239.472
Figure 6-19.—Checking for silver indicator.
This completes the testing for leaks within the
flotation assembly. To complete the calendar
inspection, you will have to inspect the remaining
components of the life preserver.
VISUAL INSPECTION
The visual inspection is performed along with
each calendar inspection, at which time it is
performed before you perform the leakage test.
To perform a visual inspection, inflate the
preserver to 1 psi and look it over real good. Look
for any fabric cuts, tears, deterioration, or
abrasion. Any of these defects can cause leakage.
Check the valve stem for security and ensure
that the silver indicator is not visible in the firing
check port (indicator hole) (LPU-23/P and
LPU-24/P). See figure 6-19. If the silver indicator
is visible, the inflator is spent and the automatic
feature of the inflator is negated. A new inflator
should be installed on the life preserver to replace
the previously spent inflator. Refer to NAVAIR
13-1-6.1.
LPU-23/P and LPU-24/P series preservers
use the FLU-8A/P automatic inflator. The service
life of each FLU-8A/P series automatic inflator
is 66 months from the date of manufacture. If
service life expires prior to the next scheduled
calendar inspection, replace the inflator. Refer
to NAVAIR 11-100-1, Cartridges and Cartridge
Actuated Devices for Aircraft and Associated
Equipment. Also refer to NAVAIR 13-1-6.2,
section 2-5, Cartridges and Cartridge-Actuated
Devices (General Safety Instructions).
Battery Visual Inspection, LPU-23/P
(Series) and LPU-24/P (Series)
To inspect the batteries installed in the
FLU-8A/P series inflator, proceed as follows:
WARNING
NO OBJECTS SHOULD BE INSERTED
IN SENSOR PLUG SIDE PORTS FOR
ANY REASON.
With the aid of a standard 17/32-inch socket,
remove the sensor plug cap. Remove the battery
and check it for leakage and corrosion. Check the
sensor plug cap for cracks. The battery has a two-
letter code stamped on it that corresponds with
the month and year of manufacture. The date of
manufacture for the battery, PN 849AS 160, is
displayed in the lot number stamped on the
battery case. The battery has a total life of 4 years
from the date of manufacture. Replace any
battery if the total life of the battery expires prior
to the next calendar inspection. Check this date
of manufacture on each battery. Also check the
date of installation recorded on the Aviation Crew
Systems History Card.
Reinstall or replace battery if needed. Ensure
that the date of installation and date of
manufacture are recorded on the Aviation Crew
Systems History Card. See figure 6-20 for battery
arrangement.
Battery Voltage Testing, LPU-23/P
(Series) and LPU-24/P (Series)
Before installing any battery,
be sure that it has enough energy
you must
to operate
the FLU-8A/P inflator. A digital reading
voltage multimeter must be used for this test.
239.473
Figure 6-20.—Battery arrangement.
6-32
