ICON A5 MM : Landing Gear : Main Landing Gear : Maintenance Instructions : Main Landing Gear (MLG) Installation
Main Landing Gear (MLG) Installation
100400-01
The following procedure should be used to install the main landing gear (MLG).
Applicable Aircraft Serial Numbers
All
Type of Maintenance
Line
Level of Certification
LSA-RM
Task Specific Training Required
No
Special Tools Required
None
Parts Required
ICA007426 (MAIN LANDING GEAR TRUNNION BUSHINGS)
AN10C20A (BOLT)
AN3C27A (BOLT)
NAS1149C332R (WASHER)
S73HW2-100-100 (RETAINING RING)
MS35489-35 (RUBBER GROMMETS)
Aircraft System and Number
11—Landing Gear
Safety Equipment
As Needed
Consumables
Tef-Gel®
The procedure below installs both left and right MLG assemblies. If only installing one side, perform only those steps needed.
CAUTION: 
Whenever standing, sitting, or kneeling inside the fuselage with floor panels removed, suitable padding must be employed so as to avoid damage to the bottom of the hull. Sandwich panels and other structure and systems can be easily damaged by concentrated applied loads.
Task Instructions
1. Position the right MLG assembly under the right Seawings™.
2. Feed the brake line through the right hole in the forward main bulkhead.
3. Use two people, one inside the aircraft and one outside, to feed the right MLG subassembly through the opening in the bottom of the right Seawings™ and into position between the main bulkheads. This assembly should be complete with bellcrank, actuator, pushrod, trunnion, leg, and boot.
4. Ensure that the ICA007426 MLG trunnion pivot bushings are in good condition and install one in each of the sleeve bearings in the main bulkhead at the trunnion pivot.
5. Coat two AN10C20A bolts with Tef-Gel® and, supporting the weight of the right gear leg, install them with their nuts and washers, through the ICA007426 bushings and into the right MLG trunnion, securing it to the bulkhead pivot points. The bolt heads should face away from the trunnion. Use 15/16 wrenches to torque each fastener to 900±100 in-lbf.
6. Align the MLG bellcrank to the pivot bores in the main back bulkheads and slide the MLG bellcrank shaft into place from the back forward.
7. Install the SH200-SS retaining clip into the groove on the bellrank shaft.
8. Apply Tef-Gel® to the AN3C27A bolt and install through the bellcrank and shaft with a NAS1149C0332R washer under its head. Torque to 20 in-lbf.
9. Position the left MLG assembly under the left Seawings™.
10. Feed the brake line through the left hole in the forward main bulkhead.
11. Feed the left MLG subassembly through the opening in the bottom of the right Seawings™ and into position between the main bulkheads. This assembly should be complete with leg, boot, trunnion, and pushrod.
12. Ensure that the ICA007426 MLG trunnion pivot bushings are in good condition and install one in each of the sleeve bearings in the main bulkheads at the trunnion pivot.
13. Coat two AN10C20A bolts with Tef-Gel® and, supporting the weight of the left gear leg, install them with their nuts and washers, through the ICA007426 bushings and into the left MLG trunnion, securing it to the bulkhead pivot points. The bolt heads should face away from the trunnion. Use 15/16 wrenches to torque each fastener to 900±100 in-lbf.
14. Supporting the weight of the left gear leg, align the left MLG pushrod to the MLG bellcrank and install the wrist pin, sliding it in from the back forward.
15. Install the S73HW2-100-100 retaining ring into the groove on the wrist pin.
16. Connect the MLG actuator electrical connector to the aircraft harness.
17. Route the left and right brake lines forward to the parking brake valve. Reinstall any cable ties that were removed and install the MS35489-35 rubber grommets at the forward main bulkhead interface.
18. Remove any caps from the brake lines and parking valve then, using a 7/16 wrench to hold the aft union fittings at the valve and a 1/2 wrench to connect the left and right brake lines to the aft side of the valve, torque each B-nut to 30-40 in-lbf.
19. Check and adjust the MLG actuator stops using the rigging procedure. (Main Landing Gear (MLG) Rigging and Rigging Check with Landing Gear Up Main Landing Gear (MLG) Rigging and Rigging Check with Landing Gear Down) The boots are not yet bonded, so ensure that they do not interfere with gear operation.
20. Once the landing gear is operating properly, bond the MLG boots in place. (Main Landing Gear (MLG) Boot Installation)
21. Install the seat backs and baggage floors. (Install Seat Back)(Baggage Floor Installation)
22. Check the MLG bay for tools or anything else amiss, then install the aft bulkhead baggage panel. (Baggage Sidewall Panel Installation)
23. Lower the aircraft off of the jacks.
Verification Method
The main landing gear actuator should fall within the range specified in the rigging procedure. (Check Landing Gear Extended Position Check Landing Gear Retracted Position)