Engines, APU Flashcards
Explain what is indicated by a REV indication above the N1 indicator
REV (amber) - Thrust reverser moved from stowed position
REV (green) - Thrust reverser is deployed
VOL 2 / 7.1.1.31
Describe the Engine Abnormal Start Procedure (ground starts only)
During ground starts, the EEC monitors engine parameters to detect impending hot starts, engine stalls, EGT start limit exceedances, and wet starts. These protection features do not function during inflight starts.
- If an impending hot start is detected by a rapid rise in EGT or EGT approaching the start limit, or a compressor stall occurs, the white box surrounding the EGT digital readout flashes white. The EEC software automatically turns off the ignition and shuts off the fuel to the engine for an impending hot start or stall.
- If the EGT exceeds the starting limit, the EGT display, both box and dial, turn red. The EEC automatically turns off the ignition and shuts off the fuel to the engine.
- A wet start occurs if the EGT does not rise after the start lever is moved to IDLE. If a wet start is detected, the EEC turns off the ignition and shuts off the fuel to the engine 15 seconds after the start lever is moved to IDLE.
VOL 2 / 7.3.7.1
Explain what is indicated by an amber REVERSER light on the aft overhead panel
the REVERSER light, located on the aft overhead panel, illuminates when the thrust reverser is commanded to stow and extinguishes 10 seconds later when the isolation valve closes. Any time the REVERSER light illuminates for more than approximately 12 seconds, a malfunction has occurred and the MASTER CAUTION and ENG system annunciator lights illuminate
VOL 2 / 7.3.8
Explain the meaning of the amber APU LOW OIL PRESSURE light
Oil pressure is low causing an automatic shutdown (after start cycle is complete)
VOL 2 / 7.2.6
Explain the meaning of the blue APU MAINT (Maintenance) light
APU Maintenance problems exist
Note: Call maintenance
VOL 2 / 7.2.6
Explain the meaning of the amber APU FAULT light
A malfunction exists causing the APU to initiate an automatic shutdown
VOL 2 / 7.2.6
Explain the meaning of the amber APU OVERSPEED light
- APU RPM limit has been exceeded resulting in an automatic shutdown
- Overspeed shutdown protection feature has failed a self-test during normal APU shutdown
VOL 2 / 7.2.6
Recall the function of the Electronic Engine Control (EEC) Switches
ON (in view, white): indicates normal control mode is selected
ALTN (illuminated amber): EEC has automatically switched to alternate mode control mode or it has been selected manually
Note: Both ON ALTN may be in view if EEC has automatically switched to soft alternate mode. EGT limits must be observed in all control modes
VOL 2 / 7.2.3
Explain the meaning and location of an amber ENG FAIL alert
- Displayed on the EGT indicator
- Engine operating below sustainable idle (less than 50% N2) AND engine start lever in IDLE position
VOL 2 / 7.1.1.6
Explain the meaning of a framed red box around the N1, N2 or EGT indicators
On ground, after both engines shutdown, red box indicates an exceedance has occurred.
VOL 2 / 7.1.1.2 & 7.1.2.1 & 7.1.1.5
Describe when the engine start lever should be placed to IDLE during a NORMAL engine start
Position engine start lever to IDLE detent when N2 RPM reaches maximum motoring and N1 rotation is observed
Note: Maximum motoring occurs when N2 acceleration is less than 1% in approximately 5 seconds
Whaaaat? Not 25% N2?
VOL 1 / 3.4.8
Recall when the ENGINE START switch automatically moves from GRD to OFF during an engine start
Automatically at 56% N2 RPM; if not, position start switch to OFF
VOL 1 / 3.4.8
Recall the conditions that will cause the APU to auto shutdown
Memory Aid:
FLOF
- F: Fire
- L: Low oil pressure
- O: Overspeed
- F: Fault
VOL 2 / 7.2.6
Recall when the APU is ready to accept a bleed air or electrical load
- The Blue APU GEN OFF BUS light illuminates when the APU is ready to accept a bleed air or electrical load
- Electrical power may be used immediately
- A 2 minute stabilization is recommended to extend the service life of the APU before using bleed air. Operate the APU for two full minutes after illumination of the APU GEN OFF BUS light before using it as a bleed air source
VOL 2 / 7.4.2.4
Describe the function of the N1 SET Knobs
N1 SET Outer knob:
AUTO:
- both reference N1 bugs set by FMC, based on N1 limit page and takeoff reference page
- displays reference N1 bugs at active N1 limit for A/T
BOTH:
- both reference N1 bugs and readouts manually set by turning the SET inner knob
- has no effect on A/T operation
1 or 2:
- resepective N1 reference bug and readout manually set by turning N1 SET inner knob
- has no effect on A/T operation
N1 SET Inner Knob (spring loaded to center) Rotate:
- positions reference N1 bug(s) and readouts when N1 SET outer knob is set to BOTH, 1 or 2
Note: whatever the f that means
VOL 2 / 7.1.1.2
An illuminated EEC ALTN light indicates that EEC:
has automatically or manually switched to the alternate control mode
ESV-SA: Engines, APU
An illuminated APU LOW OIL PRESSURE light indicates that…
the APU oil pressure is low causing an automatic shutdown
ESV-SA: Engines, APU
During engine start, when should the engine start lever be moved to the idle position?
At maximum motoring N2 (with N1 rotation)
ESV-SA: Engines, APU
If the APU OVERSPEED light illuminates, what happens to the APU?
Auto shutdown
What is indicates by an amber REVERSER light on the overhead panel?
The thrust reverser is commanded to stow
ESV-SA: Engines, APU
During ground starts, the EEC monitors engine parameters to detect impending:
Select all that apply
- EGT start limit exceedances
- hot starts
- wet starts
ESV-SA: Engines, APU
Which statement is true concerning the function of the outer N1 SET knobs?
Select all that apply
AUTO - both reference N1 bugs set by FMC
BOTH - both reference N1 bugs and readouts manually set
1 or 2 - respective N1 reference bug and readout manually set
ESV-SA: Engines, APU
What is the meaning of the ENG FAIL alert on the upper display unit?
The engine operating below sustainable idle (less than 50% N2)
with start lever in IDLE
ESV-SA: Engines, APU
The ENGINE START switch should automatically move to OFF during an engine start at ____%N2
56% N2
ESV-SA: Engines, APU
The APU MAINT light indicates a APU maintenance problem exists
TRUE
ESV-SA: Engines, APU
A red box found on the N1, N2 or EGT indicator after engine shutdown would indicate which of the following?
An exceedance has occurred
ESV-SA: Engines, APU
If a reverser if moved from the stowed position, how is it indicated?
Amber REV above the N1 indicator on the upper display unit
- it’s NOT white
- it’s NOT red
- it’s NOT above the EGT indicator
ESV-SA: Engines, APU
An illuminated APU LOW OIL PRESSURE light indicates that…
the APU oil pressure is low causing and automatic shutdown
ESV-SA: Engines, APU
If an APU FAULT light illuminating, which of the following statements are correct?
- An automatic shutdown will occur
- A malfunction exists
ESV-SA: Engines, APU
If an APU OVERSPEED light illuminating, which of the following statements are correct?
- The overspeed shutdown protection feature has failed a self-test during normal APU shutdown
- The APU RPM limit has been exceeded resulting in automatic shutdown
ESV-SA: Engines, APU
To use the APU as a bleed source, what is the recommended APU warm-up time after start?
2 minutes
NOT 120 seconds - on the Check your knowledge CBTs, it said to wait 1 minute for APU warm up before using as a bleed source - annoying.
ESV-SA: Engines, APU
Per the APU Check Your Knowledge CBT - What is the recommended APU warm up time after start prior to using the APU as a bleed source?
It should be 2 minutes but it says “one minute” is correct
NOT 120 seconds - on the Check your knowledge CBTs, it said to wait 1 minute for APU warm up before using as a bleed source - annoying.
A red box found on the N1 indicator after engine shutdown would indicate which of the following?
N1 exceedance has occurred
Check your knowledge CBTs
