# Aero Commander 681 - Type: Aircraft model (FAA registry) - Registry code: 0141718 - Manufacturer (registry): AERO COMMANDER - Model: 681 - Aircraft type: Fixed wing multi engine - Category: Airplane - Engines: 2 · Turbo-prop - Seats: 11 - Weight class: Up to 12,499 lb - Cruise speed: 188 mph - Certification: Type certificated - Data sheet: [TCDS 2A4](https://openairdocs.org/tcds/2A4) (OpenAirDocs) - Holder: Twin Commander Aircraft LLC - Registered aircraft: 6 - Page: https://openairdocs.org/model/aero-commander-681 Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker. ## ADs that may apply (OpenAirDocs) Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. - [AD 84-10-07](https://openairdocs.org/ad/84-10-07): Emergency LG Extension System Modification · Twin Commander 680-T, 680-V, 680-W and 1 more. Effective Jun 23, 2011 - [AD 2005-18-20](https://openairdocs.org/ad/2005-18-20): "FASTprop" propeller de-icers · Hartzell PHC-C3YF-1RF/F8468A(B,K)-8R constant speed propeller (STC SA00718LA or 17 others). Effective Oct 14, 2005 - [AD 2005-01-19](https://openairdocs.org/ad/2005-01-19): Mode S transponders · GARMIN International GTX 330D, GTX 330, GTX 33D and 830 more. Effective Feb 23, 2005 - [AD 2000-02-30](https://openairdocs.org/ad/2000-02-30): Airframe Pneumatic Deicing Boots · Twin Commander 680, 680-E, 680-F and 15 more. Effective Mar 24, 2000 - [AD 98-08-25 R1](https://openairdocs.org/ad/98-08-25-R1): Nose Landing Gear (NLG) Drag Link Bolt · Twin Commander 500-S, 500-U, 680-F and 9 more. Effective Jan 5, 1999 - [AD 98-20-34](https://openairdocs.org/ad/98-20-34): Airplane Flight Manuals--Severe Icing Conditions · Twin Commander 500, 500-A, 500-B and 24 more. Effective Nov 3, 1998 - [AD 98-14-03](https://openairdocs.org/ad/98-14-03): Transponders · Cessna 172, 172A, 172B and 230 more. Effective Aug 16, 1998 - [AD 98-07-17](https://openairdocs.org/ad/98-07-17): Flap System · Twin Commander 500, 500-A, 500-B and 27 more. Effective May 29, 1998 - [AD 98-08-19](https://openairdocs.org/ad/98-08-19): Wing to Fuselage Attachment Brackets and Straps · Twin Commander 500, 500-A, 500-B and 27 more. Effective May 18, 1998 - [AD 95-19-18](https://openairdocs.org/ad/95-19-18): Turbulent Air Penetration and Maneuvering Speeds · Twin Commander 680-T, 680-V, 680-W and 9 more. Effective Oct 25, 1995 - [AD 94-04-14](https://openairdocs.org/ad/94-04-14): Spar Cap · Twin Commander 500-S, 500-U, 680-FL(P) and 6 more. Effective Apr 12, 1994 - [AD 94-04-13](https://openairdocs.org/ad/94-04-13): Spar Cap · Twin Commander 500, 500-A, 500-B and 17 more. Effective Apr 12, 1994 - [AD 79-07-02](https://openairdocs.org/ad/79-07-02): Batteries · Aircraft Parts & Development A, A-2, A-3 and 149 more. Effective Apr 3, 1979 - [AD 78-05-06](https://openairdocs.org/ad/78-05-06): Flexible Fuel Cells · Cessna 180, 182, 185 and 98 more. Effective Jun 30, 1978 Historical (superseded or no longer in force): - [AD 98-08-25](https://openairdocs.org/ad/98-08-25) (historical): Nose Landing Gear (NLG) Drag Link Bolt · Twin Commander 500-S, 500-U, 680-F and 9 more. Effective May 18, 1998 - [AD 96-12-08](https://openairdocs.org/ad/96-12-08) (historical): Nose Landing Gear (NLG) Drag Link Bolt · Twin Commander 500-S, 500-U, 680-F and 8 more. Effective Jun 27, 1996 - [AD 94-04-17](https://openairdocs.org/ad/94-04-17) (historical): Flap System Cable · Twin Commander 500, 500-A, 500-B and 27 more. Effective Apr 15, 1994 ## Information bulletins (advisory) (1) - [SAIB 2023-14](https://openairdocs.org/saib/2023-14): Landing Gear Retract/Extend System. Issued Nov 14, 2023 ## Registered aircraft (6) - [N2749G](https://openairdocs.org/aircraft/N2749G): [Lo Pilato Family Flights Inc](https://openairdocs.org/faa-owner/LO%20PILATO%20FAMILY%20FLIGHTS%20INC), [Coral Gables, FL](https://openairdocs.org/faa-place/FL/Coral%20Gables), built 1971, S/N 6047 - [N2750G](https://openairdocs.org/aircraft/N2750G): [Lo Pilato Family Flights Inc](https://openairdocs.org/faa-owner/LO%20PILATO%20FAMILY%20FLIGHTS%20INC), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1972, S/N 6059 - [N29PR](https://openairdocs.org/aircraft/N29PR): [Ga Flying LLC](https://openairdocs.org/faa-owner/GA%20FLYING%20LLC), [Kalispell, MT](https://openairdocs.org/faa-place/MT/Kalispell), built 1969, S/N 6018 - [N526WY](https://openairdocs.org/aircraft/N526WY): [Steelesky Ltd](https://openairdocs.org/faa-owner/STEELESKY%20LTD), [Maineville, OH](https://openairdocs.org/faa-place/OH/Maineville), built 1971, S/N 6051 - [N681SP](https://openairdocs.org/aircraft/N681SP): [D&K Harvesting Inc](https://openairdocs.org/faa-owner/D%26K%20HARVESTING%20INC), [Labelle, FL](https://openairdocs.org/faa-place/FL/Labelle), S/N 6027 - [N681TC](https://openairdocs.org/aircraft/N681TC): [Rockstar Air LLC](https://openairdocs.org/faa-owner/ROCKSTAR%20AIR%20LLC), [Waco, TX](https://openairdocs.org/faa-place/TX/Waco), built 1971, S/N 6054 ## NTSB investigations (7) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB MIA98WA183](https://openairdocs.org/ntsb/MIA98WA183), Jun 7, 1998: Aero Commander 681 (N100GL), Fresh Creek, Congo - Kinshasa, substantial damage - [NTSB IAD97FA025](https://openairdocs.org/ntsb/IAD97FA025), Nov 30, 1996: Aero Commander 681 (N9129N), Mansfield, OH, destroyed, 1 fatal. Probable cause: the pilot's early descent below the minimum descent altitude (MDA), while preparing to land from an instrument approach, and his failure to maintain adequate altitude and clearance from… - [NTSB MIA95WA169](https://openairdocs.org/ntsb/MIA95WA169), Jun 30, 1995: Aero Commander 681 (N70RF), Nassau, Bahamas, substantial damage - [NTSB LAX94LA163](https://openairdocs.org/ntsb/LAX94LA163), Mar 13, 1994: Rockwell 681 (N78CH), Phoenix, AZ, substantial damage. Probable cause: the failure of the hydraulic and nitrogen system pressure lines, due to an inadequate maintenance inspection program, which failed to detect the corrosion condition of the lines. - [NTSB LAX81FA041](https://openairdocs.org/ntsb/LAX81FA041), Jan 27, 1981: Aero Comdr 681 (N500JP), Winnemucca, NV, destroyed, 2 fatal - [NTSB IAD78FA048](https://openairdocs.org/ntsb/IAD78FA048), Mar 8, 1978: Aero Comdr 681 (N5NP), Greenup, KY, destroyed, 3 fatal - [NTSB FTW71AF025](https://openairdocs.org/ntsb/FTW71AF025), Nov 25, 1970: Aero Comdr 681 (N9060N), Altus, OK, destroyed, 1 fatal ## FAA accident and incident reports (12) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Accident 19961130036879A](https://openairdocs.org/incident/19961130036879A), Nov 30, 1996: Gulstm 681 (N9129N), Mansfield, OH, Destroyed, 1 fatal. Aircraft crashed whiel attempting to land. (-23) the pilot was making a VOR runway 14 IFR approach to Mansfield, Ohio. During the approach the aircraft… - [Incident 19960301006279I](https://openairdocs.org/incident/19960301006279I), Mar 1, 1996: Gulstm 681 (N100GL), San Angelo, TX, Minor damage. Narrative: this was a pleasure/business trip from houston, TX to San Angelo, TX. During landing gear extension at San Angelo, it was noted that the nose wheel… - [Accident 19950630015959A](https://openairdocs.org/incident/19950630015959A), Jun 30, 1995: Gulstm 681 (N70RF), Nassau, Bahamas, Substantial damage. Crashed short of runway. - [Accident 19940312005079A](https://openairdocs.org/incident/19940312005079A), Mar 12, 1994: Gulstm 681 (N78CH), Phoenix, AZ, Substantial damage. EMS flight landed with gear partial down. Hydraulic system empty. Fluid leak under rear seat. Line corroded pitted. - [Incident 19930701028769I](https://openairdocs.org/incident/19930701028769I), Jul 1, 1993: Gulstm 681 (N78CH), San Angelo, TX, Minor damage. Co-pilot window blew out in flight. Diverted to San Angelo. Landed safely. Two nurses hurt slightly. - [Incident 19861003077869I](https://openairdocs.org/incident/19861003077869I), Oct 3, 1986: Gulstm 681 (N114MR), Bessemer, AL, Minor damage. Left gear scissor broke on touchdown causing tire to turn and shimmy. - [Incident 19830614037559I](https://openairdocs.org/incident/19830614037559I), Jun 14, 1983: Gulstm 681 (N78CH), Jennings, LA, Minor damage. Landed gear up. Failed to use a landing checklist. - [Incident 19820825050009I](https://openairdocs.org/incident/19820825050009I), Aug 25, 1982: Gulstm 681 (N114MR), Houston, TX, Minor damage. Right main gear cocked on extension damaged gear on landing. Strut had been cracked prior to incident. - [Accident 19810127002949A](https://openairdocs.org/incident/19810127002949A), Jan 27, 1981: Rkwell 681 (N500JP), Winnemucca, NV, Destroyed, 1 fatal. Flew into ground on final after circling airport in a snow shower and severe turbulence. Dark night. - [Incident 19800617051369I](https://openairdocs.org/incident/19800617051369I), Jun 17, 1980: Rkwell 681 (N114MR), Tomball, TX, Minor damage. Pilot became ill, failed to extend gear. Go-around made, landed with gear down. - [Incident 19791203048169I](https://openairdocs.org/incident/19791203048169I), Dec 3, 1979: Rkwell 681 (N22RT), Sioux Falls, SD. Right engine failed on takeoff, landed safely after go around. Cause of problem unknown. - [Accident 19780308036739A](https://openairdocs.org/incident/19780308036739A), Mar 8, 1978: Rkwell 690 (N5NP), Greenup, KY, Destroyed, 1 fatal ## Service difficulty reports (3) As reported by operators and repair stations, by the model named in the report. - [SDR CA091023003](https://openairdocs.org/sdr/CA091023003), Oct 20, 2009: TRANSMITTER. FAILED. (CAN) DEPARTED (IFR) & SHORTLY AFTER TAKEOFF, PILOT REPORTED AN "ELEVATOR PROBLEM" & DECLARED AN EMERGENCY. ADVISED CENTRE RETURNING TO AIRPORT. ARFF CALLED OUT - [SDR 96ZZZX1160](https://openairdocs.org/sdr/96ZZZX1160), Jul 18, 1995: FCU MOUNT. BOLT MISSING. RT ENGINE IN-FLIGHT SHUT DOWN. INVESTIGATION FOUND RT P3 AIR LINE FITTING FOR FUEL CONT DISCONNECTED. FURTHER INVESTIGATION FOUND FUEL CONT LOWER MOUNT BOLT MIS - [SDR 95ZZZX3226](https://openairdocs.org/sdr/95ZZZX3226), Jun 7, 1995: TUBE ASSY. HOLE CHAFED. AILERON DRUMS SUPPORT CHANNEL, PN 5530168-3. AT APROX STA 33.0, IS SECURED TO THE STRUCTURE WITH 4 EACH MS27039-1-09 SCREWS. THE HYD PRESSURE LINE WAS ROUTED UN ## STCs that may be installed (OpenAirDocs) (123, first 50) Approved for this model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has. - [STC SA02571SE](https://openairdocs.org/stc/SA02571SE): Installation of Garmin G500/G600 TXi Integrated Avionics System (Primary Flight Display, Multi-Function Display, and Engine Indicating System Display). Garmin International Inc - [STC SA01800SE](https://openairdocs.org/stc/SA01800SE): Fabrication and installation of new or replacement of existing instrument panel lights dimmer control. TCW Technologies, LLC - [STC SA01861SE](https://openairdocs.org/stc/SA01861SE): Fabrication and installation of Landing Light Controller. TCW Technologies, LLC - [STC SA04837NY](https://openairdocs.org/stc/SA04837NY): Installation of AeroLED's Holdings, LLC., position lights, navigation lights, strobe lights and beacon lights. AeroLED's Holdings, LLC - [STC SA02019SE-D](https://openairdocs.org/stc/SA02019SE-D): Installation of Garmin Model GTN 625/635/650; 725/750 Navigation System. Garmin International Inc - [STC SA800EA](https://openairdocs.org/stc/SA800EA): Installation of Whelen Anti-Collision, Position, or Anti-Collision/Position Light System, and applicable associated power supplies. Whelen Aerospace Technologies - [STC SA02511SE](https://openairdocs.org/stc/SA02511SE): Installation of replacement fuel quantity indicator sending unit(s). CiES Inc - [STC SA11300DS](https://openairdocs.org/stc/SA11300DS): Upgrade previously installed Collins Aerospace Radar Altimeter. BHE & Associates Ltd - [STC SA8408SW](https://openairdocs.org/stc/SA8408SW): Replace the o-ring seals in the landing gear lower strut seal. Metrea Special Aerospace ISR Inc - [STC SA02738CH](https://openairdocs.org/stc/SA02738CH): Installation of L-3 Communications Avionics Systems. Acron Aviation Inc - [STC SA04046CH PAGE 2](https://openairdocs.org/stc/SA04046CH%20PAGE%202): Installation of L-3 GENESIS (TM) Electronic Standby Instrument System (ESI-500/MAG-500). Acron Aviation Inc - [STC SA02386AK](https://openairdocs.org/stc/SA02386AK): Replacement of existing landing and/or taxi light reflector and bulbs with Light Emitting Diode (LED) lighting systems. AeroLED's Holding LLC - [STC SA02658SE](https://openairdocs.org/stc/SA02658SE): Installation of Garmin GI 275 Multi-Function Display System. Garmin International Inc - [STC SA02532AT](https://openairdocs.org/stc/SA02532AT): Installation of subject Michelin tires on appropriate aircraft. For Michelin 5, 6, 8, and 10-inch rim diameter tires on General Aviation Aircraft. Michelin North America Inc - [STC SA497GL](https://openairdocs.org/stc/SA497GL): Install Aircraft Wheel and Brake conversion kit 199-80 (MIL-H-5606 system). Kaman Corporation Aircraft Wheel and Brake LLC - [STC SA1458GL](https://openairdocs.org/stc/SA1458GL): Installation of a Cleveland nose wheel. Kaman Corporation Aircraft Wheel and Brake LLC - [STC SA02203AK](https://openairdocs.org/stc/SA02203AK): Installation of FlightLogic Synthetic Vision Electronic Flight Information System (EFIS-SV). Genesys Aerosystems Inc - [STC SA02254AK](https://openairdocs.org/stc/SA02254AK): Installation of "Single Screen", "2 or 3 Screen", "Dual Screen", or "4 or 6 screen". Genesys Aerosystems Inc - [STC SA02444AK](https://openairdocs.org/stc/SA02444AK): Approval of the L-3 Communications NGT 9000/9000R ADS-B system installed. ADS-B Technologies LLC - [STC SA09856AC](https://openairdocs.org/stc/SA09856AC): Installation of BendixKing Aerowave 100 In-flight Data Link System for non-essential, non-required aircraft Cabin Systems & Equipments. Honeywell International Inc (Bendix King) - [STC SA11174SC PAGE 2](https://openairdocs.org/stc/SA11174SC%20PAGE%202): Installation of BendixKing by Honeywell KSN 770 and KSN 765 WAAS LPV approach capable nav/comm systems. Honeywell International Inc (Bendix King) - [STC SA02265SE](https://openairdocs.org/stc/SA02265SE): Installation of a camera housing. Airborne Sensor LLC - [STC SA02075SE](https://openairdocs.org/stc/SA02075SE): Installation of a Mid-Continent MD835( ) Lithium Ion Battery. Mid-Continent Instrument Co. Inc - [STC SA09763DS](https://openairdocs.org/stc/SA09763DS): Installation of an S-TEC 01326 Digital Flight Control System (DFCS). S-TEC Corporation - [STC SA10236SC](https://openairdocs.org/stc/SA10236SC): Installation of a GDC 31 Roll Steering Converter. DAC International Inc - [STC SA01452CH](https://openairdocs.org/stc/SA01452CH): Installation of an air ambulance conversion kit. Med-Pac Inc - [STC SA01714WI](https://openairdocs.org/stc/SA01714WI): Installation of a Garmin transponders: (a) GTX 330/330D/33/33D with ADS-B Out functionality; (b) GTX 335/335R/345/345R with ADS-B Out and In functionality; or (c) GTX 335R/345R with ADS-B Out functionality in select airplanes installed with G950/G1000 systems. Garmin International Inc - [STC SA00344BO PAGE 2](https://openairdocs.org/stc/SA00344BO%20PAGE%202): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. Whelen Aerospace Technologies - [STC SA615EA](https://openairdocs.org/stc/SA615EA): Installation of a Whelen Anti-Collision Strobe Light System as replacement for originally installed anti-collision lights. Whelen Aerospace Technologies - [STC SA00098SE](https://openairdocs.org/stc/SA00098SE): Installation of emergency medical stretcher, oxygen, and electrical systems. LifePort LLC - [STC SA00765DE](https://openairdocs.org/stc/SA00765DE): Installation of Automatic Dependent Surveillance Broadcast (ADS-B) Out functionality using the BendixKing KT74 Transponder and qualified position sensor. Peregrine - [STC SA04165NY](https://openairdocs.org/stc/SA04165NY): Installation of Latitude Technologies Skynode S200 Satcom system must be performed. Latitude Technologies Corporation - [STC SA02153LA-D PAGE 2](https://openairdocs.org/stc/SA02153LA-D%20PAGE%202): Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System. Garmin International Inc - [STC SA02503AK](https://openairdocs.org/stc/SA02503AK): Installation of AMSAFE State of the Art Restraint System (SOARS) inflatable restraints. AMSAFE Inc - [STC SA02013CH](https://openairdocs.org/stc/SA02013CH): Installation of Avidyne Corporation Traffic Advisory System (TAS). Avidyne Corporation - [STC SA01933LA-D](https://openairdocs.org/stc/SA01933LA-D): Installation of Garmin Model 400W / 500W Series GPS-WAAS Navigation System. Garmin International Inc - [STC SA02212AK](https://openairdocs.org/stc/SA02212AK): Replacement of existing landing and/or taxi light reflector and bulbs with high intensity discharge (HID) lighting systems. Seaplanes North LLC - [STC SA00382BO](https://openairdocs.org/stc/SA00382BO): Installation of Globalstar Antenna and Cradle provisions to support a Globalstar GPS-1700 in non-composite airplanes. Avidyne Corporation - [STC SA00343BO](https://openairdocs.org/stc/SA00343BO): Installation of a single configuration or a dual configuration Avidyne Corporation Integrated Flight Display, Model IFD540 loaded with Release 10.0 software (or later FAA approved release). Avidyne Corporation - [STC SA00352BO PAGE 2](https://openairdocs.org/stc/SA00352BO%20PAGE%202): Installation of an Avidyne Corporation Mode A/C/S Transponder with ADS-B Out capability, Model AXP340 loaded with Version 3.13 software (or later FAA approved version),. Avidyne Corporation - [STC SA1177GL](https://openairdocs.org/stc/SA1177GL): Install Aero Medical Products Mfg., Inc. Air Ambulance Stretcher P/N 125 using Installation Kit P/N 800 in accordance with Installation and Operating Instructions, Form EA 109K, dated April 23, 2001, or later FAA approved revisions. The Medical Oxygen System Kit P/N 807 is an FAA approved option. The Inverter/Pump Kit No. 812 may be installed in accordance with Inverter/Pump Installation Instructions, EA Form 170, dated June 9, 2001, or later FAA approved revisions. Paul/ Lanna Egan LLC - [STC SA00149BO](https://openairdocs.org/stc/SA00149BO): Installation of Aircraft Components, Inc. Volt and Vac Alert System, P/N 2044-1. Aircraft Components Inc - [STC SA02547AT](https://openairdocs.org/stc/SA02547AT): Installation of a Voice Alert System. Aircraft Components Inc - [STC SA03658AT](https://openairdocs.org/stc/SA03658AT): Installation of a Voice Alert System to incorporate as primary annunciators for stall and gear warnings. Aircraft Components Inc - [STC SA02119SE PAGE 2](https://openairdocs.org/stc/SA02119SE%20PAGE%202): Installation of Garmin GDL 88 ADS-B UAT Transceiver System. Garmin International Inc - [STC SA01229SE PAGE 2](https://openairdocs.org/stc/SA01229SE%20PAGE%202): Installation of GNS 480 (CNX80) GPS WAAS Navigator with integrated VHF Navigation and Communication radios. Garmin International Inc - [STC SA02442AK PAGE 2](https://openairdocs.org/stc/SA02442AK%20PAGE%202): Approval of the L-3 Communications NGT 2000/2500 ADS-B system. ADS-B Technologies, LLC - [STC SA01933LA-D PAGE 2](https://openairdocs.org/stc/SA01933LA-D%20PAGE%202): Installation of Garmin Model 400W / 500W Series GPS-WAAS Navigation System. Garmin International Inc - [STC SA02121SE](https://openairdocs.org/stc/SA02121SE): Installation of Garmin GTS 825 (TAS) or GTS 855 (TCAS I) Traffic System. Garmin International Inc - [STC SA00269BO](https://openairdocs.org/stc/SA00269BO): Installation of Avidyne Corporation TWX 670 Tactical Weather Detection System P/N 850-00026-000-( ) consisting of Avidyne Processor P/N 700-00033-000-( ), Sensor Systems Inc. Antenna P/N S72-1715-1 with doubler plate P/N S72-171530-1, and Avidyne Mounting Tray P/N 700-00034-000. Avidyne Corporation All 123: https://openairdocs.org/model/aero-commander-681/stcs.md --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.