Ground Handeling And Servicing Flashcards
Name atleast 3 possible hazards that may be encountered during typical ground operations such as engine run up or taxi
Possibility of fire, especially on engine start
Turning props, rotors, prop or jet blast and inlet areas
Other aircraft, vehicles, people, and obstacles
Foreign objects
High noise level causing hearing damage
Hydraulic lock in radial engines
Weathervaning of tail wheel aircraft
What is the most generally used knot for tying down small aircraft?
Bowline knot (although other slipknots may be used)
What knot is typically used when securing aircraft with rope?
Bowline knot
Describe the precautions that should be taken to protect life and property while starting and running an aircraft engine
STUDY THE PROCEDURES IN THE AIRPLANE FLIGHT MANUAL
Check prop or inlet area for FOD
Ensure that prop or jet blast doesn’t blow into hangars or other aircraft
Have fireguard ready
What are the safety requirements when starting and running a power plant?
Use correct checklist Position aircraft into the wind Check prop blast area Secure external power cart Use a fireguard
If an engine induction fire occurs while starting a reciprocating engine, what procedure should be followed to extinguish the fire?
Continue cranking the engine to try and suck the fire out
If cranking the engine does not work, extinguish fire using carbon dioxide
What safety procedures must be observed when hand propping a small aircraft engine?
Become thoroughly trained Have a qualified person in cockpit Check brakes Call “switch off” before moving the prop Make sure to have sound footing Swing prop with the flat of your hand and move back from prop arc
What procedure should be followed prior to starting a large radial engine to detect and/or prevent a hydraulic lock in the cylinders?
Pull the prop through by hand for 3-4 complete revolutions
Resistance to the prop turning indicates a possible hydraulic lock in atleast one of the cylinders
What is the cause of hydraulic lock in large radial engines?
Oil seeps by the piston rings and accumulates in the combustion chamber of lower cylinders
When a piston comes up on its combustion stroke the incompressible liquid seizes it.
What is “hot start” when starting a jet engine?
Ignition occurs with an excessively rich mixture, leading to a rapid temperature rise that can exceed the exhaust gas temperature limit
When towing a large aircraft with a tow tractor what brakes should be used to stop aircraft?
Always use tractor brakes unless for an emergency
Why should aircraft technician become familiar with standard light signals?
Light signals may be used when taxiing an aircraft without a radio or when radio becomes inoperative on a tower controlled airport
What may result if aviation gasoline that is contaminated with jet fuel is used in a reciprocating engine?
Unsafe for use and will result in engine failure
What does the number 100 signify in 100LL aviation gasoline?
Octane rating or lean mixture performance number
What color is low lead 100 dyed?
Blue
Describe the system used to designate performance rating of aviation gasoline
Fuels below 100, octane numbers are used
Fuels above 100 the numbers represent the performance rating of the fuel compared to 100% iso octane
Is it permissible to use AVGAS in a turbine engine?
Limited operation may be allowed by manufacturer
Continued use may reduce efficiency due to lead deposits on the turbine blades
What is the result of mixing aviation gasoline with jet fuel in a turbine engine?
When avgas is mixed with jet fuel, the tetra ethyl lead in the gasoline will form deposits on turbine blades and vanes
Continued use of mixed fuel may cause a loss in engine efficiency
No detrimental effect on engine as long as usage is limited
What are some of the possible outcomes of using a lower grade of AVGAS than the specified grade?
Increased chance of engine damage due to detonation
Loss of engine power
Increased probability of overheating
Part 23.973 of the FAA regulations specifies that certain markings must be placed adjacent to fuel filler openings.
What markings are used for reciprocating engine powered airplanes
Fuel grade and the word “AVGAS”
The marking requirements for oil tank filler openings are specified by FAR 23.1157
What markings are required for a piston powered airplane?
The word OIL and the permissible grades and/or types or a reference to the appropriate airplane flight manual for permissible grades/types
Describe the important precautions that should be observed when fueling an aircraft
Using correct fuel
Properly ground aircraft and refueling unit
Protect the aircraft surfaces from hose and nozzle damage
Why must aircraft and fuel tanks be grounded with a grounding cable?
To eliminate build up of static electricity that could result in an explosion
Where can the standard aircraft taxi hand signals be found?
Aeronautical information manual (AIM)
What publication lists the standard FAA hand signals a taxi signalmen should use?
FAA airman’s information manual
Under what conditions should an engine be pre-oiled?
Prior to starting a new engine or one that has been preserved for storage
Ensures adequate lubrication on initial start up
Under what conditions may automobile gasoline be used in an aircraft engine?
Only if approved by the FAA usually by the issuance of a supplemental type certificate (STC)
What are indications of water in aircraft fuel after draining a sample from the fuel sumps?
Sample may have a cloudy or hazy appearance or a solid slug of water
What damage is most likely to occur if excessive force is exerted on the crankshaft when there is liquid lock?
The force can bend or break a connecting rod or permanently damage the cylinder
What are the functions of tetra ethyl lead in AVGAS?
To lubricate and reduce detonation
What are safety precautions when using a drill press?
Wear ear/eye protection Clamp work piece securely Adjust for proper rpm Stop machine completely before adjusting work piece Clean area when finished
Why is a tire cage recommended when inflating tires?
To prevent possible personal injury should the tire or wheel fail
What type of fire can carbon dioxide (CO2) extinguisher be used on?
Class A/B/C type fires
