AD 76-18-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Gulfstream Aerospace Corporation | G-1159 | Airworthiness Directives; GRUMMAN AMERICAN AVIATION CORPORATION Model G-1159 Airplanes |
Unsafe Condition
Loose terminal connections at the generator terminal boards and associated wiring connections could lead to arcing and failure of the generator system.
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Required Actions
Modify engine electrical junction boxes to provide access holes for inspecting generator terminal boards and wiring connections. Inspect terminals for secure lock washers and torque stripes, reinspect every 300 hours time in service until basic modification is done. Replace loose components with self-locking nuts and washers during engine removal.
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Compliance Time
within the next 100 hours time in service after the effective date of this AD, unless already accomplished
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Affected Aircraft
GRUMMAN AMERICAN AVIATION CORPORATION Model G-1159 airplanes, serial numbers 1 through 154 and 775
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Federal Register Abstract
Generator Terminals
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_76-18-12.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 76-18-12 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; GRUMMAN AMERICAN AVIATION CORPORATION Model G-1159 Airplanes Subject: Generator Terminals Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/22/1976 Make: Gulfstream Aerospace Corporation Model: G-1159 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 76-18-12 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2721 AD NUMBER: 76-18-12 SUBJECT HEADING: Airworthiness Directives; GRUMMAN AMERICAN AVIATION CORPORATION Model G-1159 Airplanes ACTION: SUMMARY: DATES: Effective September 22, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 76-18-12 GRUMMAN AMERICAN AVIATION CORPORATION: Amendment 39- 2721. Applies to Model G-1159 airplanes certificated in all categories, serial numbers 1 through 154 and 775. Compliance required within the next 100 hours time in service after the effective date of this AD, unless already accomplished. To detect loose terminal connections at the generator terminal boards and to prevent the loosening of these connections, accomplish the following: 1. Modify each engine electrical junction box to provide an access hole for inspecting the two generator terminal boards and the eight associated wiring connections. Grumman American Aircraft Service Change No. 203 Amendments 1 and 2 provide the information for accomplishing this modification. 2. If the inspection reveals that all generator terminals are secure, i.e., that all lock washers are compressed and torque stripes not broken, the connections are satisfactory. 3. Reinspect in accordance with A.S.C. No. 203 Amendments 1 and 2 in intervals of 300 hours time in service until the basic A.S.C. No. 203 has been accomplished. 4. If the lock washer on any terminal is found not to be compressed, or evidence of arcing at any connection is noted, the affected engine shall be removed and the basic A.S.C. No. 203 accomplished to the corresponding engine junction box. 5. The reinspection procedure must continue for the remaining engine junction box until the basic A.S.C. No. 203 has been accomplished. This service change requires the removal of a plain nut, a plain washer, and lockwasher from each generator terminal, and replacing them with a self-locking nut and a plain washer. 6. Compliance with the basic A.S.C. No. 203 must be accomplished at the next engine removal, if not done prior to that time. This Airworthiness Directive may be accomplished by any other means approved by the Chief, Engineering and Manufacturing Branch of the Southern Region, Atlanta, Georgia. This amendment becomes effective September 22, 1976. FOOTER:
Document Text
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AD Final Rules - DRS_76-18-12.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 76-18-12 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; GRUMMAN AMERICAN AVIATION CORPORATION Model G-1159 Airplanes Subject: Generator Terminals Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/22/1976 Make: Gulfstream Aerospace Corporation Model: G-1159 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 76-18-12 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2721 AD NUMBER: 76-18-12 SUBJECT HEADING: Airworthiness Directives; GRUMMAN AMERICAN AVIATION CORPORATION Model G-1159 Airplanes ACTION: SUMMARY: DATES: Effective September 22, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 76-18-12 GRUMMAN AMERICAN AVIATION CORPORATION: Amendment 39- 2721. Applies to Model G-1159 airplanes certificated in all categories, serial numbers 1 through 154 and 775. Compliance required within the next 100 hours time in service after the effective date of this AD, unless already accomplished. To detect loose terminal connections at the generator terminal boards and to prevent the loosening of these connections, accomplish the following: 1. Modify each engine electrical junction box to provide an access hole for inspecting the two generator terminal boards and the eight associated wiring connections. Grumman American Aircraft Service Change No. 203 Amendments 1 and 2 provide the information for accomplishing this modification. 2. If the inspection reveals that all generator terminals are secure, i.e., that all lock washers are compressed and torque stripes not broken, the connections are satisfactory. 3. Reinspect in accordance with A.S.C. No. 203 Amendments 1 and 2 in intervals of 300 hours time in service until the basic A.S.C. No. 203 has been accomplished. 4. If the lock washer on any terminal is found not to be compressed, or evidence of arcing at any connection is noted, the affected engine shall be removed and the basic A.S.C. No. 203 accomplished to the corresponding engine junction box. 5. The reinspection procedure must continue for the remaining engine junction box until the basic A.S.C. No. 203 has been accomplished. This service change requires the removal of a plain nut, a plain washer, and lockwasher from each generator terminal, and replacing them with a self-locking nut and a plain washer. 6. Compliance with the basic A.S.C. No. 203 must be accomplished at the next engine removal, if not done prior to that time. This Airworthiness Directive may be accomplished by any other means approved by the Chief, Engineering and Manufacturing Branch of the Southern Region, Atlanta, Georgia. This amendment becomes effective September 22, 1976. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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