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Part # ABI-PA18-1
PA-18 THREE LEAF TAILSPRING, 1 BOLT
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Product Details
Specifications
- Approval
- FAA PMA, FAA PMA STC
- Condition
- New
- Manufacturer
- Alaska Bushwheels, Inc.
- Dimensions
- N/A
- Weight
- 7 lbs
- Unit of Measure
- Each
- McFarlane Part Number
- ABI-PA18-1
Product Description
ABI Piper PA-18 Three Leaf Tailspring
Three-leaf Steel Tailspring For Piper PA-18 Super Cub
The ABI-PA18-1 and ABI-PA18-2 tailsprings reliably absorb and dissipate landing energy to minimize bounce.
At 5.6 lbs, it balances durability with weight efficiency. A dependable, cost-effective tailwheel solution for certified PA-18 aircraft.
- Three-leaf steel construction
- Weight: 5.6 lbs
- Drop test rating: 5.7 G
- Available as 1-bolt or 2-bolt configurations
- FAA STC approved (paperwork only: SA02574AK )
- Compatible with Piper PA-18 Super Cub
Options:
- 1-bolt: ABI-PA18-1
- 2-bolt: ABI-PA18-2
WARNING: Cancer and/or Reproductive Harm - California Proposition 65 Resources
Eligible Aircraft
| Make | Model | Start S/N | End S/N | Eligibility Chart |
|---|---|---|---|---|
| Piper PA-18 | PA-18 | S/N 18-1 – 18-7632 | 18-7632 | Eligibility Chart 7842 |
| Piper PA-18-105 (Special) | PA-18-105 (Special) | S/N 18-1 – 18-7632 | 18-7632 | Eligibility Chart 7842 |
| Piper PA-18-125 (Army L-21A) | PA-18-125 (Army L-21A) | S/N 18-1 – 18-7632 | 18-7632 | Eligibility Chart 7842 |
| Piper PA-18-135 (Army L-21B) | PA-18-135 (Army L-21B) | S/N 18-1 – 18-7632 | 18-7632 | Eligibility Chart 7842 |
| Piper PA-18-150 | PA-18-150 | S/N 1809001 – 1809113 | 1809113 | Eligibility Chart 7842 |
| Piper PA-18-150 | PA-18-150 | S/N 18-3771 – 18-8309025 | 18-8309025 | Eligibility Chart 7842 |
| Piper PA-18A | PA-18A | S/N 18-1 – 18-7632 | 18-7632 | Eligibility Chart 7842 |
| Piper PA-18A-135 | PA-18A-135 | S/N 18-1 – 18-7632 | 18-7632 | Eligibility Chart 7842 |
| Piper PA-18A-150 | PA-18A-150 | S/N 18-3771 – 18-8309025 | 18-8309025 | Eligibility Chart 7842 |
| Piper PA-18AS-125 | PA-18AS-125 | S/N 18-1 – 18-7632 | 18-7632 | Eligibility Chart 7842 |
| Piper PA-18AS-135 | PA-18AS-135 | S/N 18-1 – 18-7632 | 18-7632 | Eligibility Chart 7842 |
| Piper PA-18AS-150 | PA-18AS-150 | S/N 18-3771 – 18-8309025 | 18-8309025 | Eligibility Chart 7842 |
| Piper PA-18S | PA-18S | S/N 18-1 – 18-7632 | 18-7632 | Eligibility Chart 7842 |
| Piper PA-18S-105 (Special) | PA-18S-105 (Special) | S/N 18-1 – 18-7632 | 18-7632 | Eligibility Chart 7842 |
| Piper PA-18S-125 | PA-18S-125 | S/N 18-1 – 18-7632 | 18-7632 | Eligibility Chart 7842 |
| Piper PA-18S-135 | PA-18S-135 | S/N 18-1 – 18-7632 | 18-7632 | Eligibility Chart 7842 |
| Piper PA-18S-150 | PA-18S-150 | S/N 1809001 – 1809113 | 1809113 | Eligibility Chart 7842 |
| Piper PA-18S-150 | PA-18S-150 | S/N 18-3771 – 18-8309025 | 18-8309025 | Eligibility Chart 7842 |
| Piper PA-19 (Army L-18C) | PA-19 (Army L-18C) | S/N 19-1 – 19-3 | 19-3 | Eligibility Chart 7842 |
| Piper PA-19S | PA-19S | S/N 19-1 – 19-3 | 19-3 | Eligibility Chart 7842 |
FAQs
What aircraft is the ABI PA-18 three-leaf steel tailspring compatible with?
The ABI-PA18-1 and ABI-PA18-2 tailsprings are designed for certified Piper PA-18 Super Cub aircraft. The installation is FAA STC approved under SA02573AK.
What is the difference between ABI-PA18-1 and ABI-PA18-2?
ABI-PA18-1 is the 1-bolt configuration and ABI-PA18-2 is the 2-bolt configuration. Both are three-leaf steel tailsprings with identical performance specs. Choose based on your airframe's tailwheel attachment configuration.
What does the ABI three-leaf steel tailspring weigh?
The ABI-PA18-1 and ABI-PA18-2 tailsprings weigh 5.6 lbs each.
What is the drop test rating for the ABI PA-18 steel tailspring?
The ABI-PA18-1 and ABI-PA18-2 are drop-test rated to 5.7 G.
Does the ABI PA-18 steel tailspring require STC documentation?
Yes, for certified aircraft. The STC is SA02573AK. STC paperwork is available separately under part number SA02573AK if you already have the spring installed and only need the documentation.
How does the steel tailspring compare to the titanium tailspring for the PA-18?
Both replace the OEM tailspring and absorb landing energy, but the titanium version (ABI-51599 series) is significantly lighter and offers superior shock absorption and elasticity. The steel spring (ABI-PA18-1/2) is the more cost-effective option. The T3 dual shock system (ABI-51343) provides the highest energy absorption and rebound control for heavy use or backcountry operations.
