AD 86-15-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Burkhart Grob Luft-Und | GROB G 109B | Airworthiness Directives; GROB-WERKE GMBH Model Grob G 109B Motorgliders |
Unsafe Condition
Aileron flutter could result in loss of control of the motorglider.
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Required Actions
Attach a placard on the instrument panel with specified wording, place a copy of this AD in the flight manual's limitation section, and modify the motorglider by installing a rudder damper, additional aileron mass-balance, and stiffening rudder hinge attachment points as per specified documents. Equivalent compliance may be approved.
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Compliance Time
Within the next 5 hours time-in-service after the effective date of this AD.
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Affected Aircraft
GROB-WERKE GMBH Model Grob G 109B motorgliders (serial numbers 6200 through 6430 inclusive)
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Federal Register Abstract
Placard-Limitation Section
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_86-15-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 86-15-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; GROB-WERKE GMBH Model Grob G 109B Motorgliders Subject: Placard-Limitation Section Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/31/1986 Make: Burkhart Grob Luft-Und Model: GROB G 109B Product Type: Aircraft Product Subtype: Glider Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 86-15-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5356 AD NUMBER: 86-15-09 SUBJECT HEADING: Airworthiness Directives; GROB-WERKE GMBH Model Grob G 109B Motorgliders ACTION: SUMMARY: DATES: Effective July 31, 1986. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 86-15-09 GROB-WERKE GMBH: Amendment 39-5356. Applies to Model Grob G 109B motorgliders (serial numbers 6200 through 6430 inclusive) certificated in any category. Compliance is required as indicated, unless already accomplished. To prevent the possibility of encountering aileron flutter which could result in the loss of control of the motorglider, accomplish the following: (a) Within the next 5 hours time-in-service after the effective date of this AD: (1) Attach a placard on the instrument panel adjacent to the airspeed indicator with the following wording: "NEVER EXCEED AIRSPEED (IAS): 190 km/h (100 kts)." (2) Place a copy of this AD in the limitation section of the flight manual. (b) Modification of the motorglider, by installing a rudder damper, additional mass- balance to the ailerons, and stiffening the upper and lower rudder hinge attachment points on the vertical tail, in accordance with the "Instructions" section of GROB-Werke GmbH Technical Information No. TM 817-20 dated Jan. 29, 1986, and GROB-WERKE GmbH Repair Instruction No.'s 817-20/1, 817-20/2, 817-20/3, dated Jan. 29, 1986, deletes the requirement for compliance with Paragraph (a). Upon request, an equivalent means of compliance with the requirements of this AD may be approved by the Manager, Brussels Aircraft Certification Office, AEU-100, Europe, Africa, and Middle East Office, FAA, c/o American Embassy, 15 Rue de la Loi, B-1040 Brussels, Belgium, telephone no. 513.38.30 ext. 2710 or the Manager, New York Aircraft Certification Office, Aircraft Certification Division, FAA, New England Region, 181 South Franklin Avenue, Room 202, Valley Stream, New York 11581, telephone no. 516-791-6680. Upon submission of substantiating data by an owner or operator through an FAA maintenance inspector, the Manager, Brussels Aircraft Certification Office, or the Manager, New York Aircraft Certification Office, may adjust the compliance time specified in this AD. Grob-Werke GmbH Technical Information No. 817-20, dated Jan. 29, 1986, and Grob- Werke GmbH Repair Instructions Nos. 817-20/1, 817-20/2, 817-20/3, dated Jan. 29, 1986, identified and described in this document, are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Grob Systems Inc., Aircraft Division, I-75 and Airport Drive, Bluffton, Ohio 45817. These documents also may be examined at the Office of Regional Counsel, FAA, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803, Room 311, Rules Docket 86-ANE- 29, between the hours of 8:00 a.m. and 4:30 p.m., Monday through Friday, except Federal holidays. This amendment becomes effective on July 31, 1986. FOOTER:
Document Text
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AD Final Rules - DRS_86-15-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 86-15-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; GROB-WERKE GMBH Model Grob G 109B Motorgliders Subject: Placard-Limitation Section Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/31/1986 Make: Burkhart Grob Luft-Und Model: GROB G 109B 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: 86-15-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5356 AD NUMBER: 86-15-09 SUBJECT HEADING: Airworthiness Directives; GROB-WERKE GMBH Model Grob G 109B Motorgliders ACTION: SUMMARY: DATES: Effective July 31, 1986. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 86-15-09 GROB-WERKE GMBH: Amendment 39-5356. Applies to Model Grob G 109B motorgliders (serial numbers 6200 through 6430 inclusive) certificated in any category. Compliance is required as indicated, unless already accomplished. To prevent the possibility of encountering aileron flutter which could result in the loss of control of the motorglider, accomplish the following: (a) Within the next 5 hours time-in-service after the effective date of this AD: (1) Attach a placard on the instrument panel adjacent to the airspeed indicator with the following wording: "NEVER EXCEED AIRSPEED (IAS): 190 km/h (100 kts)." (2) Place a copy of this AD in the limitation section of the flight manual. (b) Modification of the motorglider, by installing a rudder damper, additional mass- balance to the ailerons, and stiffening the upper and lower rudder hinge attachment points on the vertical tail, in accordance with the "Instructions" section of GROB-Werke GmbH Technical Information No. TM 817-20 dated Jan. 29, 1986, and GROB-WERKE GmbH Repair Instruction No.'s 817-20/1, 817-20/2, 817-20/3, dated Jan. 29, 1986, deletes the requirement for compliance with Paragraph (a). Upon request, an equivalent means of compliance with the requirements of this AD may be approved by the Manager, Brussels Aircraft Certification Office, AEU-100, Europe, Africa, and Middle East Office, FAA, c/o American Embassy, 15 Rue de la Loi, B-1040 Brussels, Belgium, telephone no. 513.38.30 ext. 2710 or the Manager, New York Aircraft Certification Office, Aircraft Certification Division, FAA, New England Region, 181 South Franklin Avenue, Room 202, Valley Stream, New York 11581, telephone no. 516-791-6680. Upon submission of substantiating data by an owner or operator through an FAA maintenance inspector, the Manager, Brussels Aircraft Certification Office, or the Manager, New York Aircraft Certification Office, may adjust the compliance time specified in this AD. Grob-Werke GmbH Technical Information No. 817-20, dated Jan. 29, 1986, and Grob- Werke GmbH Repair Instructions Nos. 817-20/1, 817-20/2, 817-20/3, dated Jan. 29, 1986, identified and described in this document, are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Grob Systems Inc., Aircraft Division, I-75 and Airport Drive, Bluffton, Ohio 45817. These documents also may be examined at the Office of Regional Counsel, FAA, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803, Room 311, Rules Docket 86-ANE- 29, between the hours of 8:00 a.m. and 4:30 p.m., Monday through Friday, except Federal holidays. This amendment becomes effective on July 31, 1986. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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