Handling, Servicing & Maint.
Pilot's Flight Manual
7-10
Reissued: 16 Jan 2019
Note
: Do not open the trans mis sion if there is blow ing
dust or sand in the im me di ate area.
Check oil level via sight gage or dip stick
Main tain oil level be tween LOW and FULL grad u a tion.
Using oil filler can, add de sired quan tity of oil.
Re check oil level. (Wipe dip stick clean if in stalled)
Re-in stall and se cure filler cap and/or dip stick.
Vi sually check main trans mis sion and com po nents for ev i dence of
oil leak age and se cu rity
Drain ing - Main Trans mis sion
Place suit able con tainer un der main trans mis sion oil sump. Re -
move mag netic drain plug and self-clos ing valve. Al low suf fi cient
time for all oil to drain from sump.
If dam aged, re place O-rings used with drain plug and valve.
Re in stall drain plug and self-clos ing valve in oil sump; lockwire in
place.
7-10. MAIN ROTOR DAMPERS - SER VICING (Early Model Air craft)
Note:
Late model he li cop ters are equipped with three
elastomeric damp ers. The elastomeric is eas ily rec og -
nized; a large di am e ter cy lin dri cal body is at tached di -
rectly to the blade root fit ting, a rod and clevis pro trude
from the op po site end and at tach to the pitch hous ing.
The ac tion of the damper is in a straight line. No ser vic -
ing or main te nance of the damper is re quired other than
a vi sual in spec tion for gen eral con di tions.
Three damp ers con trol the lead and lag ac tion of the main ro tor
blades. In side the damper a com bi na tion of ro tat ing and fixed fric -
tion plates, held in com pres sion and work ing in oil, damp blade
move ment. The damp ers at tach to the pitch bear ing case and the
This Document contains technical data subject to EAR. See WARNING and classifications on first page.
SCHWEIZER
Model 269C Helicopter
CSP Book 1 CSP-C-1.indd 164 8/4/19 12:46 PM
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