help of the PHM ship crew. Certain organizational level
bearing lubrication and to the fire-extinguishing
tasks, such as daily preventive maintenance that cannot
systems for fire-fighting purposes.
be scheduled for in-port periods and limited corrective
BILGE DRAINAGE SYSTEM
maintenance, are performed at sea. Normally, the PHM
crew will perform underway maintenance by using only
The bilge drainage system provides the PHM with
the standard test equipment and tools that are carried
a means for dumping fluids from the bilges and voids.
aboard the PHM and the significant BITE. The onboard
This system also provides a method for storing these
repair parts of the PHM are very limited in number and
fluids until they can be off-loaded to a receiving facility.
variety. Usually, they consist of fuses, bulbs, and critical
modules and parts.
The bilge drainage system consists of electrically
driven fixed bilge pumps, a portable bilge pump, fluid
Most routine organizational level maintenance
storage tanks, a transfer pump for off-loading, and fluid
actions are accomplished in port during 2-day weekly
level switches in the bilges, voids, and storage tanks.
upkeep periods that follow each PHM mission. During
these upkeep periods, the PHM crew, with the MLSG,
p e r f o r m s preventive maintenance scheduled for
PHM SYSTEMS MAINTENANCE
c o m p l e t i o n weekly. They also perform corrective
The PHM is supported by a progressive ship
maintenance required to restore systems and
maintenance concept. This means that the individual
equipments to operational standards.
P H M is designed so it will acquire significant
m a i n t e n a n c e support from external sources. This
Intermediate Level Maintenance
concept clearly conforms with the PHM's mission,
physical characteristics, and specified manning levels
Intermediate level maintenance is conducted in port
that demand that onboard maintenance be kept to a
by MLSG personnel. The MLSG facility consists of a
minimum. As a result, the overall maintenance concept
c o m p l e x of containerized mobile facilities. These
f o r the PHM gives primary consideration to the
facilities provide diagnostic skills, special tools, test
accomplishment of maintenance tasks while the ship is
equipment, technical manuals, and other maintenance
resources not available aboard the PHM. The PHM is
scheduled for a 7-day technical availability period each
In other words, the basic concept of progressive ship
month to allow the completion of more extensive
maintenance for the PHM de-emphasizes corrective
maintenance tasks. The ship is also scheduled for a
maintenance at the shipboard level and emphasizes the
15-day restricted availability period each quarter to
r o l e of both the organizational and intermediate
permit the installation of service changes and other
maintenance levels of the mobile logistic support group
maintenance actions requiring extended periods.
(MLSG). This concept also highlights the role of
standard depot level maintenance.
Depot Level Maintenance
MAINTENANCE REPAIR LEVELS
Depot level maintenance is conducted at a ship
The maintenance repair levels for the PHM are
repair facility, at a shipyard, or at the shipbuilder's
o r g a n i z e d into three groups. These three groups,
facilities. The work accomplished at the depot level
arranged in increasing order of complexity are
consists of major repairs, overhauls, modifications,
rework, and maintenance tasks beyond the scope of the
organizational level maintenance,
MLSG. The depot repair point for the PHM LM2500
gas turbine is NADEP, North Island, California. The
intermediate level maintenance, and
Garrett ME 831-800 gas turbine receives depot level
depot level maintenance.
maintenance at the contractor's facilities.
I n the following paragraphs, we will briefly
describe the maintenance levels used on the PHM,
This chapter has provided you with a variety of
Organizational Level Maintenance
information to help you become familiar with the
Organizational level maintenance is the routine
propulsion systems and electrical systems on the LCAC
maintenance that is performed by the MLSG with the
and PHM class ships.