Maintenance Practices; Main Rotor Track And Balance; Installing Main Rotor Blade Tracking Targets - MD Helicopters MD Explorer Servicing And Maintenance

1. Main Rotor Track And Balance

A. Installing Main Rotor Blade Tracking
Targets
(Ref. Figure 201)
Special Tools
(Ref. CSP−SPM)
Item Nomenclature
T903 Main Rotor Blade Track and Balance Kit
NOTE:
Blade tracking targets must be
installed in the correct sequence. Blade
number one is located above nose of helicop­
ter when swashplate interrupter is above
azimuth sensor. Blades number 2, 3, 4, and
5 are numbered in sequence opposite the di­
rection the rotor turns.
DIRECTION
ROTOR TURNS
BLADE 2
BLADE 1
TARGET INSTALLATION SEQUENCE LOCATOR
4
5
3
1. AZIMUTH SENSOR
2. INTERRUPTER
3. SCREW
Figure 201. Main Rotor Blade Tracking Target Installation
MD Helicopters, Inc.
Rotorcraft Maintenance Manual
VIBRATION AND NOISE ANALYSIS

MAINTENANCE PRACTICES

BLADE 3
BLADE 4
BLADE 5
INBOARD VIEW OF TAB
6
(1). Release rotor brake, refer to current
Rotorcraft Flight Manual (Ref. Section
01-00-00, Table 201).
(2). Turn main rotor until swashplate
interrupter (2) is positioned above
azimuth sensor (1).
(3). Remove screw (3) from forward rotor
blade (4).
(4). Install blade tracking target (6) number
one on blade tip. Torque screw.
(5). Repeat steps (3). and (4). to install
blade tracking targets (6) numbered
two, three, four and five on each rotor
blade, in sequence opposite the direc­
tion the rotor turns.
2
1
4. ROTOR BLADE
5. BLADE WEIGHT COVER
6. TRACKING TARGET
18-00-00
CSP−900RMM−2
9G18-003B
Page 201
Revision 29