B.
References
(1)
AMM 05-51-01/201, Hard Landing or High Drag/Side Load Landing
(2)
AMM 12-15-01/301, Main Gear Shock Strut
(3)
AMM 32-00-20/201, Landing Gear Downlocks
C.
Access
(1)
Location Zones
731/741 Main Landing Gear (MLG)
732/742 MLG Body Doors
733/743 MLG Oleo Doors
D.
Leak Check Procedure
S 862-092
(1)
Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201).
(2)
Inspect the shock struts for leakage.
S 792-093
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S 792-094
(3)
If you find leakage of the shock strut fluid on the inner cylinder, do the steps that follow to make sure the shock strut is serviceable:
(a)
Wipe the surface of the inner cylinder with a clean cloth to remove all of the fluid from the leak.
(b)
Monitor the inner cylinder where it meets the outer cylinder for 15 minutes.
(c)
Make sure the extension of the inner cylinder does not change during this time.
(d)
Make a record of the number of drops which come from the seals during the 15 minutes.
(e)
Make a record of the location of the leak.
(f)
Tow the airplane to cause movement between the inner cylinder and the outer cylinder (AMM 09-11-00/201).
NOTE: The minimum distance the airplane must be moved is two
____
airplane lengths.
(g)
Wipe the surface of the inner cylinder with a clean cloth to remove all of the fluid from the leak.
(h)
Monitor the inner cylinder where it meets the outer cylinder for 15 minutes.
(i)
Make sure the extension of the inner cylinder does not change during this time.
(j)
Make a record of the number of drops which come from the seals during the 15 minutes.
(k)
Make a record of the location of the leak.
(l)
Calculate the average of the number of drops which came from the seals during both of the 15 minute measurements.
NOTE: If the average is less than 30 drops during the 15
____ minutes time, the shock strut is serviceable. If the leakage flows continuously or is greater than 30 drops during the 15 minutes time, the shock strut is not serviceable.
S 212-095
(4) If the leakage stopped, do the steps that follow:
CAUTION: A DEFLATED OR FLAT STRUT CAN CAUSE DAMAGE DURING LANDING.
_______ IF THE AIRPLANE LANDED WITH A DEFLATED OR FLAT STRUT, DO A HARD LANDING INSPECTION PER AMM 05-51-01/201 TO MAKE SURE THERE IS NO DAMAGE.
(a) Continue to monitor the strut for leakage on subsequent landings. If you see more signs of leakage, do the entire leak check procedure again.
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SEAL RETAINER OUTER PIN
CYLINDER (2 LOCATIONS)
1.
ACTIVE DYNAMIC SEAL AND BACKUP RINGS
2.
ACTIVE STATIC INNER SEAL AND CYLINDER BACKUP RINGS
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