ICON A5 MM : Flight Controls : Pitch Controls : Maintenance Instructions : Rigging Pitch Controls
Rigging Pitch Controls
100138-00
Use the following procedure for elevator rigging.
Applicable Aircraft Serial Numbers
All
Type of Maintenance
Line
Level of Certification
A&P
Task Specific Training Required
No
Special Tools Required
Aircraft Cable Tensiometer
Parts Required
As needed based upon inspections and condition of parts. Contact ICON Aircraft for assistance as needed. A list of part numbers in the elevator cable system is below.
Number
Name
Quantity
ICA002203
SECTOR ASSY, PITCH, AFT
1
ICA002491
CONTROL CABLE, PITCH, FWD-UPR
1
ICA002495
CONTROL CABLE, PITCH, FWD-LWR
1
ICA002504
CONTROL CABLE, PITCH, AFT-UPR
1
ICA002508
CONTROL CABLE, PITCH, AFT-LWR
1
ICA008756
BRACKET ASSY, PITCH SECTOR
1
NAS77C4-005
BUSHING, FLNGD, UNLINED, CRES, .250X.050
2
ICA009226
BUSHING, FLANGED, .250X.085X.032
2
MS20392-1R41
PIN, STR, HEADED, DRILLED SHK, CRES, .125X1.281
1
MS20392-1R43
PIN, STRAIGHT, HEADED, DRILLED SHANK
1
MS21043-4
NUT, SLFLKG, RDC HEX, CRES, .250-28
2
MS21251-B5L
TURNBUCKLE BODY, CLIP LKG, BRASS, .156X.250-28X4.00
2
MS24566-4B
PULLEY, CONT, AFB, .188X3.01
4
MS24665-151
PIN, COTTER, CRES, .063X.500
2
MS24665-153
PIN, COTTER, CRES, .063X.750
8
ICA002195
SECTOR, PITCH, FWD
1
ICA009551
DOWEL, PITCH SECTOR STOP
2
ICA009472
PLATE, ANTI ROT FLG, PITCH SECTOR STOP
2
WS-50-S16
RETAINING RING, EXT SPIRAL, 316 SST, .467X.045
2
AN3C10A
BOLT, MACH, CRES, 10-32X.625
2
ICA012054
PUSHROD, ELEVATOR
1
91630A472
INSERT, HELICAL, SCREW LOCK, 18-8 SST, 10-32X.380
2
MS21256-2
CLIP, LKG, TRNBKL, 1.955
4
MS20995C20
WIRE, SAFETY, CRES, .020
1
ICA012237
BEARING, SLEEVE, NYLON, .625X.500X.750
4
Aircraft System
06—Flight Controls
Safety Equipment
As Needed
Consumables
None
Task Instructions
1. Remove water rudder access panel and AFT bulkhead baggage panel. (Removal and Installation of Inspection Panels and Fairings) (Baggage Sidewall Panel Removal)
2. Remove left hand and right hand forward and main cockpit floor boards.(Remove Cockpit Floorboard)
3. Remove baggage floor boards. (Baggage Floor Removal) Retain all fastening hardware.
4. Remove fuel tank. (Remove Fuel Tank Assembly) Retain all fastening hardware.
5. Remove center console bucket and throttle bezel. (Center Console Bucket Removal)(Throttle Handle and Bezel Removal) Retain all fastening hardware.
6. Remove Horizontal Tail. (Horizontal Tail Removal) Retain all fastening hardware.
7. Inspect all components within the pitch circuit for excessive wear. Any components that show excessive wear or damage must be replaced with new components.
8. Install .250 in diameter rig pin through the center console and forward pitch sector. Figure 111
9. Install .1875 in diameter rig pin through the aft pitch sector in the vertical tail. Figure 111
Figure 111. Pitch System Rig Pins
10. Use a tensiometer at least 8 in away from turnbuckles to rig both the upper pitch control cable and lower pitch control cable (cable thickness = 1/8 in). Adjust turnbuckles as required to set cable tension to 20 – 35 lbs. Refer to Figure 112. Operate tensiometer per its manufacturer’s instructions.
Figure 112. Pitch Circuit Tensioning
11. Install locking clips in each turnbuckle. Figure 113
Figure 113. Locking Clip Locations
12. Remove rig pin in the aft pitch sector in vertical tail. Figure 111
13. Install horizontal tail and removable HT tips. (Horizontal Tail Removal and Installation)(Horizontal Tail Tip Pin)
14. Ensure the rig pin in the FWD pitch sector is still installed.
15. If installed, remove the hardware which secures the elevator push rod to the elevator control horn. Figure 114
Figure 114. Control Horn Hardware Installation
16. Place the digital protractor on top of the elevator and zero the digital protractor while the elevator is in its neutral position, the trailing edge of the elevator should align with the HT tips.
17. After setting the zero position of the elevator, lower the elevator into the -2° position.
18. Adjust the rod end as necessary so that the rod end lines up with the elevator control horn while the elevator is in the -2° position. This will be the initial adjustment. If necessary, final adjustments will be made at a later step if required. Figure 115
Figure 115. Elevator Rigging
19. Temporarily install the hardware which secures the elevator push rod to the elevator control horn. Figure 114
20. Remove the FWD pitch sector rig pin. See Figure 111.
21. Using the digital protractor, check the maximum upward and downward deflection of the elevator. If required, adjust the elevator push tube rod end as necessary to achieve the following:
a. 19° ± 1° upward deflection
b. 21° ± 2° downward deflection
22. Check the FWD and AFT pitch secondary stop:
a. Apply 16±2 lb at the center of the control stick grip. Force should be applied FWD and AFT.
b. Verify that contact is made with the secondary pitch stops (located in keel, below center console) at the specified force.
c. Verifying that the primary pitch stops (located in vertical tail) contacts prior to the secondary stops. Figure 116
23. Adjust the bolt on the secondary stops as needed to achieve contact when specified force is applied. Figure 116 If the secondary stops get contacted before the primary stops, not achieving the elevator travel limits, it is acceptable to remove the bolt on the bottom secondary stop.
Figure 116. Secondary Stops Location
24. Once the requirements for the upward and downward deflections have been met, install the hardware to connect the pushrod to the elevator control horn. Torque the pushrod jam nut to 60 in-lbs. Torque the bolt to 20 in-lbs.
25. Ensure that there is no rubbing, binding, or any signs of interference while the elevator is moved throughout its entire range of motion.
26. Install Horizontal Tail. (Horizontal Tail Installation)
27. Install center console bucket and throttle bezel. (Center Console Bucket Installation)(Throttle Handle and Bezel Installation)
28. Install fuel tank. (Install Fuel Tank Assembly)
29. Install baggage floor boards. (Baggage Floor Installation)
30. Install seat back and seat pan. (Install Seat Back) (Seat Pan Installation)
31. Install left hand and right hand forward and main cockpit floor boards. (Install Cockpit Floorboard)
Verification Method
Conduct the Check Elevator Rigging Procedure to verify proper rigging. (Inspect Pitch Rigging)