Engines / APU Flashcards
ENG_001
(88) Descibe the indications that fuel heat is on:
• The blue L/R FUEL HEAT ON annunciator light(s) on OAP will illuminate. Fuel and oil temp. indications should also rise.
ENG_002
Explain what is indicated by the amber REVERSE UNLOCK light and the blue REVERSE THRUST light:
- L/R REVERSE THRUST Light (blue) - Illuminates when thrust reverser is fully extended.
- L/R REVERSE UNLOCK Light (amber) - Illuminates when thrust reverser is unlocked.
ENG_003
Understand the meaning of “ENG SYNC ON” OAP message:
Illuminates when LANDING GEAR handle is in the DOWN position and ENG SYNC selector is in N1 (88 and 90) or N2 (88 only) position.
(88, 90) MD-88 engine warm up procedure during cold weather operations.
MD-88
For 1st flight of the day w/ OAT ≤ -6°C (20°F):
- Start both engines to allow for full 5’ warm-up.
- Engine anti-ice on (regardless of environmental conditions).
- After warm-up is complete, advance both throttles to 1.2 EPR and check for normal EPR increase.
- If EPR indications are not approximately equal for both engines, allow engines to warm up for additional 2’
- Advance throttles again to check for normal EPR increase, and if still abnormal, contact MCC. Note: Failure to comply with above procedure may result in erroneous EPR indications on takeoff roll. If OAT ≤ -35°C (-30°F):
- Operate engine(s) at idle for 2’ before advancing throttle.
ENG_016
(90) Understand what conditions will cause an AUTO ABORT during automatic start on the MD-90:
- Normal mode performs AUTO ABORT for hot start, hung start, locked N1 rotor, ignition failure, electronic control lost, engine stall and EGT failure.
- Once N2 reaches 50%, the AUTO ABORT feature is inhibited.
NOTE: No AUTO ABORT is available for low oil pressure or high vibration.
ENG_009
Recall the required engine warm up period prior to T/O power application:
Start second engine in sufficient time (5 minutes minimum if possible if engine has been shut down more than 2 hours) to achieve 2 minutes at idle prior to takeoff.
ENG_010
Recall the required engine cool down time prior to engine shutdown:
Engines require a three minute cool down prior to shutdown.
ENG_005
Recall the function of the fuel heat switch:
- OFF - Removes power from fuel heat circuit following completion of fuel heat cycle.
- ON - (Momentary) Timer is energized for one minute. Respective fuel heat valve opens, supplying high stage bleed air to the air/fuel heat exchanger.
- Fuel heat is not installed on the MD-90.
ENG_006
(90) Understand what automatically occurs with APU pneumatics when a L/R TAIL TEMP HIGH light illuminates:
• APU pneumatic duct depressurizes automatically on L/R TAIL TEMP HIGH light
ENG_007
(90) Understand the engine vibration display:
Engine vibration displays show vibration level from 0 to 9.9 (normal range is approximately 0.0 to 4.0).
ENG_008
Identify the conditions that would lead to MANUAL ABORTED START (assumes a manual start on the MD-90) for both MD-88/90?
MD-88/MD-90:
- No N2 rotation
- No oil pressure prior to 20% N2
- Rapid EGT rise toward limit.
MD-88 only:
- No N1 rotation prior to 20% N2
- No fuel flow or EGT rise within 20 seconds after placing fuel lever ON.
- Hung start (N2 fails to increase above 42%).
- Fuel flow digits are flashing combined with one or move of the abormal engine indications listed above.
MD-90 only:
- No N1 rotation prior to 32% N2.
- No EGT rise within 20 seconds after fuel flow.
- Engine vibrations above 4.0.
ENG_004
Recall the required engine warm up procedure during cold weather operations.
MD-88 - for first flight of the day with OAT at or below -6C (20F):
- Start both engines to allow for full 5 minute warm-up.
- Engine anti-ice on (regardless of environmental conditions).
- After warm-up is complete, advance both throttles to 1.2 EPR and check for normal EPR increase.
- If EPR indications are not approximately equal for both engines, allow engines to warm up for 2 additional minutes.
- Advance throttles again to check for normal EPR increase, and if still abnormal, contact MCC.
Note: Failure to comply with the above procedure may result in erroneous EPR indications on takeoff roll.
If OAT is -35C (-30) or colder;
- Operate the engine(s) at idle for two minutes before advancing throttle.
MD-90
- Minimum oil temp before advancing throttle above idle is -10°C.
- Oil temp. must reach 50°C before takeoff.
NOTE (MD-90): Oil temp readout will momentarily flash when engine oil temperature < -10°C and throttle is moved above idle.
ENG_011
Recall max APU start and operating altitude: MD-88 / 90
MD-88
- Max altitude for electric start: FL 370
- Max altitude for windmill start: FL 300
- Max operating altitude is FL 370
MD-90
- Max altitude for electric start: FL 350 (All APU starts are electric)
ENG_012
Describe when FUEL control lever / FUEL switch should be placed to ON during an engine start:
MD-88
- Put FUEL lever ON at max motoring rpm (usually 22-24% N2) with EGT below 100°C. Minimum N2 for FUEL lever ON is 20%.
MD-90
- Put FUEL switch ON at max motoring RPM (usually 25-26% N2) with EGT below 250. • Min N2 for FUEL switch ON is 15%. Fuel flow will not begin until 30 sec. after start valve has opened.
ENG_013
Recall max altitude to use APU electrics:
- MD-88: FL 370
- MD-90: FL 370
ENG_014
Recall max altitude to use APU Pneumatics:
MD-88
- In flight, APU is used for electrical power only.
MD-90
- Can supply pneumatics up to 20,000 feet.
ENG_015
Recall the minimum oil quantities for dispatch at maintenance and non-maintenance stations:
MD-88
- At a non-maintenance station: 8 qts.
- At a maintenance station: 12 qts.
MD-90
- At a non-maintenance station: 12 quarts.
- At a maintenance station: 16 quarts.
- After engine start: 8 quarts.
ENG_017
(88) Describe the function of the MAN EPR SET Knobs:
- Pull knob and rotate to set desired EPR in CMD EPR readout. EPR reference bug will move to corresponding value on EPR indicator.
- When knob is pushed in CMD EPR Readout will blank, EPR reference bug will move to EPR value set with TRP.
ENG_018
Describe the function of the ENG SYNC Selector:
MD-88
- N1 - Left engine N1 is matched to right engine N1 (rpm)
- N2 - Left engine N2 is matched to right engine N2 (rpm)
- OFF - EPR synchronization is available. N1 and N2 synchronization is disabled.
MD-90
- OFF - (EPR sync selected) System matches left engine EPR command to the right engine’s.
- N1 - (N1 sync selected) The system matches left engine N1 to the right engine’s.
ENG_019
Positions and function of ENG IGN switch.
MD-88
SYS A - Selects igniter A with fuel control lever ON.
SYS B - Selects igniter B with fuel control lever ON.
OFF - Removes power from all igniters.
BOTH - Provides power all igniters with fuel ctrl lever ON.
OVRD - Provides power to igniters in both engines, bypassing fuel control levers.
MD-90
AUTO - (Normal) Ignition functions controlled by the EEC (auto-abort available). AUTO position automatically alternates between A and B systems for normal engine starts or provides dual ignition for T/O, approach, engine anti-ice ON, sub-idle (N2) conditions, engine surge and throttle past frangible gate.
ON - EEC continuously powers both igniters (auto-abort not available).
ENG_020
(90) Understand the operation of normal / emergency reverse thrust on the MD-90:
- The MD-90 is equipped with cascade-type reversers.
- Activation of reverse thrust above 60 kts provides max of 1.30 EPR.
- Activation of reverse thrust below 60 knots provides max of 1.07 EPR.
- If initiated above 60 kts, pulling reverse thrust levers past Overrated Thrust (ORT) gate activates emergency reverse thrust increasing reverse thrust an additional 10%.
NOTE: Use of emergency reverse thrust generates an “ENGINE SYSTEM FAIL” message on the OAP and necessitates an engine inspection prior to subsequent operation.
ENG_021
(88) Understand the function of the FUEL Control Levers on the MD-88:
- ON - Normally completes ignition circuit, then turns on fuel.
- OFF - Shuts off fuel, then ignition.
ENG_028
(90) Understand the function of MD-90 FUEL Control Switches on the MD-90:
- ON – Allows EEC to open fuel valve at fuel metering unit
- OFF- EEC closes fuel valve
NOTE: Fuel flow will not begin until 30 seconds after the start valve has opened.
ENG_022
Recall the function/indications of the TEST Button on the Thrust Rating Panel (TRP):
Pushing button causes following readout displays:
- RAT: Displays 12° ± 1
- EPR LIMIT: Displays 2.08 ±.01.
- All lights on panel should be extinguished. When button is released - RAT readout shows ambient temperature - EPR readout will display dashes. - NO MODE light should be illuminated.
NOTE: There is no test on the MD-90 TRP.
