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FAA-listed STC holder

M-20 Oil Separators LLC STCs

The Jun 30, 2026 FAA DRS snapshot lists 8 selected supplemental type certificates with status Current under M-20 Oil Separators LLC. The records span 236 public aircraft directories and 2 modification categories. This is a research directory, not a claim that any specific kit or service is currently offered.

8
listed Current at snapshot
236
aircraft directories
2
modification categories
Jul 25, 2008
latest recorded revision

Recently revised records

Showing the 8 most recently revised records. Category directories provide the complete paginated discovery path.

8 displayed records.

Search every indexed record for this holder. The table below contains the recently revised records shown on this page.

M-20 Oil Separators LLC supplemental type certificates, aircraft applicability, source status and dates
STC and modificationAircraft / model / TCSource status and datesHolder and authority
SA02033AT (PAGE 1)

Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line.

Engine and powerplantView record
  • Aermacchi SpA F.260TC A10EU
  • Aermacchi SpA F.260BTC A10EU
  • Aermacchi SpA F.260CTC A10EU
  • Aermacchi SpA F.260DTC A10EU
  • Aermacchi SpA F.260ETC A10EU
  • Aermacchi SpA F.260FTC A10EU
  • Aermacchi SpA S.205 - 18/FTC A9EU
  • Aermacchi SpA S.205 - 18/RTC A9EU
  • Aermacchi SpA S.205 - 20/FTC A9EU
  • Aermacchi SpA S.205 - 20/RTC A9EU
  • Aermacchi SpA S.205 - 22/RTC A9EU
  • Aermacchi SpA S.208TC A9EU
  • Aermacchi SpA S.208ATC A9EU
  • Aeronca Aircraft 50-TCTC A-728
  • Aeronca Aircraft 50-TLTC A-728
  • Aeronca Aircraft 65-TAC (Army L-3E)TC A-728
  • Aeronca Aircraft 65-TALTC A-728
  • Aeronca Aircraft 65-TC (Army L-3J)TC A-728
  • Aeronca Aircraft 65-TLTC A-728
  • Aeronca Aircraft YO-58 (Army L-3)TC A-728
  • Aeronca Aircraft O-58A (Army L-3A)TC A-751
  • Aeronca Aircraft O-58B (Army L-3B; L-3C)TC A-751
  • Aeronca Aircraft SO-58BTC A-751
  • Aerostar Aircraft PA-60-600 (Aerostar 600)TC A17WE
  • Aerostar Aircraft PA-60-601 (Aerostar 601)TC A17WE
  • Aerostar Aircraft PA-60-601P (Aerostar 601P)TC A17WE
  • Aerostar Aircraft PA-60-602P (Aerostar 602P)TC A17WE
  • Aerostar Aircraft PA-60-700P (Aerostar 700P)TC A17WE
  • Air Tractor AT-250TC A9SW
  • Air Tractor AT-300TC A9SW
  • Air Tractor AT-301TC A9SW
  • Allied Ag Cat Productions G-164TC 1A16
  • American Champion Aircraft Corp 7ACTC A-759
  • American Champion Aircraft Corp 7ACATC A-759
  • American Champion Aircraft Corp 7BCM (Army L-16A)TC A-759
  • American Champion Aircraft Corp 7CCM (Army L-16B)TC A-759
  • American Champion Aircraft Corp 7DCTC A-759
  • American Champion Aircraft Corp 7ECTC A-759
  • American Champion Aircraft Corp 7ECATC A-759
  • American Champion Aircraft Corp 7FCTC A-759

Current at cited snapshot

Application:

FAA holder: M-20 Oil Separators LLC

FAA authority record
SA02033AT (PAGE 2)

Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line (47J series w stc's SH4-235SW, SH4-826SW or SH479SW).

Engine and powerplantView record
  • Cessna Aircraft 310TC 3A10
  • Cessna Aircraft 310ATC 3A10
  • Cessna Aircraft 310BTC 3A10
  • Cessna Aircraft 310CTC 3A10
  • Cessna Aircraft 310DTC 3A10
  • Cessna Aircraft 310ETC 3A10
  • Cessna Aircraft 310FTC 3A10
  • Cessna Aircraft 310GTC 3A10
  • Cessna Aircraft 310HTC 3A10
  • Cessna Aircraft 310ITC 3A10
  • Cessna Aircraft 310JTC 3A10
  • Cessna Aircraft 310J-1TC 3A10
  • Cessna Aircraft 310KTC 3A10
  • Cessna Aircraft 310LTC 3A10
  • Cessna Aircraft 310NTC 3A10
  • Cessna Aircraft 310PTC 3A10
  • Cessna Aircraft 310QTC 3A10
  • Cessna Aircraft 310RTC 3A10
  • Cessna Aircraft E310HTC 3A10
  • Cessna Aircraft E310JTC 3A10
  • Cessna Aircraft T310PTC 3A10
  • Cessna Aircraft T310QTC 3A10
  • Cessna Aircraft T310RTC 3A10
  • Cessna Aircraft 172TC 3A12
  • Cessna Aircraft 172ATC 3A12
  • Cessna Aircraft 172BTC 3A12
  • Cessna Aircraft 172CTC 3A12
  • Cessna Aircraft 172DTC 3A12
  • Cessna Aircraft 172ETC 3A12
  • Cessna Aircraft 172FTC 3A12
  • Cessna Aircraft 172F (USAF T-41A)TC 3A12
  • Cessna Aircraft 172GTC 3A12
  • Cessna Aircraft 172HTC 3A12
  • Cessna Aircraft 172H (USAF T-41A)TC 3A12
  • Cessna Aircraft 172ITC 3A12
  • Cessna Aircraft 172KTC 3A12
  • Cessna Aircraft 172LTC 3A12
  • Cessna Aircraft 172MTC 3A12
  • Cessna Aircraft 172NTC 3A12
  • Cessna Aircraft 172PTC 3A12

Current at cited snapshot

Application:

FAA holder: M-20 Oil Separators LLC

FAA authority record
SA02033AT (PAGE 3)

Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line (47J series w stc's SH4-235SW, SH4-826SW or SH479SW).

Engine and powerplantView record
  • Lancair LC41-550FGTC A00003SE
  • LanShe Aerospace MAC-125CTC 3A1
  • LanShe Aerospace MAC-145TC 3A1
  • LanShe Aerospace MAC-145ATC 3A1
  • LanShe Aerospace MAC-145BTC 3A1
  • Latino American De Aviacion (Lavia) SA PA-25TC 2A10
  • Latino American De Aviacion (Lavia) SA PA-25-235TC 2A10
  • Latino American De Aviacion (Lavia) SA PA-25-260TC 2A10
  • Liberty Aerospace XL-2TC A00008DE
  • Luscombe Aircraft 11ATC A-804
  • Don Luscombe Aviation History Foundation 8TC A-694
  • Don Luscombe Aviation History Foundation 8ATC A-694
  • Don Luscombe Aviation History Foundation 8BTC A-694
  • Don Luscombe Aviation History Foundation 8CTC A-694
  • Don Luscombe Aviation History Foundation 8DTC A-694
  • Don Luscombe Aviation History Foundation 8ETC A-694
  • Don Luscombe Aviation History Foundation 8FTC A-694
  • Don Luscombe Aviation History Foundation T-8FTC A-694
  • Maule Aerospace Technology Bee Dee M-4TC 3A23
  • Maule Aerospace Technology M-4TC 3A23
  • Maule Aerospace Technology M-4-180CTC 3A23
  • Maule Aerospace Technology M-4-180STC 3A23
  • Maule Aerospace Technology M-4-180TTC 3A23
  • Maule Aerospace Technology M-4-210TC 3A23
  • Maule Aerospace Technology M-4-210CTC 3A23
  • Maule Aerospace Technology M-4-210STC 3A23
  • Maule Aerospace Technology M-4-210TTC 3A23
  • Maule Aerospace Technology M-4-220TC 3A23
  • Maule Aerospace Technology M-4-220CTC 3A23
  • Maule Aerospace Technology M-4-220STC 3A23
  • Maule Aerospace Technology M-4-220TTC 3A23
  • Maule Aerospace Technology M-4CTC 3A23
  • Maule Aerospace Technology M-4STC 3A23
  • Maule Aerospace Technology M-4TTC 3A23
  • Maule Aerospace Technology M-5-180CTC 3A23
  • Maule Aerospace Technology M-5-200TC 3A23
  • Maule Aerospace Technology M-5-210CTC 3A23
  • Maule Aerospace Technology M-5-210TCTC 3A23
  • Maule Aerospace Technology M-5-220CTC 3A23
  • Maule Aerospace Technology M-5-235CTC 3A23

Current at cited snapshot

Application:

FAA holder: M-20 Oil Separators LLC

FAA authority record
SA02033AT (PAGE 4)

Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line (47J series w stc's SH4-235SW, SH4-826SW or SH479SW).

Engine and powerplantView record
  • Arizona Aerospace Foundation DC-65TC A-746
  • Arizona Aerospace Foundation DCO-65TC A-746
  • Arizona Aerospace Foundation DL-65TC A-746
  • Cessna Aircraft F337ETC A23EU
  • Cessna Aircraft F337FTC A23EU
  • Cessna Aircraft F337GTC A23EU
  • Cessna Aircraft F337HTC A23EU
  • Cessna Aircraft FT337ETC A23EU
  • Cessna Aircraft FT337FTC A23EU
  • Cessna Aircraft FT337GPTC A23EU
  • Cessna Aircraft FT337HPTC A23EU
  • Consolidated Vultee Aircraft Stinson Division 10ATC A-738
  • Consolidated Vultee Aircraft Stinson Division L-5TC A-764
  • Consolidated Vultee Aircraft Stinson Division L-5BTC A-764
  • Consolidated Vultee Aircraft Stinson Division L-5CTC A-764
  • Consolidated Vultee Aircraft Stinson Division L-5DTC A-764
  • Consolidated Vultee Aircraft Stinson Division L-5ETC A-764
  • Consolidated Vultee Aircraft Stinson Division L-5E-1TC A-764
  • EADS-PZL Warszawa-Okecie SA PZL-104 WILGA 80TC A55EU
  • Executive Airlines Army L-1TC LTC-26
  • Executive Airlines Army L-1ATC LTC-26
  • Executive Airlines Army L-1BTC LTC-26
  • Executive Airlines Army L-1CTC LTC-26
  • Executive Airlines Army L-1DTC LTC-26
  • Executive Airlines Army L-1ETC LTC-26
  • Executive Airlines Army L-1FTC LTC-26
  • Hawker Beechcraft 50TC 5A4
  • Hawker Beechcraft B50TC 5A4
  • Hawker Beechcraft C50TC 5A4
  • Hawker Beechcraft D50TC 5A4
  • Hawker Beechcraft D50ATC 5A4
  • Hawker Beechcraft D50BTC 5A4
  • Hawker Beechcraft D50CTC 5A4
  • Hawker Beechcraft D50ETC 5A4
  • Hawker Beechcraft D50E-5990TC 5A4
  • Hawker Beechcraft E50TC 5A4
  • Hawker Beechcraft F50TC 5A4
  • Hawker Beechcraft G50TC 5A4
  • Hawker Beechcraft H50TC 5A4
  • Hawker Beechcraft J50TC 5A4

Current at cited snapshot

Application:

FAA holder: M-20 Oil Separators LLC

FAA authority record
SA02033AT (PAGE 5)

Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line (47J series w stc's SH4-235SW, SH4-826SW or SH479SW).

Engine and powerplantView record
  • Arizona Aerospace Foundation DC-65TC A-746
  • Bell Helicopter Textron 47JTC 2H1
  • Bell Helicopter Textron 47J-2TC 2H1
  • Bell Helicopter Textron 47J-2ATC 2H1
  • Bell Helicopter Textron 47KTC 2H1
  • Bell Helicopter Textron 47G-2ATC 2H3
  • Bell Helicopter Textron 47G-2A-1TC 2H3
  • Bell Helicopter Textron 47G-3TC 2H3
  • Bell Helicopter Textron 47G-3BTC 2H3
  • Bell Helicopter Textron 47G-3B-1TC 2H3
  • Bell Helicopter Textron 47G-4TC 2H3
  • Bell Helicopter Textron 47G-4ATC 2H3
  • Bell Helicopter Textron 47BTC H-1
  • Bell Helicopter Textron 47B3TC H-1
  • Bell Helicopter Textron 47DTC H-1
  • Bell Helicopter Textron 47D1TC H-1
  • Bell Helicopter Textron 47ETC H-1
  • Bell Helicopter Textron 47GTC H-1
  • Bell Helicopter Textron 47G-2TC H-1
  • Bell Helicopter Textron 47H-1TC H-1
  • Brantly International B-2TC 2H2
  • Brantly International B-2ATC 2H2
  • Brantly International B-2BTC 2H2
  • Brantly International 305TC H3SW
  • Consolidated Vultee Aircraft Stinson Division 10TC A-709
  • Consolidated Vultee Aircraft Stinson Division HW-75TC A-709
  • Consolidated Vultee Aircraft Stinson Division V-77TC A-774
  • Consolidated Vultee Aircraft Stinson Division SM-2AATC ATC 145
  • Consolidated Vultee Aircraft Stinson Division SM-1TC ATC 16 Stinson
  • Consolidated Vultee Aircraft Stinson Division SM-2ACTC ATC 194
  • Consolidated Vultee Aircraft Stinson Division SM-2ACSTC ATC 194
  • Consolidated Vultee Aircraft Stinson Division SM-8BTC ATC 294
  • Consolidated Vultee Aircraft Stinson Division SM-8ATC ATC 295
  • Consolidated Vultee Aircraft Stinson Division SM-7B (Army L-12A)TC ATC 329
  • Consolidated Vultee Aircraft Stinson Division SM-6000 AirlinerTC ATC 335
  • Consolidated Vultee Aircraft Stinson Division SM-6000-BTC ATC 420
  • Consolidated Vultee Aircraft Stinson Division JR. STC ATC 423
  • Consolidated Vultee Aircraft Stinson Division WTC ATC 435
  • Consolidated Vultee Aircraft Stinson Division JR. RTC ATC 457
  • Consolidated Vultee Aircraft Stinson Division UTC ATC 484

Current at cited snapshot

Application:

FAA holder: M-20 Oil Separators LLC

FAA authority record
SA02033AT (PAGE 6)

Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line (47J series w stc's SH4-235SW, SH4-826SW or SH479SW).

Engine and powerplantView record
  • Allied Ag Cat Productions G-164TC 1A16
  • Allied Ag Cat Productions G-164ATC 1A16
  • Ayres 600 S-2DTC A3SW
  • Ayres S-2RTC A3SW
  • Ayres S2R-R1340TC A3SW
  • Ayres S2R-R3STC A3SW
  • Boeing Airplane Wichita Division IB75ATC A-743
  • Cessna Aircraft 402TC A7CE
  • Cessna Aircraft 411TC A7CE
  • Cessna Aircraft 411ATC A7CE
  • Cessna Aircraft 421TC A7CE
  • Cessna Aircraft 421ATC A7CE
  • Cessna Aircraft 421BTC A7CE
  • Cessna Aircraft 421CTC A7CE
  • Cirrus Design SR20TC A00009CH
  • Cirrus Design SR22TC A00009CH
  • Consolidated Vultee Aircraft Stinson Division BT-13TC A-2-571
  • Consolidated Vultee Aircraft Stinson Division BT-13A (Army SNV-1)TC A-2-571
  • Consolidated Vultee Aircraft Stinson Division BT-13B(Navy SNV-2)TC A-2-571
  • Consolidated Vultee Aircraft Stinson Division BT-15TC A-2-571
  • Consolidated Vultee Aircraft Stinson Division SM-1FTC ATC 136
  • Consolidated Vultee Aircraft Stinson Division SM-7ATC ATC 298
  • Consolidated Vultee Aircraft Stinson Division SR-8ETC ATC 609
  • Consolidated Vultee Aircraft Stinson Division SR-9E (Army UC-81J)TC ATC 625
  • Consolidated Vultee Aircraft Stinson Division SR-9F (Army UC-81E)TC ATC 640
  • Consolidated Vultee Aircraft Stinson Division SR-10E (Army UC-81H)TC TC 679
  • Consolidated Vultee Aircraft Stinson Division SR-10KTC TC 679
  • Consolidated Vultee Aircraft Stinson Division SR-10F (Army UC-81F)TC TC 685
  • New Piper Aircraft PA-24-400TC 1A15
  • New Piper Aircraft PA-31-350TC A20SO
  • New Piper Aircraft PA-46-350PTC A25SO
  • New Piper Aircraft PA-36-375TC A9SO
  • Raytheon Aircraft 56TCTC 3A16
  • Raytheon Aircraft A56TCTC 3A16
  • Raytheon Aircraft 65TC 3A20
  • Raytheon Aircraft 65-80TC 3A20
  • Raytheon Aircraft 65-88TC 3A20
  • Raytheon Aircraft 65-A80TC 3A20
  • Raytheon Aircraft 65-A80-8800TC 3A20
  • Raytheon Aircraft 65-B80TC 3A20

Current at cited snapshot

Application:

FAA holder: M-20 Oil Separators LLC

FAA authority record
SA02520AT

Installation of M-20 Oil Separator, model 600-WP.

Other aircraft modificationsView record
  • Aerostar Aircraft PA-60-600 (Aerostar 600)TC A17WE
  • Aerostar Aircraft PA-60-601 (Aerostar 601)TC A17WE
  • Aerostar Aircraft PA-60-601P (Aerostar 601P)TC A17WE
  • Aerostar Aircraft PA-60-602P (Aerostar 602P)TC A17WE
  • Aerostar Aircraft PA-60-700P (Aerostar 700P)TC A17WE
  • Air Tractor AT-250TC A9SW
  • Air Tractor AT-300TC A9SW
  • Air Tractor AT-301TC A9SW
  • Alexandria Aircraft 14-19TC 1A3
  • Alexandria Aircraft 14-19-2TC 1A3
  • Alexandria Aircraft 14-19-3TC 1A3
  • Alexandria Aircraft 14-19-3ATC 1A3
  • Alexandria Aircraft 17-30TC 1A3
  • Alexandria Aircraft 17-31TC 1A3
  • Alexandria Aircraft 17-31TCTC 1A3
  • Alexandria Aircraft 17-30ATC A18CE
  • Alexandria Aircraft 17-31ATC A18CE
  • Alexandria Aircraft 17-31ATCTC A18CE
  • Allied Ag Cat Productions G-164TC 1A16
  • Allied Ag Cat Productions G-164ATC 1A16
  • American Champion Aircraft Corp 7ACTC A-759
  • American Champion Aircraft Corp 7ACATC A-759
  • American Champion Aircraft Corp 7BCM (Army L-16A)TC A-759
  • American Champion Aircraft Corp 7CCM (Army L-16B)TC A-759
  • American Champion Aircraft Corp 7DCTC A-759
  • American Champion Aircraft Corp 7ECTC A-759
  • American Champion Aircraft Corp 7ECATC A-759
  • American Champion Aircraft Corp 7FCTC A-759
  • American Champion Aircraft Corp 7GCTC A-759
  • American Champion Aircraft Corp 7GCATC A-759
  • American Champion Aircraft Corp 7GCAATC A-759
  • American Champion Aircraft Corp 7GCBTC A-759
  • American Champion Aircraft Corp 7GCBATC A-759
  • American Champion Aircraft Corp 7GCBCTC A-759
  • American Champion Aircraft Corp 7HCTC A-759
  • American Champion Aircraft Corp 7JCTC A-759
  • American Champion Aircraft Corp 7KCTC A-759
  • American Champion Aircraft Corp 7KCABTC A-759
  • American Champion Aircraft Corp S7ACTC A-759
  • American Champion Aircraft Corp S7CCMTC A-759

Current at cited snapshot

Application:

FAA holder: M-20 Oil Separators LLC

FAA authority record
SA01642AT

Installation of a Lycoming model IO-360-A1A, or IO-360-A1B6D, or IO-360-A3B6 or IO-360-A3B6D engine modified.

Engine and powerplantView record
  • Mooney Aircraft M20ETC 2A3
  • Mooney Aircraft M20FTC 2A3
  • Mooney Aircraft M20TC 2A3
  • Mooney Aircraft M20JTC 2A3

Current at cited snapshot

Application: Not listed

FAA holder: M-20 Oil Separators LLC

FAA authority record