TM 55-1520-240-23-1
1-97
PREPARE HELICOPTER FOR FLYABLE STORAGE — GENERAL
PROCEDURES
(Continued)
1-97
PREPARE DRIVE SYSTEM
1.
Check drive system lubrication and sight gages.
2.
Service drive system (Task 1-54 and 1-89).
AUXILIARY POWER UNIT
3.
Check APU oil level. Service APU, if needed
(Task 1-53).
4.
Start and operate APU (TM 55-1520-240-T).
5.
Shut down APU (TM 55-1520-240-T).
6.
Install APU exhaust cover (Task 1-32).
7.
Seal APU inlet. Use cover or barrier material
(E81) and tape (E388).
PREPARE ENGINES
8.
Preserve engines as follows:
a.
Keep engines and accessories clean.
Observe all precautions.
Dry cleaning solvent (E162) is
combustible and toxic. It can irritate
skin and cause burns. Use only with
adequate ventilation, away from open
flame. In case of contact, immediately
flush skin or eyes with water for
at least 15 minutes. Get medical
attention for eyes.
b.
Clean intake air ducts, plenum chambers,
and compressor inlet screens clean and free
from foreign materials. Use cloth (E120)
damp with solvent (E162) on external parts.
Wear gloves (E186).
NOTE
Steps c and d may be omitted if
engines have been operated recently
and are moisture-free.
c.
Have pilot start engines. Perform engine
ground runup to circulate engine lubricants
throughout engine (TM 55-1520-240-10).
Operate engines at 75 percent rpm. Do not
fly helicopter. Check that engine temperature
and hydraulic pressures are within normal
ranges.
d.
Shut down engines (TM 55-1520-240-10).
e.
Install engine inlet and exhaust protective
covers (Task 1-32).
f.
Cover other engine cowling openings.
Use barrier material (E81). Secure barrier
material with tape (E388).
g.
Record, in aircraft log book on forms DA
2408-13 and DA 2408-15, date engines were
placed in flyable storage. (Refer to DA PAM
738-751.)
PREPARE HYDRAULIC SYSTEMS
9.
Check hydraulic systems for leaks. Repair leaks.
10.
Service flight control and utility hydraulic
system tanks (Task 1-59 or 1-62). Check that
accumulators are pressurized (Tasks 1-64 thru
1-68).
11.
Clean exposed areas of hydraulic actuator
pistons. Use cloth (E120) soaked in hydraulic
preservative fluid (E197). Wipe dry. Use clean
cloth. Apply coat of fluid (E197). Wear gloves
(E186).
PREPARE ROTARY-WING BLADES
12.
Tie down blades (Task 1-26).
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