Engine Run Flashcards
What are the N1 limits at stabalized idle?
16-22%
What are the N2 limits at stabalized idle?
54-62%
What is the EGT limit at start?
725 C
When does the automatic starter cutout start?
43-45% N2
How long does the pneumatic starter’s automatic cutoff sequence take to complete?
3-9 seconds
When wet motoring, at what engine speed do you place the throttle to start?
15-20% N2
What are the chock requirements above ground idle?
6 chocks. 2 in front of front tires. 2 in front of aft tires. 2 aft of aft tires
What positions should the strobes be in for a non-fuel trasnfer engine run?
Upper on. Upper color A (Red)
Reserve brake pressure should read what during pre-check?
1,000 PSI at 70
What TO is used for engine cleanup after Halon is used?
1-1-691
What are the indications of an engine shutting down properly?
EGT reading decreases, N2 decreases to 0, Fuel flow to 0
What must you be aware of when operating an engine with the PMC off?
Not overshooting desired thrust setting
What must you check if nose doors are open prior to an engine run?
Ensure the actuator rods are disconnected
What CG indicators may not be used?
CDU’s or IFMP
What stage of low pressure turbine blade must you check the general condition of?
Stage 4
Why is it deseriable to minimize use of ignition systems during ground use?
Economic reasons
Inboard and outboard spoiler hydraulic pressure switches should be in what position during pre-start checks?
Cut-off with switch guards open
What two ways can you determine you have an internal engine fire?
Failure of EGT to decrease when throttles are in cutoff or ground crew observation
When should Halon be sprayed into an engine inlet?
When fire is restricted to that area and is of serious proportion
Bleed air crossover valve should be placed where prior to engine start?
Open (Cover closed)
What is the engine exhaust danger area at idle?
180 feet
During engine start, where should oil temp selector be placed?
M
What happens when you hit start on the APU while holding Gen Only? (4 things)
- Applicable doors open and door open lights come on
- Tachometer accelerates to 100% in approx 11 seconds
- Applicable ready light stays out
- Applicable EGT raises rapidly to 800F
Do not re-engage JFS above what speed?
5% N2
When oil temp switch is put to “T”, where should it settle?
175-195 degrees C
Ideally, when do you advance the throttle to start?
25% N2
When EWO start switch is pressed, what three things happen?
- EWO 1 & 2 lights come on
- RDY lights 1 & 2 come on
- 1 & 2 EGT raises rapidly to approx 1300 F
APU with PN 161331-135 will have enclosure doors installed in what two cases?
First run of a newly installed or newly reinstalled APU engine
How fast does combustion occur?
Within 10 seconds after throttle is moved to start (Usually within 2-3 seconds)
When an outboard engine is run above ground idle, the opposite engine must be ran to what setting?
Within 5% N1
What do you do for an engine flameout?
Place affected engine to cuttoff and all others to idle. Shut down engines and investigate cause. A restart may be attempted if indications prior to flameout did not reveal malfunction
What must you wait for before turning boost pump switches off?
N2 to read 0%
For normal operations, what is the minimum time that should be used to transition from idle to TRT?
2 seconds
Why must throttles be put in cutoff before T-handle is pulled?
To avoid damage to the fuel pump
When would you place the engine switch to ignition?
After 50% N2 when temp is below freezing
Where should the APU generator switch be prior to APU start?
Off position
At which temperatures must you perform a frozen door check on the APU?
40 degrees F
QSAS accumulator should read what?
3000 +/- 350 PSI
For what type of APU operation is a fireguard required?
When APU is operating with enclosure doors removed?
Define “hot start”
EGT exceeds maximum starting temps
Define “no start”
EGT does not rise
Can JFS be operated with fan cowls open?
No, damage to engine components could result
After ignition, fuel flow will increase to approx _____. When throttle is placed to idle, fuel flow should be _____?
1000 Pounds Per Hour. 400-800 PPH.
How long must you operate at idle before going to a higher thrust?
5 minutes
What happens if you depressurize hyraulics before N2 reads 0?
You could overfill the reservoir
During engine run, what position must the fan ducts be in?
Closed and latched
During an engine run defuel, where must the manuel refuel valve be?
Down in the flight position
When something is dropped in front of an engine, when must you shut it down?
Immediatly
Prior to engine start, what position is the engine bleed valve in?
Open
What position are the nav lights in during a fuel transfer engine run?
Bright and steady
What is the exhaust danger area at TRT?
900 feet
When do brake over-pressure relief valves release pressure and fluid?
3400 PSI
White strobe lights can cause eye damage up to what distance away?
500 feet
What is the minimum number of people to remove enclosure doors during APU operation?
2
If APU is unable to hit 25%, when can you start?
Maximum motoring speed (less than 1% increase in N2 in five seconds) and above 20% N2
Hold mode select to Gen Only when starting the APU until what RPM?
60% RPM
If starter control valve light stays on, when and what must you do?
If on for 10 seconds after 45% N2, place throttle to cutoff and engine bleed valve to close
At what RPM do you place the ignition switch to off?
50% N2
What is the duty cycle for JFS starting?
60 second max continous operation
What is the duty cycle for JFS motoring?
180-190 seconds before automatic shutdown. Allow 60 minute cooling
What are the EGT limits for normal takeoff power?
905 Celsius. Can only be above 870 Celsius for five minutes.
What are the N1 and N2 limits at normal takeoff power?
102% N1 and 105% N2
What is the maximum oil scav temp at normal takeoff power?
160 Celsius
During icing conditions prior to exceeding __ % N1, if engine has operated at idle for __ minutes, accelarte to __ % N1 to shed initial ice. Check for ____ ____ or ____ then accelerate slowly to __ % N1 and hold for __ seconds to shed the remainder of the ice.
70, 10, 35, unusual vibration or noise, 70, 15
What actions should you take for an unsatisfactory engine start to shut down that engine for a no start, hot start or sub idle stall?
Do not use engine fire switch. Place throttle to cut off. Continue to motor for 60 seconds. Move ignition/start switch to off. Turn fuel boost pumps off. Investigate reason. Clear fuel. If neccessary, dry motor. Another start may be attempted if temp limit was not exceeded.
If starting fuel flow exceeds ____ before light off, a hot start may result. Shut down immediately,
680 PPH
Prior to start, ensure PMC switches are in what position?
On, switch guards closed
What must be done on a newly installed engine or hydraulic pump?
System hydraulic pressure switch should remain off for 5 minutes at Idle to bleed air from hydraulic system.
What two things must be positioned where for APU start?
Ignition/start switch to off, throttles to cutoff
Ensure APU cooling air duct fire control valve is ____
Open
Normal fuel flow rate at stablized RPM should read what?
400-800 PPH
What can be indicated by one APU or ground cart failing to provide sufficient N2?
Bleed air duct failure or leak
What is the duty cycle for the pneumatic starter for motoring?
5 minutes maximum continuous operations. 10 minutes cooldown after first cycle, 30 minute cooldown on subsequent cycles
On comm 2, put selector switch to what position?
TR
How much must you reduce maximum wind limits in gust conditions?
5 knots
What PSI must you charge to for setting brakes?
3,100 PSI
What position for strobe lights during a fuel transfer engine run?
All off
How can you tell what position the APU cool air duct fire control valve is in?
If the red indicator mark is visible, the valve is closed.
Hydraulic quantity gauges should read what prior to engine start?
Left 3.75-4.25 gallons. Right 4-4.5 gallons
At what percent N1 does running an inboard engine require the opposite inboard engine to be ran within 5%?
40% N1
APUs are not to be restarted in EWO mode after APU operation for how long?
5-35 minutes unless actual EWO condition requires
Personnel aft of what station inside the airplane must wear hearing protection during APU operation?
900
What identifies a hung start?
An engine light off followed by rapid EGT rise, abnormally slow acceleration, and RPM stabilization below ground idle
What could cause a rapid EGT rise resulting in an overtemp due to excessive fuel in the combustion chamber?
A delayed light off
What position should the hydraulic pump supply switches be in?
Open with the guards closed
How long are you supposed to wait between extinguish switches?
30 seconds
When shutting down, if a steady decrease in EGT does not occur, be prepared to _____?
Motor engine with starter until evidence of burning has ceased
Engine inlet danger area at idle?
25 feet
During non-defuel engine run, where must the manuel refueling handle be?
Up in the refuel position
If throttle is retarded to cutoff, do not advance it until proper engine start sequence is re-iniated. Why?
Introducing unburned fuel into the engine may create a fire in the engine
If amgient temperature is colder than ___ and first start is unsuccessful, apply heat (___ max) to MEC for a minimum of ___ but prerably ___.
0 Celsius or 32 F, 65 C or 150 F, 10 minutes, 30 minutes
What is the aft CG limit for an engine run?
35%
What are the numbers for a cross check?
EGT less than 600 C at 40 N2
When an engine is ran with fan cowls open, what must you inspect for?
Fuel, oil, and hydraulic leaks
What oil indications are required prior to advancing throttle to start? Idle?
Start - Positive oil indication. Idle - Low oil pressure light out and at least 11 PSI indicated
What should the volts read?
27 +- 3 volts
Define sub-idle stall
N2 rollback. As N2 rolls back, EGT will rise. Fuel flow cannot be used as a stall indication.
What are the fuel requirements for an engine run?
15,000 pounds for ground idle. 40,000 pounds for 75% N2. 60,000 pounds for TRT
If air temp is constantly below -40, use which engine oil?
MIL-PRF-23699
Can both fan cowls and fan ducts be in the held open position during wet and dry motoring?
Yes
Can engine cowling be opened or closed during engine run?
No, they must stay in the position they were in prior to starting
What two IDG lights can come on to indicate an engine shut down is required?
IDG failure. IDG DISC
Pneumatic starter initiates automatic cutout when? JFS?
43-45% N2. 50-53% N2
N1 RPM should be indicated by when?
25% N2
When starting, a rise in EGT should occur within how long?
10 seconds
Prior to start, place left Alternate Pressure switch to ____ and right Alternate Pressure switch to ____.
Off and decrease (Switch guards closed)
Left and right accumulator pressure should read what during your precheck?
2,000 PSI at 70F
When do you advance from start to idle?
50% N2
If ambient temp is below ___, do not close the ____ until the engine has been ran for ___ to allow ____ oil temp to come up
40F, Gen breaker switch, 5, IDG
Where must the throttle lever be prior to fuel boost pumps being turned on?
Cutoff
If starter control valve fails to close (indicated by starter valve light not going out), what should you do?
Throttle to cutoff, engine bleed switch to close
Nav lights should be positioned where during a non-transfer engine run?
Bright and flash
Only for ground starts: Do not re-engage pneumatic starter above _____. Reengagement above this speed could result in _____ ______.
25% N2, starter damage
When can you run more than one engine above idle at one time?
When tech data requires
Describe engine anti-ice procedures
Operate for 5 minutes if temp is 0-32 F with 50% or more humidity. Operate for 10 minutes if temp is below 0F. Place Engine Anti-Ice switch off before starting engines
What light comes on momentarily when battery power goes from off to emergency?
EGT lights
Advance throttles to start at 25% N2. Monitor for these two things.
Fuel flow 300-680 PPH. EGT indication within 10 seconds
Name eight indications that should be present at stabilized idle?
N1 - 16-22% N2 - 54-62% EGT is not over 725C Oil pressure is 13-35 PSI HYD pump inop light is out Engine low oil pressure light is out Oil temp is less than 160C Fuel flow is 400-800 PPH
What should hydraulic pressure gauges read AFTER engine start?
2,850 - 3,200 PSI
How can you recognize an engine flameout?
Immediate decrease in EGT, N2, fuel flow, and oil pressure. N1 RPM drops closely after
What happens when you upgrade from Gen only on the APU by hitting the start switch for a second time?
Applicable RDY light comes on. Applicable EGT rises rapidly to approx 1200 F
When wet motoring, within ___ of fuel flow indication of ___ PPH or fuel spray appears outside engine exhaust section, place throttle to ____ and continue to motor for ____ to clear fuel from combustion section.
15 seconds, 330, cutoff, 60 seconds
What should the surge damper pressure be at 60F?
1,500 +- 50 PSI
If failed start attempt, shut down JFS. After maximum delay of ____, motor for ____. Delay _____ before second start attempt
120 seconds, 90 seconds, 5 minutes
Define false start
EGT rises with no increase in RPM
On Comm 1, place selector to what position?
Main
Frequency meter should read?
395-405 cycles
Ensure flame arrestor plug is _____
Installed
What condition must be met for enclosure doors to be able to be removed?
APU has reached 100% RPM in Gen Only mode
What is the intake danger area at TRT?
50 feet
What is the fuel requirement for APU operation?
2,000 pounds in #2 main tank
At what speeds may engine cowls be in the open position?
Ground and flight idle
When can tailwind component limits be exceeded?
Power settings up to 70% N1
What is the duty cycle for the pneumatic starter for starting?
90 seconds maximum continuous operation. Maximum of 3 90 second cycles. 60 second cooldown after cycles 1 and 2. 10 minute cooldown after third cycle. (90, 60, 90, 60, 90 10)
When wet motoring, place ignition switch to off and start light goes out within ____
10 seconds
