PowerPac Spoilers Technical Data


Below is a comprehensive list of technical data for PowerPac Spoilers. Please be sure to see our FAQ section to answer any questions you may have.  If you have any further questions, be sure to email them to us or call 253-851-1769.

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Download the ICA Inspection Guide for Piper Aerostar

General Tech Data | STC's | Labor Estimates & Pricing

About Us

Spoilers, Inc. was founded in 1987 by Lawrence S. Shapiro, a United Airlines Boeing 747 Captain who believed that pilots of general aviation high performance piston airplanes should have the same descent control as his jets. No longer would pilots have to juggle power settings to maintain cabin pressurization and adequate cylinder head temperatures while trying to descend for an approach to land. Nor would they have to struggle to reduce airspeed in order to extend the landing gear in an awkward attempt to increase drag and thus the rate of descent.

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Installed Weight
24 VDC
Pump At Maximum Pressure
9.5 AMPS
Control / Circuit Lights
2.0 AMPS
Circuit Breaker
15.0 AMPS
Maximum Working Pressure
950 PSI
Pump Relief Valve Pressure
1150 PSI
Fluid Filter Screen (.0055 SS Wire Cloth)
Cycle Time / Deployment
1/4" O.D
Burst Pressure
17,000 PSI

General Tech Data | STC's | Labor Estimates & Pricing

PowerPac Spoiler STCs...

Following is a list of "PowerPac" Spoiler system STC’s held by Spoilers, Inc.
Kits for these STC's are currently in production and available for shipment.


Date of Drawing Issue


Aircraft Types

SA4913NM* 3-30-90 SP4000

Cessna 402C, 402C R/STOL, 414A, 414A R/STOL, 414AW, 421C, 421CW, 421C R/STOL, 421C w/Turbine engines, 425

SA4937NM* 5-11-90 SP6000 Cessna 421B (Without STOL)

SA4948NM* 6-19-90 SP8000 Cessna 340, 340A (Without STOL)

SA4951NM 6-28-90 SP5000 PA 60-600, 601, 601P, 602P, 700P

SA5114NM* 1-23-91 SP7000 Cessna 337, P337B, T337B, 337C, T337C, 337D, T337D, 337E, T337E, 337F, T337F, 337G, T337G, 337H, P337H, T337H, T337H-SP. All approved with STOL kits from Robertson, Horton, Bush.

SA5196NM* 10-23-91 SP9000 Piper PA-46-310P, PA-46-350P

SA5777NM* 10-5-92 SP10000 Beechcraft 58 Series

SA00007SE* 7-28-93 SP11000 Beechcraft 60, A60, B60 (With and without Boundary Layer Research vortex generator kit STC #SA5761NM) installed)

SA00001SE* 6-9-93 SP12000 Cessna 414 (Without STOL)

SA00215SE* 7-7-95 SP13000 Cessna 310R/T310R (Must be installed only in conjunction with vortex generators manufactured by Micro AeroDynamics STC #SA4980NM or STC #SA5668NM; or by Aeronautical Testing Service, STC #5163NM)
*Uses independent , dedicated hydraulic power pack.


General Tech Data | STC's | Labor Estimates & Pricing

Estimated Installation Labor Time and 2018 Aircraft Owner Net Pricing:

Aircraft Type


2018 Aircraft Owner
Net Pricing
Additional Notes

Cessna 337


$7495 N/A

Cessna 310R,* T310R*


$7495 w/VGs currently installed
* If equipped with aft-mounted air conditioning, add up to 10 hours.

Cessna 310R,* T310R*
40-45 $9495 w/o VGs Currently Installed (includes MicroAerodynamics Vortex Generator Kit)
STC #SA4980NM or STC #SA5668NM
* If equipped with aft-mounted air conditioning, add up to 10 hours.

Cessna 340, 340A
40-45 $7995 N/A

Cessna 402C, 414, 414A, 421B, 421C, 425


$8495 N/A

STOL equipped 414A/421C



Piper Malibu**


$6995 ** If equipped with external radar antenna pod, add 5 hours.

Piper Malibu Mirage**


$6995 ** If equipped with external radar antenna pod, add 5 hours.

Beechcraft Duke


$7495 N/A

Beechcraft Baron 40-45 $7995 N/A



$7995 N/A


General Tech Data | STC's | Labor Estimates & Pricing


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Cessna 310RCessna 337Cessna 340Cessna 400 SeriesBeech BaronBeech DukePiper AerostarPiper Malibu Mirage

Spoilers Inc.
Spoilers Inc.
1202 26th Ave NW, Gig Harbor, WA 98335
Jeff Shapiro, 253-851-1769

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