BELL HELICOPTER 430 Maintenance Manual page 72

BHT-430-MM-2
5-19. PROGRESSIVE INSPECTION — EVENT 4 (CONT)
DATA REFERENCE
Chapter 53
Chapter 12 and
Chapter 65
Chapter 65
Chapter 64
5-00-00
Page 42 Rev. 15 26 JAN 2007
SCHEDULED INSPECTIONS
INSPECTION TASK DESCRIPTION
RE F E R TO C HA PT E R 53 , TA B LE 53 - 1 F O R
CORRECT TORQUE.
14. Examine the vertical fin assembly for damage. Make sure
the vertical fin attach bolts/nuts have the correct torque. Apply
torque in the tightening direction to the nut while restraining the
bolt head. If lowest value of specified torque range is reached
without nut movement, raise the torque to the highest value of
specified torque range. If the nut moves below the lowest value
of specified torque range proceed with 2 Year Inspection. (T1/
T2)
Examine inspection window(s) and sight glass(es)
for cracking and discoloration. If either of these
conditions are present the part must be removed and
replaced prior to returning helicopter for service.
15. Remove tail rotor gearbox fairing and examine the tail rotor
gearbox for oil leaks and mechanical or corrosion damage.
Make sure the gearbox has the correct fluid level. Make sure the
gearbox is correctly attached. (R2)
16. Inspect tail rotor gearbox retaining nuts for proper torque.
17. Remove the tail rotor gearbox chip detector. Clean and
examine the chip detector. Install the chip detector. (R2)
18. Inspect tail rotor pitch control assembly as follows:
a. Check for excessive radial play between the pitch
control assembly and the tail rotor gearbox output shaft due to a
worn or debonded guide bearing. Radial play in excess of 0.018
inch (0.5080 mm) is considered excessive.
b. Check for worn areas on the tail rotor gearbox output
shaft wear sleeve.
c. Check for worn or rough crosshead bearing set.
CAUTION
NOTE
INITIAL
MECH OTHER