ICA-D212-725 (12)
Page 9 of 24
CHAPTER 12 – SERVICING (12-00-00)
COPYRIGHT
2007 BY DART AEROSPACE LTD.
THIS DOCUMENT IS PRIVATE AND CONFIDENTIAL AND IS SUPPLIED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED FOR ANY PURPOSE OR COPIED OR COMMUNICATED TO ANY
OTHER PERSON WITHOUT WRITTEN PERMISSION FROM DART AEROSPACE LTD.
Revision:
6
Date: 13.08.26
12.7 OIL
SYSTEM
The engine, transmission, tail rotor drive
gearboxes and main rotor hub may be serviced
with MIL-PRF-7808, MIL-PRF-23699, or DOD-
PRF-85734 (C-030) (except engine) lubricating oil.
Refer to MD-D212-725-1 for list of approved oils
and restrictions.
It is recommended when systems are serviced,
either for an oil change or routine quantity
servicing, that the oil container be agitated prior to
opening. If oil pressure fluctuation is accompanied
by foaming, drain and service with agitated oil.
When using quart cans, open end which has been
on bottom during storage.
12.8
CHANGING OIL TYPES
NOTE
An appropriate entry shall be made in helicopter
and engine logbooks. The entry shall show type
and brand name of oil to prevent inadvertent
mixing of lubricating oils. Refer to engine
manufacturer’s manual for additional information,
and oil change intervals for the engine.
NOTE
Do not use MIL-PRF-23699 (C-011) or DOD-PRF-
85734 (C-030) lubricating oil when ambient
temperature falls below -40°F (-40°C).
12.8.1
Before changing types of oil from MIL-
PRF-7808 (C-010) to MIL-PRF-23699 (C-011), or
to DOD-PRF-85734 (C-030), replace decals
shown in Chapter 11, with appropriate decals
denoting type of oil in system.
NOTE
MIL-PRF-7808 (C-010), MIL-PRF-23699 (C-011),
or DOD-PRF-85734 (C-030) lubricating oils should
not be mixed. If this should occur, drain system
and refill with approved oil.
12.8.2
To change oil type, perform the
following steps:
12.8.2.1 Drain lubricating oil from system.
Inspect and clean filter and strainers as required.
12.8.2.2 Fill
oil
system
with specification of
lubricating oil to be used.
12.8.2.3
Operate system for a period of 30
minutes to 1 hour to heat oil to operating
temperature. Shut down engine.
12.8.2.4
Inspect and clean system oil filters and
strainers. If heavy contamination of filters and
strainers is noted, proceed with steps 12.8.2.5
through 12.8.2.8. If little or no contamination of
filters and strainers is noted, release helicopter for
service and proceed with steps 12.8.2.7 and
12.8.2.8.
12.8.2.5
Drain lubricating oil from oil system and
discard oil.
12.8.2.6
Refill oil system with specification of
lubricating oil to be used and release helicopter for
service.
12.8.2.7
Inspection and cleaning of oil system
filters and strainers is required after five and fifteen
hours of operating time.
12.8.2.8 After fifteen hour inspection of oil
system filters and strainers, revert to normal
inspection interval.
12.9 ENGINE
OIL
SYSTEM
The supply tank for the engine oil system is located
on the right side of the forward engine firewall. The
oil level in the tank can be checked by viewing the
sight gage indicators on the tank. The sight gage
indicators are accessible through inspection door.
For access to the filler cap and filler cap dipstick,
the lower engine cowl must be removed. Service
the tank with an authorized type MIL-PRF-7808 or
type MIL-PRF-23699 oil. (Refer to MD-D212-725-1
for approved list.)
NOTE
Numbers 1 through 4 appearing on dipstick indicate
level of oil in engine oil tank.
Содержание ICA-D212-725
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