# N234MM: 1963 Grumman G-159

- Status: Valid registration
- Airframe: [Grumman G-159](https://openairdocs.org/model/grumman-g-159) (registry code 3952202, 21 seats)
- Engine: [Rolls-Royce DART-529 series](https://openairdocs.org/engine/rolls-royce-dart-529-series) (registry code 54507)
- Data sheets: [TCDS 1A17](https://openairdocs.org/tcds/1A17) (Gulfstream Aerospace Corporation), [TCDS E-297](https://openairdocs.org/tcds/E-297) (Rolls-Royce Deutschland Ltd & Co KG) (OpenAirDocs)
- Serial number: 121
- Year built: 1963
- Type: Fixed wing multi engine
- Engine type: Turbo-prop
- Airworthiness: Standard, transport
- Airworthiness date: December 6, 1963
- Certificate issued: May 13, 1986
- Expires: August 31, 2027
- Mode S code: A2187B
- Registered owner: [Walt Disney World Co](https://openairdocs.org/faa-owner/WALT%20DISNEY%20WORLD%20CO)
- Location: [Lake Buena Vista, FL](https://openairdocs.org/faa-place/FL/Lake%20Buena%20Vista)
- Owner type: Corporation
- Owner's area on the map: 28.3917° N, 81.5672° W: Placed by OpenAirDocs at the center of ZIP code 32830, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=234MM
- Page: https://openairdocs.org/aircraft/N234MM

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every Rolls-Royce DART-529 model are included.

## ADs that may apply (OpenAirDocs): 55 in force

### Matched by airframe (Grumman G-159)

- [AD 2026-13-02](https://openairdocs.org/ad/2026-13-02): Navigation · Airbus Canada Limited Partnership 18, 49-46, 80-A and 555 more. Effective Jul 1, 2026
- [AD 2023-10-02](https://openairdocs.org/ad/2023-10-02): Indicating/Recording System, Navigation · Boeing 18, 23, 35 and 1,060 more. Effective May 26, 2023
- [AD 2006-25-02](https://openairdocs.org/ad/2006-25-02): Structural assemblies · Gulfstream Aerospace G-159. Effective Jan 11, 2007
- [AD 2001-18-05](https://openairdocs.org/ad/2001-18-05): Flight Eagle Tires · Boeing 720 Series, 720B Series, 111 and 6 more. Effective Sep 24, 2001
- [AD 2000-10-11](https://openairdocs.org/ad/2000-10-11): Pneumatic Deicing Boots · Gulfstream Aerospace G-159. Effective Jun 26, 2000
- [AD 98-13-30](https://openairdocs.org/ad/98-13-30): AFM - Limitations Section - Power Levers · Gulfstream Aerospace G-159. Effective Jul 29, 1998
- [AD 98-04-36](https://openairdocs.org/ad/98-04-36): AFM - Limitations Section - Icing · Gulfstream Aerospace G-159. Effective Mar 25, 1998
- [AD 97-16-05](https://openairdocs.org/ad/97-16-05): Wing Center Section Skin · Gulfstream Aerospace G-159. Effective Sep 5, 1997
- [AD 97-14-13](https://openairdocs.org/ad/97-14-13): Engine Mount Tube And Upper Diagonal Truss · Gulfstream Aerospace G-159. Effective Aug 15, 1997
- [AD 97-14-10](https://openairdocs.org/ad/97-14-10): Main Landing Gear Fittings · Gulfstream Aerospace G-159. Effective Aug 7, 1997
- [AD 97-14-09](https://openairdocs.org/ad/97-14-09): Elevator Trim Tab Actuators Mounting Lugs · Gulfstream Aerospace G-159. Effective Aug 7, 1997
- [AD 97-14-08](https://openairdocs.org/ad/97-14-08): MLG Uplock Beam Bracket · Gulfstream Aerospace G-159. Effective Aug 7, 1997
- [AD 96-25-12](https://openairdocs.org/ad/96-25-12): Auxiliary Power Units · BAE Systems HS 748 Series 2A, HS 748 Series 2B, 707-100 Long Body and 74 more. Effective Jan 13, 1997
- [AD 95-26-15 R1](https://openairdocs.org/ad/95-26-15-R1): Traffic Alert and Collision Avoidance Systems · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 159 more. Effective Dec 26, 1996
- [AD 95-22-01](https://openairdocs.org/ad/95-22-01): Fluorescent Lighting System · Aerospace Lighting Fluorescent lighting systems, A310-203, A310-204 and 74 more. Effective Dec 4, 1995
- [AD 94-01-05](https://openairdocs.org/ad/94-01-05): Traffic Alert and Collision Avoidance System II Processors · Airbus A340-211, A340-212, A340-213 and 85 more. Effective Feb 4, 1994
- [AD 87-05-51](https://openairdocs.org/ad/87-05-51): Floor Proximity Lighting · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 48 more. Effective May 18, 1987
- [AD 84-20-08](https://openairdocs.org/ad/84-20-08): Forward/AFT Eng. Mount Assys. · Gulfstream Aerospace G-159. Effective Jan 22, 1985
- [AD 81-04-02](https://openairdocs.org/ad/81-04-02): Incorporation Of AFM Revisions · Gulfstream Aerospace G-159. Effective Feb 12, 1981
- [AD 79-06-03](https://openairdocs.org/ad/79-06-03): Electrical Shunts · Gulfstream Aerospace G-1159 and G-159. Effective Apr 2, 1979
- [AD 77-13-01](https://openairdocs.org/ad/77-13-01): Jumpseat · Gulfstream Aerospace G-1159 and G-159. Effective Apr 21, 1978
- [AD 74-23-08](https://openairdocs.org/ad/74-23-08): Fire Extinguishers · Gulfstream Aerospace G-159. Effective Nov 15, 1974
- [AD 73-14-07](https://openairdocs.org/ad/73-14-07): Interior Lining Attachments · Gulfstream Aerospace G-1159 and G-159. Effective Sep 30, 1974
- [AD 72-07-08](https://openairdocs.org/ad/72-07-08): Main Landing Gear Drag Brace · Gulfstream Aerospace G-159. Effective Mar 30, 1972
- [AD 71-23-02](https://openairdocs.org/ad/71-23-02): Attachment Fittings · Gulfstream Aerospace G-159. Effective Nov 26, 1971
- [AD 67-02-04](https://openairdocs.org/ad/67-02-04): Accessory Gear Boxes · British Aerospace Argosy AW.650 Series 101, Accessory Gear boxes, G-159 and 1 more. Effective Jun 23, 1970
- [AD 69-20-03](https://openairdocs.org/ad/69-20-03): Fuel Temperature Indicator · Gulfstream Aerospace G-159. Effective Jan 23, 1970
- [AD 69-21-02](https://openairdocs.org/ad/69-21-02): Cabin Superchargers · British Aerospace Argosy AW.650 Series 101, F27 Mark 100, F27 Mark 300 and 18 more. Effective Oct 9, 1969
- [AD 68-23-01](https://openairdocs.org/ad/68-23-01): Cabin Superchargers · British Aerospace Argosy AW.650 Series 101, F27 Mark 100, F27 Mark 300 and 18 more. Effective Nov 21, 1968
- [AD 67-33-04](https://openairdocs.org/ad/67-33-04): Aileron Control Idler · Gulfstream Aerospace G-159. Effective Dec 30, 1967
- [AD 65-13-04](https://openairdocs.org/ad/65-13-04): Nose Gear Strut Assembly · Gulfstream Aerospace G-159. Effective Jun 12, 1965
- [AD 65-09-03](https://openairdocs.org/ad/65-09-03): APU Turbine Wheel · Gulfstream Aerospace G-159. Effective Apr 21, 1965
- [AD 62-26-02](https://openairdocs.org/ad/62-26-02): Integral Tanks · Gulfstream Aerospace G-159. Effective Dec 6, 1962

### Matched by engine (Rolls-Royce DART-529 series)

- [AD 2008-16-05](https://openairdocs.org/ad/2008-16-05): Intermediate pressure turbine (IPT) disk · Rolls-Royce Deutschland Dart 528-7E, Dart 528D-7E, Dart 529-7E and 29 more. Effective Sep 4, 2008
- [AD 2007-03-13](https://openairdocs.org/ad/2007-03-13): High pressure turbine (HPT) blade platforms and shrouds · Rolls-Royce Deutschland Dart 528-7E, Dart 528D-7E, Dart 529-7E and 27 more. Effective Mar 19, 2007
- [AD 2003-17-11](https://openairdocs.org/ad/2003-17-11): Sermetel coating (Omat 7/46) · Rolls-Royce Deutschland Dart 528-7E, Dart 529-7E, Dart 529-7H and 29 more. Effective Sep 30, 2003
- [AD 2001-19-06](https://openairdocs.org/ad/2001-19-06): High Pressure Turbine Discs · Rolls-Royce Deutschland Dart 525, Dart 525F, Dart 528-7E and 31 more. Effective Oct 15, 2001
- [AD 2000-12-18](https://openairdocs.org/ad/2000-12-18): Reduction Gearbox · Rolls-Royce Deutschland Dart 511, Dart 511-7E, Dart 514-7 and 10 more. Effective Jul 31, 2000
- [AD 99-27-04](https://openairdocs.org/ad/99-27-04): Low Torque Switches · Rolls-Royce Deutschland Dart 506, Dart 510, Dart 511 and 38 more. Effective Feb 28, 2000
- [AD 99-04-09](https://openairdocs.org/ad/99-04-09): High Pressure Turbine Disk · Rolls-Royce Deutschland Dart 525, Dart 525F, Dart 526 and 35 more. Effective Feb 25, 1999
- [AD 98-04-13](https://openairdocs.org/ad/98-04-13): Propeller Low Torque Switch · Rolls-Royce Deutschland Dart 506, Dart 510, Dart 511 and 43 more. Effective Mar 24, 1998
- [AD 93-15-09](https://openairdocs.org/ad/93-15-09): Servo Fuel Pipe · Rolls-Royce Deutschland Dart 506, Dart 510, Dart 511 and 40 more. Effective Sep 7, 1993
- [AD 88-21-06](https://openairdocs.org/ad/88-21-06): High Pressure Impellers · Rolls-Royce Deutschland Dart 506, Dart 510, Dart 511 and 35 more. Effective Nov 6, 1988
- [AD 85-03-03 R1](https://openairdocs.org/ad/85-03-03-R1): Low Pressure Impeller · Rolls-Royce Deutschland Dart 506, Dart 510, Dart 511 and 38 more. Effective Jan 6, 1986
- [AD 85-06-01](https://openairdocs.org/ad/85-06-01): Flame Tube Liners And Suspension Pins · Rolls-Royce Deutschland Dart 525, Dart 525F, Dart 526 and 29 more. Effective Apr 3, 1985
- [AD 82-09-02 R1](https://openairdocs.org/ad/82-09-02-R1): Engine Fuel Manifold Assembly Connection Flexible Hose · Rolls-Royce Deutschland Dart 506, Dart 510, Dart 511 and 33 more. Effective May 12, 1983
- [AD 78-24-01 R1](https://openairdocs.org/ad/78-24-01-R1): Control Box Mounting Bolt Failure · Rolls-Royce Deutschland Dart 506, Dart 510, Dart 511 and 34 more. Effective May 12, 1983
- [AD 77-20-05 R1](https://openairdocs.org/ad/77-20-05-R1): Fuel Burner Feed And Manifold Pipes · Rolls-Royce Deutschland Dart 506, Dart 510, Dart 511 and 27 more. Effective May 12, 1983
- [AD 72-18-02 R1](https://openairdocs.org/ad/72-18-02-R1): Fuel Burner Shroud Nuts · Rolls-Royce Deutschland Dart 506, Dart 510, Dart 511 and 31 more. Effective May 12, 1983
- [AD 80-23-01](https://openairdocs.org/ad/80-23-01): Low Pressure Impellers · Rolls-Royce Deutschland Dart 506, Dart 510, Dart 511 and 38 more. Effective Oct 30, 1980
- [AD 77-21-05](https://openairdocs.org/ad/77-21-05): High Pressure Turbine Discs · Rolls-Royce Deutschland Dart 527, Dart 528-7E, Dart 528D-7E and 28 more. Effective Nov 11, 1977
- [AD 72-16-05](https://openairdocs.org/ad/72-16-05): Impellers · Rolls-Royce Deutschland Dart 506, Dart 510, Dart 511 and 35 more. Effective Dec 4, 1972
- [AD 70-15-13](https://openairdocs.org/ad/70-15-13): Fuel Washed Burners · Rolls-Royce Deutschland Dart 506, Dart 510, Dart 511 and 28 more. Effective Aug 20, 1970
- [AD 67-15-03](https://openairdocs.org/ad/67-15-03): Oil Filter · Rolls-Royce Deutschland Dart 525, Dart 525F, Dart 526 and 23 more. Effective May 14, 1967
- [AD 63-07-04](https://openairdocs.org/ad/63-07-04): Air Casing · Rolls-Royce Deutschland Dart 506, Dart 510, Dart 511 and 43 more. Effective May 2, 1963

### Historical (superseded or no longer in force)

- [AD 74-08-09 R2](https://openairdocs.org/ad/74-08-09-R2) (historical): Waste Receptacles · Aero Spacelines 377, 377MG, 377SGT and 268 more. Effective Jul 29, 1996
- [AD 2007-02-07](https://openairdocs.org/ad/2007-02-07) (historical): Intermediate pressure turbine (IPT) disk · Rolls-Royce Deutschland Dart 528-7E, Dart 528D-7E, Dart 529-7E and 29 more. Effective Feb 26, 2007

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N234MM.

## FAA accident and incident reports

None matched to N234MM.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs) (264, first 50)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Grumman G-159)

- [STC SA2622NM](https://openairdocs.org/stc/SA2622NM): Installation of Precise Flight Pulselite Control Unit in landing/taxi system. (767-200 B17) (DHC-8 101). Precise Flight Inc
- [STC ST238CH](https://openairdocs.org/stc/ST238CH): Installation of BFGoodrich TCAS I. Acron Aviation Inc
- [STC ST01930LA](https://openairdocs.org/stc/ST01930LA): Installation of Sandel Avionics SN4500 Electronic Horizontal Situation Indicator (EHSI). Sandel Avionics LLC
- [STC SA2-931](https://openairdocs.org/stc/SA2-931): Installation of Sperry SP-40 Gyropilot. Honeywell International Inc
- [STC SA1732GL](https://openairdocs.org/stc/SA1732GL): Install air ambulance conversion. Spectrum Aeromed LLC dba Spectrum Aeromed
- [STC SA571SW](https://openairdocs.org/stc/SA571SW): Installation of Collins radio altimeter system. Associated Air Center, Inc. - c/o CT Corporation System
- [STC ST00425WI](https://openairdocs.org/stc/ST00425WI): Installation of Keddeg Company P/N 21BC120 Coalescer Assembly as a replacement for P/N 83237-14 on Gulfstream G-159 Airplanes. Purolator Facet, Inc
- [STC ST02628LA](https://openairdocs.org/stc/ST02628LA): Installation of Honeywell CAS-67A Traffic Alert Collision Avoidance System (TCAS II) with Dual Honeywell MST-67A Transponder System and removal of L-3 TRC-497 Skywatch TCAS system. Battelle Memorial Institute, Pacific Northwest Division
- [STC SA1536SW](https://openairdocs.org/stc/SA1536SW): Installation of Foxtronics TRAMM BTI-600 nickel cadmium battery temperature system and an optional generator voltage control system. FoxCart GSE, LLC
- [STC SA2016NM](https://openairdocs.org/stc/SA2016NM): Installation of a de-icing system on the Rolls Royce P/N RK29954A engine inlet cowl. ROBERT W. MURRAY
- [STC SA302WE](https://openairdocs.org/stc/SA302WE): Incorporate a de-icing system (as manufactured by applicant) externally on Rotol propeller spinner as an alternate to Dowty Rotol internal elements. If applied to original spinner, Montgomery Systems Tech., Inc. P/N 72196-2 will apply. If applied to a new aluminum nose spinner P/N 72196-1 will apply. Dowty Rotol Service Bulletin Section 61-170 pages 1 and 2 outlines a revised spinner de-icing system. This is a Napier external system. Approval of the A.R.B. is indicated. (Continued on page 3). ROBERT W. MURRAY
- [STC SA122CE](https://openairdocs.org/stc/SA122CE): Install Hoskins supplementary light system consisting of colored Model A(or clear or colored Model E) wing tip lights, a Model C or 2 tail light, and optionally, two of Model 2 fuselage lights with M-3 or M-5 power supply. BF Goodrich Aerospace
- [STC SA3687SW](https://openairdocs.org/stc/SA3687SW): : Installation of Floor Proximity Lighting System in accordance with Vista Manufacturing, Inc., Drawing List G1-1000, Revision C, Dated December 02, 1986 or later FAA approved revision. BF Goodrich Aerospace
- [STC ST00682WI-D](https://openairdocs.org/stc/ST00682WI-D): Modification of Collins VHF-20/VHF-20A/VHF-20B VHF COMM Receiver Transmitter with CTL-20 Control Pro Line I System Installation to a Collins VHF-22C/VHF-22D VHF COMM Receiver Transmitter with CTL-22C Control 8.33 kHz Pro Line II System Installation in accordance with Collins Installation Instructions as listed on AML No. ST00682WI-D, Revision -, or later FAA approved revisions. Rockwell Collins Inc
- [STC SA00068SE](https://openairdocs.org/stc/SA00068SE): Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1). Electronics International Inc
- [STC SA2693NM](https://openairdocs.org/stc/SA2693NM): Installation of Electronics International digital volt/amp gauges and accessories. Electronics International Inc
- [STC ST02540AT-D](https://openairdocs.org/stc/ST02540AT-D): Installation of replacement fuel tank sealant system. FFC Manufacturing
- [STC SA1681GL](https://openairdocs.org/stc/SA1681GL): Installation of Chrysler Pentastar Aviation auxiliary generator adapter assembly. Phoenix Air Group Inc
- [STC SA1699GL](https://openairdocs.org/stc/SA1699GL): Installation of electrical system. Phoenix Air Group Inc
- [STC SA1610SO](https://openairdocs.org/stc/SA1610SO): Installation of a composite custom executive interior. Page AvJet Corp
- [STC SA1612SO](https://openairdocs.org/stc/SA1612SO): Installation of the Collins FCS-80 flight control system. Page AvJet Corp
- [STC SA1704SO](https://openairdocs.org/stc/SA1704SO): Installation of a single Global GNS-500A series 3B VLF/Omega Navigation System. Page AvJet Corp
- [STC SA2072SO](https://openairdocs.org/stc/SA2072SO): Installation of 24-passenger interior. Page AvJet Corp
- [STC SA2079SO](https://openairdocs.org/stc/SA2079SO): Installation of emergency lighting system. Page AvJet Corp
- [STC SA2080SO](https://openairdocs.org/stc/SA2080SO): Installation of a Fairchild A100A cockpit voice recorder. Page AvJet Corp
- [STC SA3154SO](https://openairdocs.org/stc/SA3154SO): Installation of an interior. Page AvJet Corp
- [STC ST01483WI-D](https://openairdocs.org/stc/ST01483WI-D): Installation of Cabin Re-configuration. Duncan Aviation Inc
- [STC SA888EA](https://openairdocs.org/stc/SA888EA): Installation of Grimes three light strobe kit 34-0303-1 as supplemental lighting. Honeywell International Inc
- [STC ST00844WI-D](https://openairdocs.org/stc/ST00844WI-D): Modification of Collins TCAS II or TCAS-94 (TCAS II) system installation with Collins TTR-920 Change 7.0 Receiver Transmitter to a Collins TCAS II or TCAS-94 OTCAS II) system installation with Collins TTR-921 or Collins TTR-4000 Change 7.0 TCAS Receiver Transmitter. Rockwell Collins Inc
- [STC ST03055AT](https://openairdocs.org/stc/ST03055AT): Installation of either a Single or Dual Sandel Model 3400 TAWS with RMI System. Phoenix Air Group Inc
- [STC SA00680SE](https://openairdocs.org/stc/SA00680SE): Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer. Electronics International
- [STC SA2893SW](https://openairdocs.org/stc/SA2893SW): Installation of one, two, or three- place side facing seat attached to seat tracks. Aviation Fabricators Inc
- [STC ST00743NY-D](https://openairdocs.org/stc/ST00743NY-D): Installation of AlliedSignal GTCP36-150J Auxillary Power Unit. Phoenix Air Group Inc
- [STC SA1181EA](https://openairdocs.org/stc/SA1181EA): Installation of Garrett AiResearch GTCP36-100(H) APU. PATS Aircraft LLC
- [STC SA1204EA](https://openairdocs.org/stc/SA1204EA): Installation of Solar T-62T-40C2 APU. PATS Aircraft LLC
- [STC SA1222EA](https://openairdocs.org/stc/SA1222EA): Replacement of bleed-air driven fan with electrically powered fan. PATS Aircraft LLC
- [STC SA3304NM](https://openairdocs.org/stc/SA3304NM): Installation of monorail sun visor system in accordance with FAA approved Rosen Product Development, Inc., Drawing List RG-I-II-00DL, Revision N/C, or later FAA approved revision. Rosen Sunvisor Systems LLC
- [STC ST01676CH](https://openairdocs.org/stc/ST01676CH): Installation of a Honeywell/AlliedSignal CAS-81 TCAS II Traffic Alert and Collision Avoidance System. Flight Systems Engineering, Inc
- [STC ST01605CH](https://openairdocs.org/stc/ST01605CH): Installation of an Allied Signal CAS-67A TCAS II Traffic Alert and Collision Avoidance System in accordance with Pro-Tech Avionics Corporation Master Drawing List Document No. 81-328L001, Revision E, dated December 6, 2001, or later FAA approved revision. Phoenix Air Group Inc
- [STC SA1373GL](https://openairdocs.org/stc/SA1373GL): Installation of Norton Radome Kit No. 4772W. Saint-Gobain Performance Plastics Corp
- [STC SA2687NM](https://openairdocs.org/stc/SA2687NM): Installation of Truboplus/ Electronics Int'l gauges and switches. Aero Manufacturing Inc
- [STC SA2-1020](https://openairdocs.org/stc/SA2-1020): Interior arrangement in the cabin from Station 133 to 525. Signature Flight Support Corporation
- [STC SA2-910](https://openairdocs.org/stc/SA2-910): Installation of electronic and interior equipment. Signature Flight Support Corporation
- [STC SA2899SW](https://openairdocs.org/stc/SA2899SW): Installation of hostess jump seat and table. Signature Flight Support Corporation
- [STC SA2900SW](https://openairdocs.org/stc/SA2900SW): Installation of toilet and outside toilet service. Signature Flight Support Corporation
- [STC SA1202SW](https://openairdocs.org/stc/SA1202SW): Modification to aircraft electrical power system. Rockwell Collins Inc
- [STC SA1514SW](https://openairdocs.org/stc/SA1514SW): Installation of following dual Collins equipment: 618M-2D VHF transceivers, 51RV-2B VHF NAV receivers, 621A-3 transponders; installation of the following single equipment: Collins 346D-1B Paging Amplifier, Collins DN101/NC103 Doppler, Collins 860F-1 DME; IDC 519-227022 Encoding Alimeter; IDC 22719-101 Vertical Speed Indicator, and Dayton Aircraft Products EB-28CD Emergency Locator Transmitter. Rockwell Collins Inc
- [STC SA1745SW](https://openairdocs.org/stc/SA1745SW): Installation of ANS-70A Area Navigation System. Rockwell Collins Inc
- [STC SA1852SW](https://openairdocs.org/stc/SA1852SW): Installation of dual FD-109 flight director/AP-105 autopilot, 54W-1C comparator, dual ALT-50 radio altimeter, dual MC-103 compasses, dual ILS-70/Bendix RVA33A VOR/ILS, 51Z-4 marker, dual 860E-3 DME, dual DF-203 ADF, 621A-6 transponder, 621A-3 transponder, dual 346B-3 audio system, AVQ-10 radar, and IDC air data system. Rockwell Collins Inc
- [STC SA815SW](https://openairdocs.org/stc/SA815SW): Installation of Collins VOR antenna type 837B-1 on vertical fin. Rockwell Collins Inc

All 264: https://openairdocs.org/aircraft/N234MM/stcs.md

## Related

- Other Grumman G-159 aircraft: https://openairdocs.org/model/grumman-g-159/aircraft.md
- The Rolls-Royce DART-529 series engine: https://openairdocs.org/engine/rolls-royce-dart-529-series.md

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