TB 1-2840-248-20-2
9. Part number. Enter the manufacturer's part number of each subcomponent on the lines below.
10. Serial number. Enter the serial number of each subcomponent on the lines below.
11. O/H or replacement life.
a. If the item in block 8 has an established MAOT, enter the MAOT in this block.
b. If the item in block 8 is a condition change component enter "COND" in this block.
12. Historical counts at last depot repair.
a. The purpose of these blocks is to determine what the cumulative counts on the subcomponents were
when the subcomponents were installed on the component or module and the total cumulative counts on the
module or component at the time of subcomponent installation.
b. When this form is prepared for the engine, LCF-1, LCF-2, and T/TI counts will not be entered for
modules or components that do not have a separate DA Form 2408-16-1. Operating hours only will be entered
for components and modules not having a separate DA Form 2408-16-1.
c. Two entries will be made in each block. One entry at the top of the block and one entry at the bottom of
the block. The total cumulative counts for the engine at the time of component or module installation will be
entered in the top portion of this block. The total cumulative counts for each component or module at the time
of installation on the engine will be entered in the bottom portion of each block. This information must be
known to
calculate usage accurately and to replace retirement change components at the proper intervals.
d. When installing a replacement subcomponent;
(1) Obtain the information for the top portion of block 12 from line 1, block 6 on the front side of the
form. This entry represents the total cumulative counts on the module or component at the time the
subcomponents were installed.
(2) Obtain the total cumulative counts for the subcomponent being installed from block 13 of the
subcomponent DA Form 2410. Enter this information in the bottom portion of block 12 for the subcomponent.
This entry represents the total cumulative counts on the subcomponent at the time the subcomponent is
installed on
the module or component.
e. When removing a subcomponent from the module or component;
(1) Calculate the total cumulative counts for each subcomponent by subtracting the module or
component historical counts entered in the top portion of block 12 from the new entry in line 1, block 6. Enter
this figure in block 7 of the DA Form 2410 prepared for the subcomponent.
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