System Two
No failure report names the system two. 317 FAA approvals let 1 company make a replacement system two, S-Tec Corporation holding the most (317).
Approved replacement parts 317 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a system two and sell it as an approved part for the models named. These are the companies holding such approvals for a system two:
For these models most: Cessna 172 Skyhawk (15), Piper PA-28 Cherokee, Warrior, Archer and Arrow (13), Mooney M-20 (11), Cessna 210 Centurion (11), Piper PA-60 Aerostar (9), Cessna U206 Stationair (9), Beechcraft A36 Bonanza (9), Cessna 207 Skywagon 207 (8), Cessna 177 Cardinal (8), Piper PA-34 Seneca (7), Piper PA-23 Apache and Aztec (7), Cessna T210 Turbo Centurion (7).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| S-Tec Corporation | System 55X Two Axis Automatic Flight Control Systems ST-945-MDL-0001 | Modification Part | The WACO Aircraft Company YMF (WACO F5C) | 2012-12-02 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-265 | Modification Part | Piper Aircraft, Inc. PA-23-250 and PA-E23-250 | 2012-08-29 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-237 | Modification Part | Cessna Aircraft Company 421B | 2012-08-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-665 | Modification Part | Cal Pacific Airmotive, Inc. P-51D (USAF F-51D) and P-51K (USAF F-51K) | 2012-08-29 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-064 | Modification Part | Hawker Beechcraft Corporation C23 | 2012-08-19 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-278 | Modification Part | True Flight Holdings LLC AA-5A and AA-5B | 2012-08-19 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-095 | Modification Part | Cessna Aircraft Company CESSNA FR172E, CESSNA FR172F, CESSNA FR172G | 2012-08-19 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-095 | Modification Part | Cessna Aircraft Company R172E, R172F, R172G | 2012-08-19 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-291 | Modification Part | Cessna Aircraft Company 182H, 182J, 182K | 2012-08-19 | current |
| S-Tec Corporation | System 50 Two Axis Automatic Flight Guidance System ST-280 | Modification Part | True Flight Holdings LLC AA-5A and AA-5B | 2012-08-19 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-021 | Modification Part | Piper Aircraft, Inc. PA-24-260 and PA-24-400 | 2012-06-28 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-226 | Modification Part | Cessna Aircraft Company T210G, T210H, and T210J | 2012-06-28 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-151 | Modification Part | Alexandria Aircraft, LLC. 17-30, 17-31, and 17-31TC | 2012-06-28 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-027 | Modification Part | Cessna Aircraft Company 210N and T210N | 2012-06-28 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-344 | Modification Part | Cessna Aircraft Company 402C | 2012-06-28 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-034 | Modification Part | Cessna Aircraft Company T210K | 2012-06-28 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-295 | Modification Part | Cessna Aircraft Company P210N | 2012-06-28 | current |
| S-Tec Corporation | System 55X Two Axis Automatic Flight Guidance System ST-662-1 | Modification Part | Piper Aircraft, Inc. PA-23-250, S/N 27-7654001 through... | 2012-06-28 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-343 | Modification Part | Cessna Aircraft Company P206C, TP206C, U206C | 2012-06-28 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-007 | Modification Part | Hawker Beechcraft Corporation S35, V35, V35A | 2012-06-28 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-284 | Modification Part | Hawker Beechcraft Corporation B95A, D95A, and E95 | 2012-06-28 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-199 | Modification Part | Cessna Aircraft Company 310I, 310J, E310J | 2012-06-28 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-024 | Modification Part | Cessna Aircraft Company 180G, 180H, 180J | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-019 | Modification Part | Cessna Aircraft Company CESSNA F172M and CESSNA F172N | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-226 | Modification Part | Cessna Aircraft Company 210G, 210H, and 210J | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-024 | Modification Part | Cessna Aircraft Company 185, 185A, 185B | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-016 | Modification Part | Cessna Aircraft Company 182Q and 182R | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-029 | Modification Part | Cessna Aircraft Company A185F | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-025 | Modification Part | Cessna Aircraft Company R172K | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-011 | Modification Part | Cessna Aircraft Company 182P and 182Q | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-086 | Modification Part | Piper Aircraft, Inc. PA-28-201T | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-015 | Modification Part | Mooney Aviation Company, Inc. M20F, M20G, and M20J | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-162 | Modification Part | Piper Aircraft, Inc. PA-32-260, PA-32-300, and PA-32R-300 | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-029 | Modification Part | Cessna Aircraft Company 180K | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-014 | Modification Part | Hawker Beechcraft Corporation 36, A36, and F33A | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-016 | Modification Part | Cessna Aircraft Company F182Q | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-011 | Modification Part | Cessna Aircraft Company Cessna F182P and Cessna F182Q | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-025 | Modification Part | Cessna Aircraft Company 172Q | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-019 | Modification Part | Cessna Aircraft Company R172J and R172K | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-025 | Modification Part | Cessna Aircraft Company Cessna FR172K | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-114 | Modification Part | Mooney Aviation Company, Inc. M20K | 2012-05-20 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-019 | Modification Part | Cessna Aircraft Company Cessna FR172J and Cessna FR172K | 2012-05-20 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-383 | Modification Part | Mooney Aviation Company, Inc. M20F, M20G, and M20J | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-409 | Modification Part | Cessna Aircraft Company U206G and TU206G | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-403 | Modification Part | Hawker Beechcraft Corporation B90 and C90 | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-377 | Modification Part | Cessna Aircraft Company 210N and T210N | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-372 | Modification Part | Hawker Beechcraft Corporation 95-55, 95-A55, 95-B55 | 2012-01-29 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-070 | Modification Part | Cessna Aircraft Company 207, T207, 207A | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-384 | Modification Part | Mooney Aviation Company, Inc. M20K | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-392 | Modification Part | Hawker Beechcraft Corporation V35B | 2012-01-29 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-067 | Modification Part | Cessna Aircraft Company 207A and T207A | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-395 | Modification Part | Cessna Aircraft Company 207A and T207A | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-405 | Modification Part | Cessna Aircraft Company 335, 340, and 340A | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-393 | Modification Part | Hawker Beechcraft Corporation 95, B95, B95A | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-375 | Modification Part | Cessna Aircraft Company 182Q, 182R, and T182 | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-403 | Modification Part | Hawker Beechcraft Corporation 65-90 and 65-A90 | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-394 | Modification Part | Cessna Aircraft Company P206C, TP206C, U206C | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-382 | Modification Part | Cessna Aircraft Company 210G, T210G, 210H | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-387 | Modification Part | Hawker Beechcraft Corporation 35-33, 35-A33, 35-B33 | 2012-01-29 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-010 | Modification Part | Hawker Beechcraft Corporation H35, J35, K35 | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-373 | Modification Part | Hawker Beechcraft Corporation 76 | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-374 | Modification Part | Cessna Aircraft Company 182P and 182Q | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-374 | Modification Part | Cessna Aircraft Company Cessna F182P and Cessna F182Q | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-389 | Modification Part | Hawker Beechcraft Corporation 36, A36, and F33A | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-381 | Modification Part | True Flight Holdings LLC. AA-5A and AA-5B | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-375 | Modification Part | Cessna Aircraft Company Cessna F182Q | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-311 | Modification Part | Aerostar Aircraft Corporation PA-60-600 | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-396 | Modification Part | Cessna Aircraft Company 207, T207, 207A | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-412 | Modification Part | Cessna Aircraft Company 310I, 310J, E310J | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-378 | Modification Part | Cessna Aircraft Company P210N | 2012-01-29 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-074 | Modification Part | Hawker Beechcraft Corporation 76 | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-390 | Modification Part | Hawker Beechcraft Corporation C35, D35, E35 | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-346 | Modification Part | Cessna Aircraft Company 402C | 2012-01-29 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-110 | Modification Part | Piper Aircraft, Inc. PA-28-235 | 2012-01-29 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-017 | Modification Part | Hawker Beechcraft Corporation V35B | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-420 | Modification Part | CPAC, Inc. 112, 112B, 114 | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-367 | Modification Part | Hawker Beechcraft Corporation 58 and 58A | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-376 | Modification Part | Cessna Aircraft Company R182 and TR182 | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-414 | Modification Part | Piper Aircraft, Inc. PA-30 and PA39 | 2012-01-29 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-046 | Modification Part | Cessna Aircraft Company 172RG | 2012-01-29 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-230 | Modification Part | Helio Aircraft, LLC H-250, H-295, H-700 | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-412 | Modification Part | Cessna Aircraft Company 310R | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-379 | Modification Part | Cessna Aircraft Company 421B | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-391 | Modification Part | Hawker Beechcraft Corporation H35, J35, K35 | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-421 | Modification Part | Piper Aircraft, Inc. PA-34-200T and PA-34-220T | 2012-01-29 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-378 | Modification Part | Cessna Aircraft Company P210R | 2011-08-10 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-295 | Modification Part | Cessna Aircraft Company P210R | 2011-08-10 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-397 | Modification Part | Cessna Aircraft Company 421C | 2011-08-10 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-398 | Modification Part | Cessna Aircraft Company 421C | 2011-08-10 | current |
| S-Tec Corporation | System 55 Two Axis Automatic Flight Guidance System ST-664 | Modification Part | Revo, Incorporated Lake Model 250 | 2011-08-10 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-397 | Modification Part | Cessna Aircraft Company 414A | 2011-08-09 | current |
| S-Tec Corporation | System 65Two Axis Automatic Flight Guidance System ST-574 | Modification Part | Piper Aircraft, Inc. PA-31T | 2011-08-09 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-344 | Modification Part | Cessna Aircraft Company 402A and 402B | 2011-08-09 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-403 | Modification Part | Hawker Beechcraft Corporation E90 | 2011-08-09 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-470 | Modification Part | Cessna Aircraft Company 172M, 172N, 172P | 2011-08-09 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-379 | Modification Part | Cessna Aircraft Company 421 and 421A | 2011-08-09 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-143 | Modification Part | CPAC, Inc. 112TC | 2011-08-09 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-350 | Modification Part | SOCATA TB 10, TB 20, and TB 21 | 2011-08-09 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-199 | Modification Part | Cessna Aircraft Company 320B, 320C, 320D | 2011-08-09 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-346 | Modification Part | Cessna Aircraft Company 402A and 402B | 2011-08-09 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-465 | Modification Part | Hawker Beechcraft Corporation D50, D50A, D50B | 2011-08-09 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-470 | Modification Part | Cessna Aircraft Company R172K | 2011-08-09 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-412 | Modification Part | Cessna Aircraft Company 320B, 320C, 320D | 2011-08-09 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-426 | Modification Part | SOCATA TB 20 and TB 21 | 2011-08-09 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-347 | Modification Part | Viking Air Limited DHC-6-100 and DHC-6-200 | 2011-08-09 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-332 | Modification Part | Piper Aircraft, Inc. PA-23-235 | 2011-08-09 | current |
| S-Tec Corporation | System 55 Two Axis Automatic Flight Guidance System ST-585 | Modification Part | Vulcanair S.p.A. P68B, P68C-TC, P68 | 2011-08-09 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-398 | Modification Part | Cessna Aircraft Company 414A | 2011-08-09 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-470 | Modification Part | Cessna Aircraft Company CESSNA F172M and CESSNA F172N | 2011-08-09 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-472 | Modification Part | Viking Air Limited DHC-6-100 and DHC-6-200 | 2011-08-09 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-237 | Modification Part | Cessna Aircraft Company 421 and 421A | 2011-08-09 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-423 | Modification Part | Hawker Beechcraft Corporation 60, A60, and B60 | 2011-08-09 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-416 | Modification Part | Maule Aerospace... MX-7-180 | 2011-08-09 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-305 | Modification Part | Piper Aircraft, Inc. PA-28-235 | 2011-08-09 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-089 | Modification Part | Piper Aircraft, Inc. PA-28RT-201 and PA-28RT-201T | 2011-08-09 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-470 | Modification Part | Cessna Aircraft Company Cessna FR172K | 2011-08-09 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-590 | Modification Part | Twin Commander Aircraft LLC 690, 690A, and 690B | 2010-11-29 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-082 | Modification Part | Hawker Beechcraft Corporation 56TC and A56TC | 2010-11-29 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-032 | Modification Part | Piper Aircraft, Inc. PA-34-200 | 2010-11-29 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-512 | Modification Part | Hawker Beechcraft Corporation G17S | 2010-11-28 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-082 | Modification Part | Hawker Beechcraft Corporation 95-B55B | 2010-11-28 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-512 | Modification Part | Hawker Beechcraft Corporation D17R (UC-43A) | 2010-11-28 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-495 | Modification Part | Maule Aerospace... MT-7-235 | 2010-11-28 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-512 | Modification Part | Hawker Beechcraft Corporation D17S (UC-43, UC-43B, GB-1 | 2010-11-28 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-533 | Modification Part | Piper Aircraft, Inc. PA-23-235 and PA-23-250 | 2010-07-19 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-535 | Modification Part | Hawker Beechcraft Corporation G17S | 2010-07-19 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-532 | Modification Part | Piper Aircraft, Inc. PA-28-161, PA-28-181, PA-28-201T | 2010-07-19 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-540 | Modification Part | Cessna Aircraft Company 310D, 310E, 310F | 2010-07-19 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-535 | Modification Part | Hawker Beechcraft Corporation D17R (UC-43A) | 2010-07-19 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-528 | Modification Part | Twin Commander Aircraft LLC 680E | 2010-07-19 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-421 | Modification Part | Piper Aircraft, Inc. PA-34-200 | 2010-07-19 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-535 | Modification Part | Hawker Beechcraft Corporation D17S (UC-43, UC-43B, GB-1 | 2010-07-19 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-025 | Modification Part | Cessna Aircraft Company CESSNA F172P | 2010-07-18 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-467 | Modification Part | Piper Aircraft, Inc. PA-31-325 | 2010-06-22 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-528 | Modification Part | Twin Commander Aircraft LLC 560-A and 560-E | 2010-06-22 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-377 | Modification Part | Cessna Aircraft Company 210R and T210R | 2010-06-22 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-350 | Modification Part | SOCATA - Groupe AEROSPAT-IALE TB 9 | 2010-06-22 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-143 | Modification Part | CPAC, Inc. 112 | 2010-04-05 | current |
| S-Tec Corporation | System 55 Two Axis Automatic Flight Guidance System ST-606 | Modification Part | Aerostar Aircraft Corporation PA-60-601 (Aerostar 601), PA-60-601P... | 2010-04-05 | current |
| S-Tec Corporation | System 55 Two Axis Automatic Flight Guidance System ST-878 | Modification Part | Cessna Aircraft Company 177RG | 2010-04-05 | current |
| S-Tec Corporation | System 55 Two Axis Automatic Flight Guidance System ST-878 | Modification Part | Cessna Aircraft Company 177B | 2010-04-05 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-312 | Modification Part | Aerostar Aircraft Corporation PA-60-601 (Aerostar 601), PA-60-601P... | 2010-04-05 | current |
| S-Tec Corporation | System 55 Two Axis Automatic Flight Guidance System ST-878 | Modification Part | Cessna Aircraft Company F177RG | 2010-04-05 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System with Autotrim ST-311 | Modification Part | Aerostar Aircraft Corporation PA-60-601 (Aerostar 601), PA-60-601P... | 2010-04-05 | current |
| S-Tec Corporation | System 65 Two Axis Automatic Flight Guidance System ST-665 | Modification Part | Cal Pacific Airmotive, Inc. P-51D (F-51D) and P-51K (F-51K) | 2010-04-04 | current |
| S-Tec Corporation | System 55X Two Axis, System 20/30 Single and Two Axis... ST-873 | Modification Part | Maule Aerospace... MX-7-160, MX-7-160C, MX-7-180A | 2010-03-21 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-199 | Modification Part | Cessna Aircraft Company 320, 320-1, and 320A | 2010-03-21 | current |
| S-Tec Corporation | System 55X Two Axis Automatic Flight Guidance System ST-890 | Modification Part | Maule Aerospace... M-7-420AC | 2010-01-25 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-143 | Modification Part | CPAC, Inc. 112B, 114, and 114A | 2010-01-25 | current |
| S-Tec Corporation | System 60 Two Axis Automatic Flight Guidance System ST-095 | Modification Part | Cessna Aircraft Company 172D, 172E, 172F | 2010-01-25 | current |
The first 150 of 317.
Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.