BHT-412-MM-2
5-00-00
Page 22 Rev. 16 26 FEB 2013
Export Classification C, ECCN EAR99
5. Gearbox assembly for security, condition, corrosion,
damage, and oil leaking.
CAUSE OF ANY DISCOLORATION SHALL BE
DETERMINED AND CORRECTED PRIOR TO
NEXT FLIGHT.
6. Output quill outer couplings (and surrounding area) for
grease leakage, damage, corrosion, and evidence of overheat
as indicated by TEMP-PLATES or coupling discoloration. A
change in color of one or more of the red bordered
TEMP-PLATE dots from white/off-white to black indicates an
overheat condition and may require replacement of both outer
and inner couplings (step 7).
7. Overheat TEMP-PLATES for condition and security.
TEMP-PLATES must not show evidence of over temperature
indication, deterioration, debonding, or excessive discoloration
of the epoxy overcoating.
8. Gearbox for proper oil level and oil for evidence of
contamination.
Chapter 65 TAIL ROTOR GEARBOX
Step 1 though step 4 pertain to helicopters S/N
33001 through 33213 and 36001 through 36019 not
modified by 412-570-001-103 or Pre BHT-412-SI-74
(412SP to 412HP Upgrade).
1. Gearbox assembly for security, condition, corrosion,
damage, and oil leaking.
5-5. DAILY INSPECTION — PART A (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
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