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AIRFRAME ORALS
CHAPTER 9 - AIRCRAFT LANDING GEAR SYSTEMS
Question | Answer |
---|---|
WHAT IS THE PURPOSE OF A TORQUE LINK ON AN OLEO STRUT? | TO KEEP THE WHEEL IN ALIGNMENT AND PREVENT THE PISTON FROM COMING OUT OF THE CYLINDER. |
A LANDING GEAR SHOCK STRUT SHOULD BE INFLATED WITH WHAT GAS(ES)? | NITROGEN OR DRY AIR. |
WHAT CONDITIONS SHOULD A MECHANIC LOOK FOR DURING A REGULAR INSPECTION OF THE EXPOSED PISTON SECTION OF A LANDING GEAR? | CLEANLINESS, EVIDENCE OF DAMAGE, AND PROPER EXTENSION. |
WHAT PREVENTS AIR FROM LEAKING OUT BETWEEN THE TWO HALVES OF A SPLIT WHEEL ASSEMBLY? | AN O-RING. |
WHY ARE FUSIBLE PLUGS INSTALLED ON SOME AIRCRAFT WHEELS? | TO RELEASE THE PRESSURE GENERATED BY HEAT BUILD-UP BEFORE A TIRE BLOWS. |
WHAT SAFETY PRECAUTION MUST BE TAKEN WHEN REMOVING A WHEEL FROM AN AXLE OR WHEN DISASSEMBLING A WHEEL? | VERIFY THAT THE TIRE IS COMPLETELY DEFLATED BEFORE REMOVING A WHEEL FROM AN AXLE OR BEFORE WHEEL DISASSEMBLY. |
WHAT ARE THE VISIBLE SIGNS OF EXCESSIVE HEATING ON A WHEEL BEARING? | THE BEARING SURFACES SHOW DISCOLORATION. |
HOW ARE THE PILOT'S NOSE WHEEL STEERING MECHANISM USUALLY ACTUATED ON A SMALL AIRCRAFT? | STEERING MECHANICAL LINKAGE CONNECTED TO THE RUDDER PEDALS. |
HOW IS THE NOSE WHEEL STEERING MECHANISM USUALLY ACTUATED ON A SMALL AIRCRAFT. | BY MEANS OF A MECHANICAL LINKAGE CONNECTED TO THE RUDDER PEDALS. |
WHAT IS THE NAME OF THE UNIT THAT PREVENTS A NOSE WHEEL FROM VIBRATING OR OSCILLATING? | A SHIMMY DAMPER. |
WHAT ARE THE MOST COMMON SOURCES OF POWER USED TO EXTEND AND RETRACT LANDING GEAR? | HYDRAULIC PRESSURE AND ELECTRIC MOTORS. |
AT WHAT TIMES SHOULD A GEAR RETRACTION CHECK BE PERFORMED? | DURING ANNUAL OR OTHER INSPECTIONS AND FOLLOWING A HARD LANDING. |
WHAT MECHANISM(S) ENSURE THAT A NOSE WHEEL IS NOT TURNED AS IT RETRACTS INTO ITS WHEEL WELL? | INTERNAL CENTERING CAMS IN THE STRUT OR EXTERNAL TRACK. |
NAME SEVERAL TYPES OF BRAKE ACTUATING SYSTEMS. | INDEPENDENT MASTER CYLINDERS, BOOSTED BRAKES, AND POWER-CONTROLLED BRAKES. |
WHAT IS THE FUNCTION OF AN ANTI-SKID SYSTEM? | ANTI-SKID SYSTEMS ALLOW LARGE AIRCRAFT TO ACHIVE MAXIMUM BRAKING EFFECTIVENESS WITHOUT ALLOWING WHEELS TO SKID OR LOCK. |
WHAT IS THE PURPOSE OF A DEBOOSTER? | TO REDUCE HYDRAULIC SYSTEM HIGH PRESSURE TO A LOWER VALUE FOR MORE SATISFACTORY BRAKE ACTION. |
DESCRIBE TWO METHODS OF BLEEDING BRAKES. | A PRESSURE POT CAN BE ATTACHED TO THE BLEEDER VALVE AND FLUID FORCED BACK TOWARDS THE MASTER CYLINDER AND/OR RESERVOIR, OR THE MASTER CYLINDER CAN BE USED FOR FORCING FLUID FROM THE RESERVOIR TO THE BRAKES. |
BEFORE A BRAKE SYSTEM CAN BE INSPECTED FOR LEAKS, WHAT ACTION MUST BE ACCOMPLISHED? | PRESSURE MUST BE APPLIED TO THE SYSTEM. |
WHAT MAINTENANCE FUNCTION HAS THE GREATEST IMPACT ON TIRE SERVICE LIFE? | ENSURING THAT THE TIRES ARE PROPERLY INFLATED. |
WHAT EFFECT(S) DOES UNDER-INFLATION HAVE ON AIRCRAFT TIRES. | INTERNAL HEAT DAMAGE POSSIBLY LEADING TO PREMATURE TIRE FAILURE, AND MORE TREAD WEAR ON THE SHOULDERS THAN IN THE CENTER. |