2203 mod2 Flashcards
The operation of any reciprocating engine requires that certain precautions be
observed and that all operations be kept within the limitations established by the
manufacturer.
Reciprocating Engine Operating Requirements
What are the following operation of an engine
- Engine oil pressure
- Oil temperature
- Cylinder-head temperature (CHT)
- Engine rpm
- Manifold pressure
- Drop in rpm during switching to single-magneto
operation - Engine response to propeller controls, if a constant speed
(controllable-pitch) propeller is used with the engine - Exhaust gas temperature (EGT)
usually include all instruments required to measure
and indicate the functioning of the powerplant.
Engine Instruments
what are the limited operating ranges?
- Crankshaft speed (rpm)
- Manifold pressure
- Cylinder head temperature
- CAT
- Oil temperature
- Oil pressure
- Fuel pressure
- Fuel flow meter
- Fuel/air mixture setting
Before starting the engine, observe the manifold pressure gauge that should read
approximate atmospheric (barometric) pressure when the engine is not running
Engine Starting
Correct starting technique is an important part of engine operation.
Engine Starting
Engines that have undergone overhaul or major maintenance can have air
trapped in some of the oil passages that must be removed before the first start
Pre-Oiling
No engine should be operated at high-power settings unless its oil pressure and
temperature are within satisfactory limits
Oil Pressure Check
it is important, particularly when the condition of the engine
is unknown. Improperly adjusted idle mixture, intermittently firing spark plugs, and
improperly adjusted engine valves all have an overlapping effect on engine stability
Engine Warm Up
performed to evaluate the functioning of the engine by
comparing power input, as measured by manifold pressure, with power output, as
measured by rpm or torque.
Ground Check
Procedures of Ground check?
- Control position check
- Cowl flaps (if equipped)—open
- Mixture—rich
- Propeller—high rpm
- Carburetor heat—cold
- Check propeller according to propeller manufacturer’s instruction.
- Open throttle to the run-up rpm setting as per manufacturer’s instructions
(specified RPM and manifold pressure). - Ignition system operational check.
checked to ensure proper operation of the pitch control and the
pitch-change mechanism
Propeller Pitch Check
Specific rpm and manifold pressure relationship should be checked during each
ground check
Power Check
With each type of engine installation, specific procedures are used in stopping the
engine.
Engine Stopping
With the increasing complexity of today’s powerplants, maintenance technicians
are more dependent on their ability to utilize published technical information in
performing maintenance.
Troubleshooting
the step-by-step procedure used to determine the cause
of a given fault and then select the best and quickest solution.
Troubleshooting
Step 1
Symptom Recognition
step2
Symptom Elaboration
step 3
Listing of probable faulty functions
step 4
Localizing the fault
Step 5
Isolating the fault to a component
step 6
failure to analysis
typically requires a thorough disassembly, detailed inspection of all components
Aircraft Engine Overhaul
3 categories of Engine Overhaul
Visual
Structural
Dimensional
