Product Details
Torque Link Stop Lugs and Safety Plate
This often overlooked but important part is affordable at McFarlane!
The torque link stop lug is a sacrificial part that hammers against a flat spot on the lower part of the shock strut outer tube when the strut extends after takeoff. This prevents the strut from overextending and forces the nose wheel and rudder system into proper alignment for flight.
Due to repeated hammering with every takeoff, these stop lugs must be periodically replaced. Excessive wear can allow overextension of the strut. They also often wear unevenly resulting in inconsistent alignment of the nose wheel in flight which then causes extra drag and yaw. The extra yaw can require increased rudder trim which causes even more drag. So yes, replacing a torque link stop lug can reduce drag!
- Safety plate features bend up tabs to secure stop lug bolts
- Super tough 4130 alloy steel for corrosion resistance
- Kits include stop lug, safety plate and applicable 3/16″ bolts
More important than you think
Overextension of the nose strut due to a worn out stop lug can lead to a cascade of problems. McFarlane A&P mechanics have seen struts over extend to the point where the metering pin comes out of the orifice. This results in loss of dampening action and the pin hammering the orifice every landing, and distorting and enlarging it. Over time, the excess nose strut travel and lack of dampening can result in fatigue cracks in the torque link arms. McFarlane recommends thoroughly inspecting all nose strut components when replacing a severely worn stop lug.
Other nose wheel steering parts:
- Steering rods
- Steering rod boots
- Shimmy dampener seal kits
- Torque link repair kits
- Nose strut seal kits
Maintenance Tip:
Replace the stop lug if it is no longer flush with the strut, mushroomed, worn, rounded, bent away from the torque link, or if it has stress cracks. The safety plate should not be reused.
Eligible Aircraft
| Make | Model | Start S/N | End S/N | Qty/Aircraft | Location | Comment | Eligibility Chart |
|---|---|---|---|---|---|---|---|
| Cessna | 150D | 15060477 | 15060772 | 1 | Nose Gear Strut | When Equipped with Heavy Duty Nose Gear | 6729 |
| Cessna | 150E | 15060773 | 15061532 | 1 | Nose Gear Strut | When Equipped with Heavy Duty Nose Gear | 6729 |
| Cessna | 150F | 15061533 | 15063457 | 1 | Nose Gear Strut | When Equipped with Heavy Duty Nose Gear | 6729 |
| Cessna | 150G | 15064533 | 15067198 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 150H | 15067199 | 15069308 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 150J | 15069309 | 15071128 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 150K | 15071129 | 15072003 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 150L | 15072004 | 15075781 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 150M | 15075782 | 15079405 | 1 | Nose Gear Strut | 6729 | |
| Cessna | A150K | A1500001 | A1500226 | 1 | Nose Gear Strut | 6729 | |
| Cessna | A150L | A1500227 | A1500523 | 1 | Nose Gear Strut | 6729 | |
| Cessna | A150M | A1500524 | A1500734 | 1 | Nose Gear Strut | 6729 | |
| Cessna | F150F | F150-0001 | F150-0055 | 1 | Nose Gear Strut | 6729 | |
| Cessna | F150G | F150-0068 | F150-0219 | 1 | Nose Gear Strut | 6729 | |
| Cessna | F150H | F150-0220 | F150-0389 | 1 | Nose Gear Strut | 6729 | |
| Cessna | F150J | F150-0390 | F150-0529 | 1 | Nose Gear Strut | 6729 | |
| Cessna | F150K | F15000530 | F15000658 | 1 | Nose Gear Strut | 6729 | |
| Cessna | F150L | F15000659 | F15001143 | 1 | Nose Gear Strut | 6729 | |
| Cessna | F150M | F15001144 | F15001428 | 1 | Nose Gear Strut | 6729 | |
| Cessna | FA150K | FA1500001 | FA1500081 | 1 | Nose Gear Strut | 6729 | |
| Cessna | FA150L | FA1500082 | FA1500120 | 1 | Nose Gear Strut | 6729 | |
| Cessna | FA150L (when equipped w/FKA150-2311 & FKA150-2316) | FA1500121 | FA1500261 | 1 | Nose Gear Strut | 6729 | |
| Cessna | FA150M (when equipped w/FKA150-2311 & FKA150-2316) | FA1500262 | FA1500336 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 152 | 15279406 | 15286033 | 1 | Nose Gear Strut | 6729 | |
| Cessna | A152 | A1520735 | A1521049 | 1 | Nose Gear Strut | 6729 | |
| Cessna | F152 | F15201429 | F15201980 | 1 | Nose Gear Strut | 6729 | |
| Cessna | FA152 | FA1520337 | FA1520425 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 172H (T-41A) | 17254893 | 17256512 | 1 | Nose Gear Strut | When equipped with Heavy Duty Nose Gear | 6729 |
| Cessna | 172H (T-41A) | 17254893 | 17256512 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 172I | 17256513 | 17257161 | 1 | Nose Gear Strut | When equipped with Heavy Duty Nose Gear | 6729 |
| Cessna | 172I | 17256513 | 17257161 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 172K | 17257162 | 17259223 | 1 | Nose Gear Strut | When equipped with Heavy Duty Nose Gear | 6729 |
| Cessna | 172K | 17257162 | 17259223 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 172L | 17259224 | 17260758 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 172L | 17259224 | 17260758 | 1 | Nose Gear Strut | When equipped with Heavy Duty Nose Gear | 6729 |
| Cessna | 172M | 17260759 | 17263458 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 172M | 17260759 | 17263458 | 1 | Nose Gear Strut | When equipped with Heavy Duty Nose Gear | 6729 |
| Cessna | 172M | 17263459 | 17267584 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 172N | 17267585 | 17274009 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 172P | 17274010 | 17276654 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 172Q | 17275869 | 17276211 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 172R | 17280001 | 17281221 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 172R | 17281222 | 17299999 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 172S | 172S8001 | 172S9657 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 172S | 172S9658 | 172S99999 | 1 | Nose Gear Strut | 6729 | |
| Cessna | F172H | F17200655 | F17200754 | 1 | Nose Gear Strut | 6729 | |
| Cessna | F172H | F17200655 | F17200754 | 1 | Nose Gear Strut | When equipped with Heavy Duty Nose Gear | 6729 |
| Cessna | F172H | F172-0320 | F172-0654 | 1 | Nose Gear Strut | 6729 | |
| Cessna | F172H | F172-0320 | F172-0654 | 1 | Nose Gear Strut | When equipped with Heavy Duty Nose Gear | 6729 |
| Cessna | F172K | F17200755 | F17200804 | 1 | Nose Gear Strut | When equipped with Heavy Duty Nose Gear | 6729 |
| Cessna | F172K | F17200755 | F17200804 | 1 | Nose Gear Strut | 6729 | |
| Cessna | F172L | F17200805 | F17200904 | 1 | Nose Gear Strut | When equipped with Heavy Duty Nose Gear | 6729 |
| Cessna | F172L | F17200805 | F17200904 | 1 | Nose Gear Strut | 6729 | |
| Cessna | F172M | F17200905 | F17201234 | 1 | Nose Gear Strut | 6729 | |
| Cessna | F172M | F17200905 | F17201234 | 1 | Nose Gear Strut | When equipped with Heavy Duty Nose Gear | 6729 |
| Cessna | F172M | F17201235 | F17201514 | 1 | Nose Gear Strut | 6729 | |
| Cessna | F172N | F17201515 | F17202039 | 1 | Nose Gear Strut | 6729 | |
| Cessna | F172P | F17202040 | F17202254 | 1 | Nose Gear Strut | 6729 | |
| Cessna | FR172E | FR17200001 | FR17200060 | 1 | Nose Gear Strut | ||
| Cessna | FR172E | FR17200001 | FR17200060 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | FR172E | FR17200001 | FR17200060 | 1 | Nose Gear Strut | 6729 | |
| Cessna | FR172F | FR17200061 | FR17200145 | 1 | Nose Gear Strut | ||
| Cessna | FR172F | FR17200061 | FR17200145 | 1 | Nose Gear Strut | 6729 | |
| Cessna | FR172F | FR17200061 | FR17200145 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | FR172G | FR17200146 | FR17200225 | 1 | Nose Gear Strut | ||
| Cessna | FR172G | FR17200146 | FR17200225 | 1 | Nose Gear Strut | 6729 | |
| Cessna | FR172G | FR17200146 | FR17200225 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | FR172H | FR17200226 | FR17200350 | 1 | Nose Gear Strut | 6729 | |
| Cessna | FR172H | FR17200226 | FR17200350 | 1 | Nose Gear Strut | ||
| Cessna | FR172J | FR17200351 | FR17200590 | 1 | Nose Gear Strut | ||
| Cessna | FR172J | FR17200351 | FR17200590 | 1 | Nose Gear Strut | 6729 | |
| Cessna | FR172K | FR17200591 | FR17200675 | 1 | Nose Gear Strut | 6729 | |
| Cessna | R172E (T-41B,C,D) | R172-0001 | R1720335 | 1 | Nose Gear Strut | 6729 | |
| Cessna | R172F (T-41D) | R172-0336 | R172-0409 | 1 | Nose Gear Strut | 6729 | |
| Cessna | R172G (T-41C,D) | R1720410 | R1720444 | 1 | Nose Gear Strut | 6729 | |
| Cessna | R172H (T-41D) | R1720445 | R1720620 | 1 | Nose Gear Strut | 6729 | |
| Cessna | R172K | R1722000 | R1723454 | 1 | Nose Gear Strut | 6729 | |
| Cessna | 182K | 18257626 | 18258505 | 1 | Nose Gear Strut | When Equipped with Heavy Duty Gear | 6729 |
| Cessna | 182L | 18258506 | 18259305 | 1 | Nose Gear Strut | When Equipped with Heavy Duty Gear | 6729 |
| Cessna | 182M | 18259306 | 18260055 | 1 | Nose Gear Strut | When Equipped with Heavy Duty Gear | 6729 |
| Cessna | 182N | 18260056 | 18260825 | 1 | Nose Gear Strut | When Equipped with Heavy Duty Gear | 6729 |
| Cessna | P206B | P206-0307 | P206-0419 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | P206C | P206-0420 | P206-0519 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | P206D | P206-0520 | P206-0603 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | P206E | P20600604 | P20600647 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | TP206B | P206-0307 | P206-0419 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | TP206C | P206-0420 | P206-0519 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | TP206D | P206-0520 | P206-0603 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | TP206E | P20600604 | P20600647 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | TU206B | U206-0657 | U206-0914 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | TU206C | U206-0915 | U206-1234 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | TU206D | U206-1235 | U206-1444 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | TU206E | U20601445 | U20601700 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | TU206F | U20601701 | U20602199 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | U206B | U206-0657 | U206-0914 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | U206C | U206-0915 | U206-1234 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | U206D | U206-1235 | U206-1444 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | U206E | U20601445 | U20601700 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
| Cessna | U206F | U20601701 | U20602199 | 1 | Nose Gear Strut | When equipped with heavy landing gear | 6729 |
Part Number Information
Supersedes Part Numbers
0442506-5 (Textron, Inc.) | 0442506-8 (Textron, Inc.)
Cross-reference information
Cross Reference Reference only: Please verify the product is eligible for your aircraft before adding to your cart. OEM Part Number McFarlane Part Number Comment 0442506-5 MC0442506-8 0442506-8 MC0442506-8
Additional product information
Approval: FAA PMA SupersedesPartNumber: 0442506-5 (Manufacturer: Textron, Inc.) SupersedesPartNumber: 0442506-8 (Manufacturer: Textron, Inc.)
Frequently Asked Questions
What does the Torque Link Stop Lug do?
The torque link stop lugs are more important than you would think. Overextension of the nose strut due to a worn out stop lug can lead to a cascade of problems. McFarlane A&P mechanics have seen struts over extend to the point where the metering pin comes out of the orifice. This results in loss of damping action and the pin hammering the orifice every landing and distorting and enlarging it. Over time, the excess nose strut travel and lack of damping can result in fatigue cracks in the torque link arms. McFarlane recommends thoroughly inspecting all nose strut components when replacing a severely worn stop lug. The stop lug also acts as a centering device aligning the nose wheel and wheel pant straight with the airplane and slip stream after it has left the runway. Worn stop lugs can allow the nose wheel to lock in a turned position in flight that will require holding rudder for coordinated flight. Retractable gear aircraft depend on the stop lug to properly center the nose gear steering before it retracts into the wheel well.
