MK7 Aircraft Recovery Equipment Flashcards
What are the classifications of arrestments
Normal arrestment and emergency arrestment
What are aircraft arrestments
Recovery equipment that brings a landing aircraft to a controlled stop by absorbing and dispelling energy developed by the landing aircraft
What is the purpose of the MK7 arresting engine runout control valve ?
To control fluid flow from the engine cylinder to the accumulator
The mk7 recovery equipment is divided into a total of how many major systems?
4
The aircraft weight selector is adjusted while the arresting engine is in the battery position. This adjustment causes a change in the position of what component of the CRO valve?
The upper level
Which of the following statements is correct concerning the valve sleeve and stem movement of the CRO valve?
- At a 4:1 ratio the sleeve and stem move 1/4
What controls the variation in the size of the opening of the CRO valve?
The plunger movement
What is the purpose of the four vehicle elongated holes machined into the retract valve seat?
To allow fluid to enter the valve from the accumulator
What device is installed on the retract valve operating lever to eliminate chatter
Shock Absorber
What controls the flow of hydraulic fluid from the engine cylinder to the accumulator and is considered the heart of the arresting engine?
CROV
What is the maximum operating temperature of arresting gear hydraulic fluid?
170 degrees F
What is the maximum hydraulic fluid tank capacity of the power pack
125 gallons
What is the initial pressure of the arresting gear accumulator
400 psi
What permits a controlled return of fluid from the accumulator back to the engine cylinder?
Retract valve
Inside the accumulator what separates the air side from the fluid side?
Floating piston
What shows on the fluid level indicator of proper amount of fluid is in the system?
Battery
What is the required operating pressure on the automatic lubrication system ?
75-85 psi
What is the function of the cushioning piston in the anchor damper?
Prevents the piston from slamming
What reduces cable peak tension and minimize cable vibration during aircraft arrestment?
Sheave damper
What is the required operating pressure of sheave damper accumulator?
750 psi
When the sheave damper is in battery position , what should be the reading on the fluid level?
2 plus/minus 1
How many types of sheaves are used in MK 7 Mod 3 arresting gear?
- Horizontal sheave, vertical sheave, fair lead sheave
On the Mk 7 Mod 3 arresting gear, how is the retractable sheave operated?
Push button
What is the maximum cross deck pendant height in inches , if measured from the bottom of the pendant to the deck
- 51/2 inches max
What provides a connection between the upper and lower load straps of the barricade and the tensioning pendant of the barricade stanchion?
Multiple release
What are the three positions of the motor controller switch?
Automatic, off, run,
During socket pouring , what is the required temperature of the zinc before pouring?
925-975 degrees
