(2)
Rigging Pin Set- VSV, 856A1221, CFM International
(3)
Pull Scale - 0-23 pounds (1-120 N), locally available
(4)
Thermometer - locally available
B. References
(1)
AMM 71-00-00/201, Power Plant
(2)
AMM 71-00-00/501, Power Plant
(3)
AMM 75-31-00/201, Variable Stator Vane Actuator System
(4)
AMM 78-31-00/201, Thrust Reverser
C. Access
(1) Location Zones
506 Engine No. 1 - Fan Frame
606 Engine No. 2 - Fan Frame
D. Procedure
S 015-062-C00
WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO OPEN THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS WHEN YOU OPEN THE THRUST REVERSERS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(1)
Open the thrust reverser halves (AMM 78-31-00/201).
S 485-058-C00
(2)
Use the instructions in the RMS Users Manual to install the VSV position transmitter, junction box and remote trimmer.
NOTE: If this dynamic rigging procedure is to be done at the
____ same time on both engines, you can also install the position transmitter, junction box and remote trimmer on the opposite engine.
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S 485-059-C00
(3)
Use the instructions in the RMS Users Manual to install the position/N2 transmitter.
S 825-061-C00
(4)
Set up the equipment for the VSV dynamic rigging.
(a)
Use the instructions in the RMS Users Manual to set-up the indicator and connect it to the power source.
(b)
Set the stator system to the open position (actuator rod retracted) (AMM 75-31-00/201).
CAUTION: YOU MUST DO A RIG CHECK FOR THE VSV ACTUATOR TO BELLCRANK
_______ ASSEMBLY. A VISUAL INSPECTION OF THE RIG PIN HOLE IS NOT SUFFICIENT.
(c) AIRPLANES WITH CFM56-3B-1 ENGINES; AIRPLANES WITH CFM56-3B-2 ENGINES; Make sure the VSV actuators to the bellcrank assemblies are adjusted correctly as follows:
NOTE: The VSV actuator rod on CFM56-3C-1 engines is not
____ adjustable. Thus, the VSV actuator to the bellcrank assembly rigging is not necessary.
1) Use an external pressure source to operate the VSV system to the full open position (actuator rods retracted) (AMM 75-31-00/201).
2) Try to install the rig pins in the rig pin holes in the left and right VSV bellcrank assemblies. If the rig pin holes do not align to permit an easy rig pin installation, adjust the actuator rod as follows: a) Loosen the jamnut and the key lock from the actuator
rods.
CAUTION: USE THE ACTUATOR ROD HEX ONLY TO TURN THE ROD.
_______ DAMAGE TO THE ROD SURFACE CAN CAUSE A ROD SEAL LEAKAGE DURING AN OPERATION.
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b) Turn the actuator rods on or off the clevis threads to align the holes and install the rig pins.
CAUTION: YOU MUST ALIGN THE KEY LOCK AND HEX NOTCH ON THE
_______ ACTUATOR ROD BEFORE YOU TIGHTEN THE JAMNUT. IF YOU DO NOT ALIGN THE KEY LOCK AND HEX NOTCH, DAMAGE TO THE KEY LOCK CAN OCCUR.
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