Textron Bell 412 Maintenance Manual page 79

5-6. 100 HOUR/12 MONTH INSPECTION — PART A (CONT)
DATA REFERENCE
Chapter 96
Chapter 96
Export Classification C, ECCN EAR99
SCHEDULED INSPECTIONS
INSPECTION TASK DESCRIPTION
1. Calibrate pilot, copilot compass systems, and standby
magnetic compass.
2. Drain pitot-static system of any accumulated moisture.
3. Test pitot-static system for leaks.
BATTERY SYSTEM
1. Service battery in accordance with battery manufacturer's
recommendation.
2. Inspect battery compartment for general condition.
3. Check battery mount for security and corrosion.
4. Perform functional test of battery temperature sensor
caution light.
EMERGENCY BUS AND POWER DIODES
Every third 100 hour inspection (300 hours) or every
12 months:
1. Perform operational check of emergency bus system as
follows:
Helicopters S/N 33001 through 33107, except those
modified for CAA, remove screw, spacer, and washer
installed in the emergency load switch guard.
a. Inspect EMERG BUS INTC circuit breaker for wear.
Operate circuit breaker manually and check by feel. Worn or
loose circuit breaker is not acceptable. Close circuit breaker.
b. Place all switches in OFF or NORM position and close
all circuit breakers.
c. Connect battery.
NOTE
7 NOV 2016 Rev. 25
BHT-412-MM-2
INITIAL
MECH OTHER
5-00-00
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