AD 89-08-02
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Burkhart Grob Luft-Und | G103 Twin II | Airworthiness Directives; GROB WERKE GMBH & COMPANY KG (BURKHART GROB) Models G103 TWIN II and G103 A TWIN II ACRO Gliders |
| aircraft | Burkhart Grob Luft-Und | G103A Twin II Acro | Airworthiness Directives; GROB WERKE GMBH & COMPANY KG (BURKHART GROB) Models G103 TWIN II and G103 A TWIN II ACRO Gliders |
Unsafe Condition
Failure of the flight control systems due to weld cracks in the control systems.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 10 hours time-in-service after the AD's effective date, inspect control systems for weld cracks per Grob S/B TM315-37. If cracks found, repair them and modify the glider before further flight. If no cracks, modify the glider within 100 hours time-in-service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 10 hours time-in-service after the effective date of this AD (for inspection); within 100 hours time-in-service after the effective date if no cracks found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
GROB WERKE GMBH & COMPANY KG Models G103 TWIN II and G103 A TWIN II ACRO gliders with serial numbers 3501 through 3878, and 33879 through 34078.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Control Systems
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_89-08-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 89-08-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; GROB WERKE GMBH & COMPANY KG (BURKHART GROB) Models G103 TWIN II and G103 ...Show more Subject: Control Systems Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/27/1989 Make: Burkhart Grob Luft-Und Model: G103 Twin II | G103A Twin II Acro Product Type: Aircraft Product Subtype: Glider Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 89-08-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-6174 AD NUMBER: 89-08-02 SUBJECT HEADING: Airworthiness Directives; GROB WERKE GMBH & COMPANY KG (BURKHART GROB) Models G103 TWIN II and G103 A TWIN II ACRO Gliders ACTION: SUMMARY: DATES: Effective April 27, 1989. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 89-08-02 GROB WERKE GMBH & COMPANY KG (BURKHART GROB): Amendment 39-6174. Applicability: Models G103 TWIN II and G103 A TWIN II ACRO (serial numbers 3501 through 3878, and 33879 through 34078) gliders. Compliance: As indicated in the body of the AD. To preclude failure of the flight control systems, accomplish the following: (a) Within the next 10 hours time-in-service after the effective date of this AD, inspect the control systems for weld cracks in accordance with the instructions contained in Grob Service Bulletin (S/B) TM315-37, dated July 22, 1988. (b) If weld cracks are found per the inspection specified in paragraph (a) of this AD, prior to further flight repair the cracks and modify the glider in accordance with the instructions in the above referenced S/B. (c) If weld cracks are not found per the inspection specified in paragraph (a) of this AD, within the next 100 hours time-in-service after the effective date of this AD, modify the glider in accordance with the instructions in the above referenced S/B. (d) An equivalent means of compliance with this AD may be used if approved by the Manager, Brussels Aircraft Certification Staff, AEU-100, FAA, c/o American Embassy, 15 Rue de la Loi B1040, Brussels, Belgium. All persons affected by this directive may obtain copies of the documents referred to herein upon request to Grob Systems, Incorporated, Aircraft Division, I-75 and Airport Drive, Bluffton, Ohio 45817; or may examine these documents at the FAA, Office of the Assistant Chief Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106. This amendment (39-6174, AD 89-08-02) becomes effective on April 27, 1989. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_89-08-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 89-08-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; GROB WERKE GMBH & COMPANY KG (BURKHART GROB) Models G103 TWIN II and G103 ...Show more Subject: Control Systems Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/27/1989 Make: Burkhart Grob Luft-Und Model: G103 Twin II | G103A Twin II Acro Product Type: Aircraft Product Subtype: Glider Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 89-08-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-6174 AD NUMBER: 89-08-02 SUBJECT HEADING: Airworthiness Directives; GROB WERKE GMBH & COMPANY KG (BURKHART GROB) Models G103 TWIN II and G103 A TWIN II ACRO Gliders ACTION: SUMMARY: DATES: Effective April 27, 1989. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 89-08-02 GROB WERKE GMBH & COMPANY KG (BURKHART GROB): Amendment 39-6174. Applicability: Models G103 TWIN II and G103 A TWIN II ACRO (serial numbers 3501 through 3878, and 33879 through 34078) gliders. Compliance: As indicated in the body of the AD. To preclude failure of the flight control systems, accomplish the following: (a) Within the next 10 hours time-in-service after the effective date of this AD, inspect the control systems for weld cracks in accordance with the instructions contained in Grob Service Bulletin (S/B) TM315-37, dated July 22, 1988. (b) If weld cracks are found per the inspection specified in paragraph (a) of this AD, prior to further flight repair the cracks and modify the glider in accordance with the instructions in the above referenced S/B. (c) If weld cracks are not found per the inspection specified in paragraph (a) of this AD, within the next 100 hours time-in-service after the effective date of this AD, modify the glider in accordance with the instructions in the above referenced S/B. (d) An equivalent means of compliance with this AD may be used if approved by the Manager, Brussels Aircraft Certification Staff, AEU-100, FAA, c/o American Embassy, 15 Rue de la Loi B1040, Brussels, Belgium. All persons affected by this directive may obtain copies of the documents referred to herein upon request to Grob Systems, Incorporated, Aircraft Division, I-75 and Airport Drive, Bluffton, Ohio 45817; or may examine these documents at the FAA, Office of the Assistant Chief Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106. This amendment (39-6174, AD 89-08-02) becomes effective on April 27, 1989. FOOTER:
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Retrieved: Apr 8, 2026
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