0 1 L syste{ll) ENGINE STARTING PROCEDURES START PANEL. 443d TECHNICAL TRAINING SQUADRON MILITARY AIRLIFT WING, ING (MAC)

Transcription

1 'STARTl tjcn IGtJ ttio N 0 1 L syste{ll) ENGINE STARTING PROCEDURES START PANEL ~. ' ~ 12 fu d TECHNICAL TRAINING SQUADRON MILITARY AIRLIFT WING, ING (MAC) ALTUS AIR FORCE BASE,OKLAHOMA

2 1. -, FOR TRAINING PURPOSES ON LY NOT NECESSARILY CURRENT AFTER DISTRIBUTION

3 ENGINE STARTING PROCEDURES STATEMENT OF LEARNING OBJECTIVES When this program is completed, the student should be able to do the following: List the indications that should be received by the pilot when the Starter Button is depressed State Nz RPM for Fuel and Start Ignition switch actuation. 3. State the time limit for oil pressure and Ni indication. 4. State the time limit for light-off indication on ground starts. 5. List the necessary action to take when the STARTER VALVE OPEN light remains ON after starter button pops out. 6. State the time limit necessary for engine clearing. 7. State the time limit for light-off indications on an air start Air force OC, 14 Jul 69-2fi;t

4 Page 1 ENGINE STARTING PROCEDURES 'Ibis program will give you a general outline of the engine starting procedures, limits, etc., that you must observe while maki~g an engine start. It does not cover every item on the check list and is in NO manner, shape, or form designed to replace the check list as laid out in T.O. 1C-141A-l. The normal start~ng sequence is 1, 2, 3, 4. 1b~will be posted in front of the nose of the aircraft. Please TURN to Page 3.

5 Page 2 ENVIRONMENTAL CONTROL PANEL

6 Page 3 Prior to engine start, check the following items on the Flight Engineer's Envi ronmenta l Control Panel: The AIR CONDITIONI NG MASTER switch s hould be in ENG START. The ENG START position shuts off all units using bleed air so all the available bleed air can support the engine start. After the AIR COND MASTER swi tch i s positioned, check the MANIFOLD BLEED PRESSURE for desired pressure range. 5'2 Fill in the blank spaces below: The AIR COND MASTER switch should be placed to the ~NG position and the Manifold Bleed Pressure should be in a pr essure r ange Of.3,;;_0 t o 5_ 2. PSI. Check your answers on the illustrations above. Please TURN to t he next page.

7 Page 4 While you're still on the Flight Engineer's Environmental Control Panel, check the Engine Bleed Valve switches to make sure they are in the OPEN position. The pilot should set the throttles to Idle-Start. IDLE -START The Engine Bleed Valves switches should be OPEN to allow air to the engine starter and the Throttles s hould be set t o the IDLE - S1-AR\ position. Check your answers on the illustration above. Pl ease GO to the next page.

8 The only thing we have to do t o get the show on the road i s to push the STARTER BUTTON. Page 5 To initiate a start, depress the Starter Button. Please TURN to Page 7.

9 Page 6 START PAN.El CENTER INSTRUMENT PANEL ANNUNCIATORS

10 Page 7 Holding the Starter Button depressed momentari l y will activate a HOLDING COIL which automaticazzy HOLDS the Starter Butt on in. When the Starter Button is depressed the first indications are: (E) A RED light in the Starter Button J STARTER VALVE OPEN light N 2 rotation Please TURN to Page 9.

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12 Page 9 Try the following questions: A. The Air Cond Master switch should be in the position. B. The Manifold Bleed Pressure should be in a range of PS I. to C. The Engine Bleed Valves switches should be to allow air to the engine starter and the Throttles should be at the position. D. Some of the inunediate indications of an engine start are: A red light in the ' the OPEN light illuminates and rotation will be noted. Let's check and see if we have the correct answers. A. ~START B. 1Q. to _g C. OPEN IDLE START D. Starter Button STARTER VALVE Please TURN to the next page.

13 Page 10 Now there is a TIME LIMIT that must be observed after depressing t he Starter Button. l Within 20 SECONDS aft er the i nitiation of L_ ~d i cation of N 1 ROTATION and~ IL PRESSURE. the start, there must be an \ I 60 '40.(.' IL Hl\~ r ~o--: ov 1~ SECONDS N 1 ROTATION and OIL PRESSURE ~ Meanwhile N 2 RPM is conti nuing to increase and you must take some action. When Nz RPM reaches 15%, " position" the Fuel and Start Ignit i on switch to RUN. At 15 %.. position to STOP RUN AIR START Fuel and Start Ignition Switch et\ Please GO to the next page.

14 Page 11 Imagine yourself in the cockpit of the C-141 starting the engines. You have pushed the Starter Button and now you are watahing for N 1 rotation and. an indication of oil pressure. You know you must have these indications within seconds or you discontinue the start N 2 RPM will be increasing and when it reaches the Fuel and Start Ignition switch must be placed ~Q.the 3 RPM you know position. Remember --- you must have an indication of Ni Rotation and Oil Pressure within a 20 SECOND time limit, and when Nz reaches ~RPM you place the Fuel and Start Ignition switch to!!lli What indications will you see next? For the answers, please TURN to the next page.

15 Page 12 When be noted the Fuel and Start l!o'!ition switch is placed to RUN~uel FIRST and the~gt will be noted. Flow will First FUEL FLOW. Then EGT ~ However within 20 SECONDS from the i :witch is p:sitioned to RUN, there must time the Fuel and Start Ignition be an EGT indication. Within 0 STOP RUN AIR START SECONDS There must be an indication of EGT If not... STOP ~ RUN ~ AIR START Please GO to the next page.

16 Page 13 Assuming the Engine Start is normal, as the engine accelerates the Starter Button should "POP OU"t" by the time N2 reaches 453. If NOT pull it OUT LOOK Jllor Up to this point, we know that some TIME LIMITS must be observed during the Engine Start Cycle. The first Time Limit began when the Starter Button was pushed and we were looking for Ni rotation and engine oil pressure.to occur within 20 seconds. The next Time Limit s t arted when the Fue l and Start Ignition switch was placed to the RUN position. There had to be an indication of EGT within seconds. We also know that if the Starter Button did NOT "pop out" by the time N2 reached 3, i t should be manually pulled out. Please TURN to the next page.

17 Page 14 Answers: 20 seconds, 453. Regardless of how the St arter Button is disengaged, either automa tically between RPM Nz or manually pull ed at 453 RPM N 2, the STARTER VALVE OPEN light should ext i nguish. ~ If the I NO I STARTER light r emains :::.::n::i::i::: :g: ::osltlon AIR START ::p ~ =~:ip~::c~e Flight ~ Another Time Limit to observe is 2 MINUTES for the engine to reach ~Id le RPM ( N 2 ) after an indication of EGT. If not... STOP ~ lllutes 10 RUN ~ AIR START Please GO to the next page.

18 When the Starter Button is disengaged, the STARTER VALVE OPEN light should f XTcl\l()lJ\$\=\ Page 15 If a malfunction should occur, the Fuel and Start Ignition Switch should be placed to the $"\ e> f position. After there is an indication of EGT, the engine must accelerate to Idle RPM within 2... \i\\n\ffes minutes. If NOT, SHUT the engine down. Please GO to the next page.

19 Page 16 Answers: extinguish, STOP, 2 minutes. The maximum allowable EGT during the start cycle is 455 c. If i t was necessary to discontinue a START and another START is to be attempted, the engine should be cleared of fuel, etc. The first step is to place the throttles to the IDLE START position and check to be sure the Fuel and Start Ignition Switch is in the STOP position. IDLE START S TOP.~ RUN ~ AIR START Please TURN to the next page. Note If the start is discontinued before starter button popout, the starter may be left ~ngaged to clear the engine. If the start is discontinued after starter button popout, allow the engine to stop rotating before engaging the starter to clear the engine.

20 Page 17 The next step is to depress the Starter Button and allow the starter to rotate the engine for 10 to 15 SECONDS, 0 then pull the button. SECONDS Do not exceed the starter duty cycle of 1 minute ON, 30 seconds OFF, 1 minute ON, 30 seconds OFF, 1 minute ON, 30 minutesoff. The starter may be operated for 1. 5 minut~s ON, 5 minutes OFF for any number of duty cycles. OK, now you're ready to try again. Fill in the blank spaces. The engine should be a3tored for )0 to \5 seconds to clear out any raw fuel. Check your answer in the illustration above. Please TURN to Page 18.

21 Page 18 Now let ' s take a quick look at the simple operation of making an AIR START. We wil l deal strictly wi th the procedures of manipulating switches, etc. (I) The first step is to turn the continuous ignition switch OFF. ~ Set the THROTTLE to IDLE-START. Please GO to the next page.

22 Page 19 Make certain the Engine Fire Emergency Control (T) handle is IN. ~ A Main Boost Pump is ON. The air speed should be within range as shown by a chart in the -1, if so place the Fuel and Start Ignition switch to the AIR START position. ~ STOP AIR START Remember it must be hezd in the ~ ~ position since it is spring loaded to the RUN position. Please TURN to the next page.

23 Page 20 There is a time limit you must observe. When the Fuel and Start Ignition switch is placed to the AIR START position STOP AIR START an indication of EGT must occur within 30 SECONDS. 30 SECONDS If there is NO indication of EGT within 30 seconds, DISCONTINUE start by placing the Fuel and Start Ignition switch to STOP. Please GO to the next page.

24 Page 21 Try these questions. A ground start attempt has failed and another start is to be attempted, the engine must be cleared of all raw fuel. let the starter rotate the engine To clear the engine you would to seconds. On an air start, EGT must occur within ~ seconds after the Fuel and Start Ignition switch is placed to AIR START. Please TURN to the next page. -. (

25 Page 22 Answers: 10 to 15 seconds, 30 seconds. This completes the Engine Starting and Ignition Systems and procedures. Although Engine No. 1 was used as an example, all the other engines are started using the same procedures. If you have any further questions, your instructor will be more than happy to answer them. If you would like to review any part of the procedures the subjects start on the following pages: SUBJECT PAGE 1. Air Conditioning Master Switch 3 2. Manifold Bleed Pressure 3 3. Engine Bleed Valve Switches 4 4. Throttle Position 4 5. Indications when the Starter Button is depressed 7 6. Time Limits 10 & Starter Button disengagement Malfunction of starter valve Clear engine procedures 16 & Air Starts ~I ' l t'