Aircraft jacks have various scheduled and un-
scheduled maintenance requirements, such as repair,
adjustment, lubrication, and performing load tests. To
comply with these requirements, you will need the
applicable Maintenance Instruction Manual; Aircraft
Jacks, Various, NAVAIR 19-70-521; and Periodic
Maintenance Requirements Manual, NAVAIR
19-600-135-6-2.
AXLE JACKS.--Axle jacks are primarily used
for raising one main landing gear or the nose gear of
aircraft for maintenance of tires, wheels, brakes, and
struts. There are two types of axle jacks, and all
different sizes (lifting capacities). The two types are the
hand-carried axle jack (fig. 1-23) and the outrigger axle
jack, commonly known as the rhino jack (fig. 1-24).
Designation for an A3-1HC is as follows:
A = axle jack
3 = load capacity in tons (followed by a dash)
AS1f0321
Figure 1-23.--A3-1HC axle jack.
1 = specific jack identification number
attached for steering folds up in half for storage, and is
HC = hand-carried
held rigid in the unfolded position by a latch and pin
assembly. A 30-foot collapsible duct hose is used to
TRIPOD JACKS.--Tripod jacks are primarily
transfer air from the unit to the aircraft. The
used for lifting the entire aircraft off the ground or deck.
refrigeration system is serviced in the same manner as a
There are two types of tripod jacks, variable height (fig.
A/M32C-17.
1-25) and fixed height (fig. 1-26). Designation for a
T20-1VH5 is as follows:
Q1-41.
What type refrigerant is used to service
T = tripod jack
the A/M32C-17 and A/M32C-21 mobile
air-conditioners?
20 = load capacity in tons (followed by a dash)
1.
R-12
1 = specific jack identification number
2.
R-134
3.
R-22
VH = variable height
4.
R-24
5 = the number of leg extension kits available for
AIRCRAFT MAINTENANCE EQUIPMENT
this jack
All aircraft require scheduled or unscheduled
maintenance at one time or another. Some equipment
used to support the maintenance efforts of the squadron
include hydraulic jacks, aircraft maintenance stands,
and engine transportation trailers.
Hydraulic Jacks
All aircraft hydraulic jacks are designated as either
axle jacks or tripod jacks. They come in various shapes,
sizes, and maximum load ratings, and are used for
different applications. The correct jacks for a specific
aircraft can be determined by consulting the Index and
AS1f0322
Application Tables for Aircraft Jacks, NAVAIR
19-70-46.
Figure 1-24.--A45-2OR axle jack.
1-26
