# N4601M: Burkhart Grob G 103 TWIN II

- Status: Valid registration
- Airframe: [Burkhart Grob G 103 TWIN II](https://openairdocs.org/model/burkhart-grob-g-103-twin-ii) (registry code 1660203, 2 seats)
- Data sheets: [TCDS G39EU](https://openairdocs.org/tcds/G39EU) (Fiberglas-Technik Rudolf Lindner GmbH & Co. KG) (OpenAirDocs)
- Serial number: 3831
- Type: Glider
- Engine type: None
- Airworthiness: Standard, glider
- Airworthiness date: January 19, 1984
- Certificate issued: December 15, 2020
- Expires: December 31, 2027
- Mode S code: A59C22
- Registered owner: [Southern California Soaring Academy Inc](https://openairdocs.org/faa-owner/SOUTHERN%20CALIFORNIA%20SOARING%20ACADEMY%20INC)
- Location: [Valencia, CA](https://openairdocs.org/faa-place/CA/Valencia)
- Owner type: Corporation
- Owner's area on the map: 34.4019° N, 118.5700° W: Placed by OpenAirDocs at the center of ZIP code 91355, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4601M
- Page: https://openairdocs.org/aircraft/N4601M

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.

## ADs that may apply (OpenAirDocs): 15 in force

### Matched by airframe (Burkhart Grob G 103 TWIN II)

- [AD 2025-20-07](https://openairdocs.org/ad/2025-20-07): Rudder Control System · Fiberglas-Technik Rudolf Lindner G103 Twin II, G103A Twin II Acro, G103C Twin III Acro and 1 more. Effective Oct 17, 2025
- [AD 2022-03-08](https://openairdocs.org/ad/2022-03-08): Elevator Control System · Fiberglas-Technik Rudolf Lindner G102 ASTIR CS, G103 Twin Astir, G103 Twin II and 3 more. Effective Mar 17, 2022
- [AD 2015-22-04](https://openairdocs.org/ad/2015-22-04): Flight Controls · Fiberglas-Technik Rudolf Lindner G103 Twin Astir, G103 Twin II and G103A Twin II Acro. Effective Dec 4, 2015
- [AD 2009-04-08](https://openairdocs.org/ad/2009-04-08): Bolt torque · Burkhart Grob Luft-Und G 103 C Twin III SL, G103 Twin II, G103A Twin II Acro and 1 more. Effective Mar 31, 2009
- [AD 2005-26-12](https://openairdocs.org/ad/2005-26-12): Center of gravity (CG) release hook attachment brackets. · Burkhart Grob Luft-Und G 103 C Twin III SL, G103 Twin Astir, G103 Twin II and 2 more. Effective Feb 6, 2006
- [AD 99-20-11](https://openairdocs.org/ad/99-20-11): Fastening Nut At Rear Control Stick · Burkhart Grob Luft-Und G103 Twin II and G103A Twin II Acro. Effective Oct 21, 1999
- [AD 97-08-06 R1](https://openairdocs.org/ad/97-08-06-R1): Quick Connectors · Alexander Schleicher AS-K 13, AS 12, ASK 21 and 39 more. Effective Aug 1, 1997
- [AD 94-17-06](https://openairdocs.org/ad/94-17-06): Airbrake Stops Inspection · Burkhart Grob Luft-Und G 103 C Twin III SL, G103 Twin Astir, G103 Twin II and 8 more. Effective Sep 30, 1994
- [AD 91-02-04](https://openairdocs.org/ad/91-02-04): Aileron Control System · Burkhart Grob Luft-Und G103 Twin Astir, G103 Twin II and G103A Twin II Acro. Effective Feb 8, 1991
- [AD 90-02-09](https://openairdocs.org/ad/90-02-09): Wing Spar Spigots · Burkhart Grob Luft-Und G103 Twin Astir, G103 Twin II and G103A Twin II Acro. Effective Feb 5, 1990
- [AD 89-08-02](https://openairdocs.org/ad/89-08-02): Control Systems · Burkhart Grob Luft-Und G103 Twin II and G103A Twin II Acro. Effective Apr 27, 1989
- [AD 88-12-08](https://openairdocs.org/ad/88-12-08): Tow-Hook Knob · Burkhart Grob Luft-Und G103 Twin Astir, G103 Twin II and G103A Twin II Acro. Effective Jun 9, 1988
- [AD 87-25-10](https://openairdocs.org/ad/87-25-10): Rudder Lever · Burkhart Grob Luft-Und G103 Twin II and G103A Twin II Acro. Effective Apr 15, 1988
- [AD 86-17-08](https://openairdocs.org/ad/86-17-08): Airbrake Pivot Lever Stop Pad · Burkhart Grob Luft-Und G103 Twin II and G103A Twin II Acro. Effective Sep 10, 1986
- [AD 86-16-02](https://openairdocs.org/ad/86-16-02): Inspect Airbrake Operating Lever · Burkhart Grob Luft-Und G103 Twin II and G103A Twin II Acro. Effective Aug 8, 1986

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

- [AD 2014-15-02](https://openairdocs.org/ad/2014-15-02) (historical): Flight Controls · Burkhart Grob Luft-Und G 103 C Twin III SL, G103 Twin II, G103A Twin II Acro and 4 more. Effective Aug 27, 2014
- [AD 2004-08-13](https://openairdocs.org/ad/2004-08-13) (historical): Center of gravity release hook attachment brackets · Burkhart Grob Luft-Und G103 Twin Astir, G103 Twin II, G103A Twin II Acro and 1 more. Effective Jun 4, 2004

## Information bulletins (advisory) (2 in force)

- [SAIB CE-08-01](https://openairdocs.org/saib/CE-08-01): Fuselage, Wing, & Stabilizer Structure. Issued Oct 18, 2007
- [SAIB CE-06-49](https://openairdocs.org/saib/CE-06-49): . Issued Jun 21, 2006

## NTSB investigations (1)

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 LAX06CA081](https://openairdocs.org/ntsb/LAX06CA081), Dec 3, 2005: Burkhart Grob G 103 Twin II (N4601M), Llano, CA, substantial damage. Probable cause: The flight's encounter with downdrafts. A contributing factor was the unsuitable vegetation-covered mountainous terrain.

## FAA accident and incident reports (3)

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 20051203031529A](https://openairdocs.org/incident/20051203031529A), Dec 3, 2005: Grob G103ATWIN2 (N4601M), Wrightwood, CA, Substantial damage. (-23) On December 3, 2005, at approximately 1430 hours PST, N4601M, a Grob G-103, two place glider, departed on aerotow from crystal airport (46CN) on a…
- [Incident 20000809025599I](https://openairdocs.org/incident/20000809025599I), Aug 9, 2000: Grob G103ATWIN2 (N4601M), Llano, CA, Minor damage. (-23) At approx. 1205, Wednesday, 08/09/00, at Crystal Airport, L01, llana, CA. The pilot of N4601M, a GROB0G103-TWIN2, landed short of the runway hitting a…
- [Incident 19860817048129I](https://openairdocs.org/incident/19860817048129I), Aug 17, 1986: N4601M, Llano, CA, Minor damage. Allowed a wing tip to touch ground too early on landing. Veered off the runway and struck a fence.

## 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)

None matched to this aircraft's models.

## Earlier aircraft with N4601M

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N4601M before.

- [Cancelled 1980-08-13](https://openairdocs.org/deregistered/N4601M-1980-08-13): Cessna 152, S/N 15284470, built 1980. Exported to Japan. Owner: [Cessna Aircraft Co](https://openairdocs.org/faa-owner/CESSNA%20AIRCRAFT%20CO), [Wichita, KS](https://openairdocs.org/faa-place/KS/Wichita)
- [Cancelled 1970-06-22](https://openairdocs.org/deregistered/N4601M-1970-06-22): Piper PA-11, S/N 11-105. Owner: [Southmost Aviation Inc](https://openairdocs.org/faa-owner/SOUTHMOST%20AVIATION%20INC), [Brownsville, TX](https://openairdocs.org/faa-place/TX/Brownsville)

## Related

- Other Burkhart Grob G 103 TWIN II aircraft: https://openairdocs.org/model/burkhart-grob-g-103-twin-ii/aircraft.md

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