AD 75-16-22
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H.114 Heron Series 2A | Airworthiness Directives; de Havilland Model DH-114 Airplanes |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H.114 Heron Series 2DA | Airworthiness Directives; de Havilland Model DH-114 Airplanes |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H.114 Heron Series 2X | Airworthiness Directives; de Havilland Model DH-114 Airplanes |
Unsafe Condition
Excessive wear of the counterweight bushings and subsequent ineffectiveness of the counterweight function.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect and replace, if required, crankshaft counterweight pins and bushings in accordance with Teledyne Continental Overhaul Manual X-30039 or an equivalent procedure approved by the Chief, Engineering and Manufacturing Branch.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 200 hours' time in service after the effective date of this AD, unless already accomplished within the last 1500 hours' time in service, and thereafter at intervals not to exceed 1500 hours' time in service from the last inspection
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
De Havilland Aircraft Co., Ltd., Model D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA, D.H.114 Heron Series 2X airplanes modified in accordance with Supplemental Type Certificate (STC) SA1685WE
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Counterweight Bushings
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_75-16-22.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-16-22 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; de Havilland Model DH-114 Airplanes Subject: Counterweight Bushings Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/08/1975 Make: de Havilland Aircraft Co., Ltd., The Model: D.H.114 Heron Series 2A | D.H.114 Heron Series 2DA | D.H.114 Heron Series 2X Product Type: Aircraft Product Subtype: Small/Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 75-16-22 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2298 AD NUMBER: 75-16-22 SUBJECT HEADING: Airworthiness Directives; de Havilland Model DH-114 Airplanes ACTION: SUMMARY: DATES: Effective August 8, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-16-22 DeHAVILLAND DH-114: Amendment 39-2298. Applies to all DeHavilland Model DH-114 airplanes modified in accordance with Supplemental Type Certificate (STC) SA1685WE. Compliance required within the next 200 hours' time in service after the effective date of this AD, unless already accomplished within the last 1500 hours' time in service, and thereafter at intervals not to exceed 1500 hours' time in service from the last inspection. To prevent excessive wear of the counterweight bushings and subsequent ineffectiveness of the counterweight function, accomplish the following: Inspect and replace, if required, crankshaft counterweight pins and bushings in accordance with Teledyne Continental Overhaul Manual X-30039 or an equivalent procedure approved by the Chief, Engineering and Manufacturing Branch, ASO-210, P.O. Box 20636, Atlanta, Georgia 30320. This amendment becomes effective August 8, 1975. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_75-16-22.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-16-22 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; de Havilland Model DH-114 Airplanes Subject: Counterweight Bushings Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/08/1975 Make: de Havilland Aircraft Co., Ltd., The Model: D.H.114 Heron Series 2A | D.H.114 Heron Series 2DA | D.H.114 Heron Series 2X Product Type: Aircraft Product Subtype: Small/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: 75-16-22 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2298 AD NUMBER: 75-16-22 SUBJECT HEADING: Airworthiness Directives; de Havilland Model DH-114 Airplanes ACTION: SUMMARY: DATES: Effective August 8, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-16-22 DeHAVILLAND DH-114: Amendment 39-2298. Applies to all DeHavilland Model DH-114 airplanes modified in accordance with Supplemental Type Certificate (STC) SA1685WE. Compliance required within the next 200 hours' time in service after the effective date of this AD, unless already accomplished within the last 1500 hours' time in service, and thereafter at intervals not to exceed 1500 hours' time in service from the last inspection. To prevent excessive wear of the counterweight bushings and subsequent ineffectiveness of the counterweight function, accomplish the following: Inspect and replace, if required, crankshaft counterweight pins and bushings in accordance with Teledyne Continental Overhaul Manual X-30039 or an equivalent procedure approved by the Chief, Engineering and Manufacturing Branch, ASO-210, P.O. Box 20636, Atlanta, Georgia 30320. This amendment becomes effective August 8, 1975. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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Related Airworthiness Directives
84-20-04
final ruleAirworthiness Directives; British Aerospace Model DH-114 Heron series 2A, 2DA, and 2X Series Airplanes
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81-21-03
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76-16-03
final ruleAirworthiness Directives; Hawker Siddeley Aviation Limited Model DH-114 Heron Airplanes
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77-15-13
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Unsafe Condition: Possible seizure of the main landing gear damper ram, P/N AC11164, leading to consequent damage to the aircraft upon landing.
