AD 66-27-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Allied Ag Cat Productions, Inc. | G-164 | Airworthiness Directives; Grumman Models G-164 and G-164A Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164A | Airworthiness Directives; Grumman Models G-164 and G-164A Airplanes |
Unsafe Condition
Failure of the elevator torque tube due to cracks where the inboard elevator rib is welded to the torque tube and between the two inboard blind rivets.
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Required Actions
Remove two inboard blind rivets, visually inspect the torque tube for cracks, install new rivets if no cracks are found, and modify the torque tube in accordance with Grumman Model G-164 Alert Service Bulletin No. 33 or equivalent. Repeat inspections at intervals not to exceed 100 hours' time in service until modified.
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Compliance Time
Within specified intervals based on time in service as of April 22, 1966: (a) 25 hours' time in service after April 22, 1966, for airplanes with 1,000+ hours; (b) 100 hours' time in service or before 1,025 hours, whichever comes first, for airplanes with 500-999 hours; (c) before 600 hours' time in service for airplanes with less than 500 hours. Inspections must also be repeated at intervals not exceeding 100 hours' time in service until modified.
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Affected Aircraft
Grumman Models G-164 and G-164A Airplanes with elevators having Serial Number 461 and below.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Right-Hand Elevator Torque Tubes
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_66-27-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 66-27-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Grumman Models G-164 and G-164A Airplanes Subject: Right-Hand Elevator Torque Tubes Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/16/1975 Make: Allied Ag Cat Productions, Inc. Model: G-164 | G-164A Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 66-27-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2452 AD NUMBER: 66-27-06 SUBJECT HEADING: Airworthiness Directives; Grumman Models G-164 and G-164A Airplanes ACTION: SUMMARY: DATES: Effective December 16, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 66-27-06 GRUMMAN: Amdt. 39-296 is further amended by Amendment 39-2452. Applies to Models G-164 and G-164A Airplanes that have elevators with Serial Number 461 and Below. Compliance required as indicated. To prevent failure of the elevator torque tube due to cracks, accomplish the following: (a) For airplanes with 1,000 or more hours' time in service on April 22, 1966, comply with (d) within the next 25 hours' time in service after April 22, 1966, and at intervals not to exceed 100 hours' time in service from the last inspection until modified in accordance with (f). (b) For airplanes with 500 or more but less than 1,000 hours' time in service on April 22, 1966, comply with (d) within the next 100 hours' time in service after April 22, 1966, or before the accumulation of 1,025 hours' time in service whichever occurs first, and at intervals not to exceed 100 hours' time in service from the last inspection until modified in accordance with (f). (c) For airplanes with less than 500 hours' time in service on April 22, 1966, comply with (d) before the accumulation of 600 hours' time in service and at intervals not to exceed 100 hours' time in service from the last inspection until modified in accordance with (f). (d) Remove two inboard blind rivets that attach the elevator leading edge skin cover, to the right-hand elevator torque tube. Visually inspect the torque tube for cracks where inboard elevator rib, is welded to the torque tube and between the two inboard blind rivets. If no cracks are found, install new rivets before further flight. If cracks are found, comply with (f) before further flight. (e) Within the next 25 hours in service after the effective date of the amendment, unless already accomplished within the last 75 hours in service, visually inspect the lefthand elevator torque tube for cracks where the inboard rib is welded to the torque tube. This inspection must be repeated at intervals of 100 hours until the aircraft is altered in accordance with paragraph (f). (f) Modify torque tube in accordance with Grumman Model G-164 Alert Service Bulletin No. 33, dated March 8, 1966, or later FAA-approved revision, or an equivalent approved by an FAA Aircraft Engineering Division or Engineering and Manufacturing Branch. This supersedes AD 66-11-01. Amendment 39-296 was effective October 29, 1966. This amendment, 39-2452 is effective December 16, 1975. FOOTER:
Document Text
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AD Final Rules - DRS_66-27-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 66-27-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Grumman Models G-164 and G-164A Airplanes Subject: Right-Hand Elevator Torque Tubes Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/16/1975 Make: Allied Ag Cat Productions, Inc. Model: G-164 | G-164A Product Type: Aircraft Product Subtype: Small 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: 66-27-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2452 AD NUMBER: 66-27-06 SUBJECT HEADING: Airworthiness Directives; Grumman Models G-164 and G-164A Airplanes ACTION: SUMMARY: DATES: Effective December 16, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 66-27-06 GRUMMAN: Amdt. 39-296 is further amended by Amendment 39-2452. Applies to Models G-164 and G-164A Airplanes that have elevators with Serial Number 461 and Below. Compliance required as indicated. To prevent failure of the elevator torque tube due to cracks, accomplish the following: (a) For airplanes with 1,000 or more hours' time in service on April 22, 1966, comply with (d) within the next 25 hours' time in service after April 22, 1966, and at intervals not to exceed 100 hours' time in service from the last inspection until modified in accordance with (f). (b) For airplanes with 500 or more but less than 1,000 hours' time in service on April 22, 1966, comply with (d) within the next 100 hours' time in service after April 22, 1966, or before the accumulation of 1,025 hours' time in service whichever occurs first, and at intervals not to exceed 100 hours' time in service from the last inspection until modified in accordance with (f). (c) For airplanes with less than 500 hours' time in service on April 22, 1966, comply with (d) before the accumulation of 600 hours' time in service and at intervals not to exceed 100 hours' time in service from the last inspection until modified in accordance with (f). (d) Remove two inboard blind rivets that attach the elevator leading edge skin cover, to the right-hand elevator torque tube. Visually inspect the torque tube for cracks where inboard elevator rib, is welded to the torque tube and between the two inboard blind rivets. If no cracks are found, install new rivets before further flight. If cracks are found, comply with (f) before further flight. (e) Within the next 25 hours in service after the effective date of the amendment, unless already accomplished within the last 75 hours in service, visually inspect the lefthand elevator torque tube for cracks where the inboard rib is welded to the torque tube. This inspection must be repeated at intervals of 100 hours until the aircraft is altered in accordance with paragraph (f). (f) Modify torque tube in accordance with Grumman Model G-164 Alert Service Bulletin No. 33, dated March 8, 1966, or later FAA-approved revision, or an equivalent approved by an FAA Aircraft Engineering Division or Engineering and Manufacturing Branch. This supersedes AD 66-11-01. Amendment 39-296 was effective October 29, 1966. This amendment, 39-2452 is effective December 16, 1975. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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