy 时间: 2011-3-30 11:37:09