- Holder
- Fiberglas-Technik Rudolf Lindner GmbH & Co. KG
- Revision
- 4
- Revised
- March 16, 2022
- Status
- Current
- Product
- Aircraft · Glider
- Certification basis
- Part 21
- Models
- 1
- Registered
- 4 aircraft
The release keeps the latest revision of each data sheet. Model names are as the data sheet lists them.
On this page
Models · 1
| Model | Also known as | Note |
|---|---|---|
| G 103 C Twin III SL | Formerly Burkhart Grob Luft-Und |
Airworthiness directives · 8
ADs whose products are models on this data sheet, matched by model and maker.
AD 2025-20-07Rudder Control SystemAD 2022-03-08Elevator Control SystemAD 2009-04-08Bolt torqueAD 2006-08-01Propeller bearing and pulley wheelAD 2005-26-12Center of gravity (CG) release hook attachment brackets.AD 94-17-06Airbrake Stops InspectionAD 2014-15-02HistoricalFlight ControlsAD 97-24-09HistoricalPropeller Bearing And Upper Pulley Wheel
Registered aircraft
Registry models that point at this data sheet, with their registered aircraft.
What the data sheet says
From the PDF’s text layer, line by line: tables lose their columns. The PDF is the record.
DEPARTMENT OF TRANSPORTATION
FEDERAL AVIATION ADMINISTRATION
TYPE CERTIFICATE DATA SHEET No. G57EU
This data sheet which is part of Type Certificate No. G57EU prescribes conditions and limitations under which the product for
which the Type Certificate was issued meets the airworthiness requirements of the Federal Aviation Regulations.
Type Certificate Holder Fiberglas-Technik Rudolf Lindner GmbH & Co. KG
Steige 3
D-88487 Walpertshofen
Germany
Type Certificate Holder Record GROB Aircraft AG transferred TC G57EU to Fiberglas-Technik
Rudolf Lindner GmbH & Co. KG on November 02, 2010.
Grob Aerospace GmbH i.l. transferred TC G57EU to Grob Aircraft
AG on February 2009.
Grob Aerospace GmbH transferred TC G57EU to Grob Aerospace
GmbH i.l. on August 2008.
Burkhart Grob Luft – und Raumfahrt GmbH & Co. KG transferred
TC G57EU to Grob Aerospace GmbH on December 2006.
I. Model G 103 C TWIN III SL (Utility Category), approved February 13, 1992.
Engine Bombardier-ROTAX- Type 505A.
Fuel See Flight Manual Section 2.4.
Engine Limits Max. power
Max. permitted RPM
Max. continuous power
Max. continuous RPM
Max. continuous RPM
43 HP (31.6 KW)
6800 RPM
43 HP (31.6 KW)
6400 RPM (For Propeller 1)
6800 RPM (For Propeller 2)
Propeller and Propeller Limits Propeller 1: MT-Propeller-Entwicklung MTV-24-M/158-16
Propeller 2: Technoflug Leichtflugzeugbau KS-1C-158-R-108
Airspeed Limits. (I.A.S.) Maximum Airspeeds
In Calm Air
Never exceed (VNE) 134 kts 154 mph 248 km/hr
In Rough Air (VRA) 94 kts 109 mph 175 km/hr
Maneuvering (VA) 94 kts 109 mph 175 km/hr
Aero Tow (VT) 76 kts 87 mph 140 km/hr
Winch Tow (VW) 76 kts 87 mph 140 km/hr
Min powerplant extension/
retraction (VPOMIN) 48 kts 56 mph 90 km/hr
Page No. 1 2 3 4
Rev. No. 4 3 4 3
G57EU
Revision 4
Fiberglas-Technik
Rudolf Lindner GmbH & Co. KG
G 103 C TWIN III SL
March 16, 2022
G57EU 2
Max powerplant extension/
retraction (VPOMAX) 59 kts 68 mph 110 km/hr
C.G. Range 11.02 in. to 19.29 in. (280 mm to 490 mm) aft of datum.
Empty Weight C.G. See Maintenance Manual Section 7, Page 6.
Empty Weight 1080 lbs (490 kg).
Datum Wing leading edge at the root rib.
Leveling Means See Maintenance Manual Section 7, Page 3.
Maximum Weight 1565 lbs (710 kg).
Minimum Crew 1 pilot
No. of Seats 2-fixed seats with Seat 1 located 44.57 in. (1132 mm) forward of datum
and Seat 2 located 1.38 in. (35 mm) behind datum.
Baggage Maximum 22 lb. (10 kg) at 31.89 in. (810 mm) aft of datum.
Fuel Capacity Total contents: Fuselage tank 8.7 U.S. gal (33 l)
Wing tank 12.4 U.S. gal (47 l) *
Non-Useable 0.53 U.S. gal ( 2 l)
* Note: As standard only with Propeller 1.
Control Surface Movements Aileron Up 2.95 ± 0.31 in. (radius 8.46 in)
Down 1.97 ± 0.20 in.
The radius is the distance measured from the hingeline of
the aileron at the inboard edge of the aileron.
Elevator Up 4.02 ± 0.31 in. (radius 9.45 in.)
Down 2.91 ± 0.24 in.
The radius is the distance measured from the hingeline of
the elevator at the inboard edge of the elevator.
Rudder Right 9.25 ± 0.39 in. (radius 17.72 in.)
Left 7.87 ± 0.20 in.
The radius is the distance measured from the hingeline of
the rudder at the base of the rudder.
Airbrake
At inner level Up 5.0 in.
Rated Load on Winch and Maximum 935 daN (2061 lbf.).
Auto Tow (Weak Link)
Serial Nos. Eligible As of Serial # 35001
Import Requirements The FAA can issue a U.S. airworthiness certificate based on a German
Airworthiness Authority Export Certificate of Airworthiness (Export C of A)
signed by a representative of the Luftfahrt-Bundesamt (LBA) on behalf of the
European Community. The Export C of A should contain the following
statement: “The aircraft covered by this certificate has been examined, tested,
and found to conform to the type design approved under U.S. Type Certificate
No. G57EU and to be in a condition for safe operation.”
3 G57EU
An airplane maintenance manual in compliance with JAR 22.1529 must be
furnished before delivery of the first airplane or issuance of standard
certificate of airworthiness whichever occurs later.
Refer to the applicable bilateral agreement to verify eligibility for import
into the United States of both new and used aircraft based on the scope of the
agreement, to identify any required statements by the exporting authority on
the export certificate of airworthiness (or equivalent document), and for
procedures for coordinating exceptions to conformity statements on these
documents. Refer to FAA Order 8130.2, Airworthiness Certification of
Aircraft, for requirements for issuance of an airworthiness certificate for
imported aircraft.
Certification Basis 1) 14 CFR Sections 21.29, 21.183(c), and JAR-22 (Joint Airworthiness
Requirements for Sailplanes and Powered Sailplanes), dated 27
June 1989 (Change 4 of the English original edition) including
"Orange Papers" Amendment 22/90/1 dated 12 February 1991 and
Amendment 22/92/1 for propeller 2.
Additional Requirements.
Standards for Structural Substantiation of Sailplane and Powered
Sailplane Components Consisting of Glass or Carbon Fiber
Reinforced Plastics, Issue May 1986.
Standards for the Substantiation of the Electrical System of
Motorgliders, issue 22 November 1990.
Equivalent Level of Safety Findings.
JAR 22.51 (Take-off Speed)
Additional Requirements on Request of the Applicant.
NPA 22G-45, NPA 22D-55
2) Noise Requirements:
Lärmschutzforderungen für Luftfahrzeuge (LSL), Issue 1 January
1991.
3) Section 611(b) of the FAA Act of 1958.
The German Airworthiness Authority, the Luftfahrt-Bundesamt (LBA), originally
type certificated glider Model G103 C TWIN III SL under its Type Certificate Number
869. The FAA validated this product under U.S. Type Certificate Number G57EU.
Effective September 28, 2003, the European Aviation Safety Agency (EASA) began
oversight of this product on behalf of Germany. The EASA TCDS number is
EASA.A.250
Equipment The basic required equipment as prescribed in the applicable airworthiness
regulations (see Certification Basis) must be installed in the airplane for
certification.
Service Information Each of the documents listed below must state that it is approved by
the European Aviation Safety Agency (EASA) or – for approvals
made before September 28, 2003 – by the German Airworthiness
Authority (LBA).
• Service bulletins
• Structural repair manuals
• Vendor manuals
• Aircraft flight manuals
• Overhaul and maintenance manuals
The FAA accepts such documents and considers them FAA-approved
for type design data unless one of the following conditions exist:
• The documents change the limitations, performance, or
procedures of the FAA approved manuals.
G57EU 4
The FAA uses the post type validation procedures to approve these documents.
The FAA may delegate case-by-case approval to EASA on behalf of the FAA
for the U.S. type certificate. If this is the case it will be noted on the document.
Available Documents for GROB Model G 103 C TWIN III SL Series:
Flight Manual (POH) G 103 C TWIN III SL, Issue December 1991, and
subsequent revisions, LBA approved.
Maintenance Manual G 103 C TWIN III SL, including "LBA Approved"
Airworthiness Limitation Section.
Repair Manual G 103 C TWIN III SL
For Engine:
• Manual for ROTAX-Engine Type 505A
• Repair Manual for ROTAX-engine Type 501 and 505
• Spare Parts List for ROTAX Engine Type 505 - 505A, No. 744
For Propeller 1:
• Operation- and Installation Manual No. E-309 Mechanical Variable Pitch
Propeller MTV-24-(),
• Overhaul Manual and Parts List No. E-310 for the Mechanical Variable
Pitch Propeller
For Propeller 2:
• Operation and Installation Manual No. P3 for the Two Blade Composite
Propellers with Fixed Pitch KS 1 G ()()(), KS 1 C ()()(), LBA approved.
Operating Manual for Tow Releases Series E-85 Nose Tow Release, LBA
approved.
Operating Manual for Safety Two Releases Series Europa G 88 Safety Tow
Release, LBA approved.
NOTES
NOTE 1. The placards listed in Section 9 of the Maintenance Manual GROB G 103 C TWIN III SL must be
displayed.
NOTE 2. Service Life Limited components: See Maintenance Manual Section 11.
NOTE 3. All components which are exposed to sunlight (with the exception of the areas for registration marks and
colored warning paint) must have a white surface.
NOTE 4. Removed.
NOTE 5. Motorgliders of this model are certified for flight in accordance with Visual Flight Rules (VFR day).
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