AD 83-24-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-7-1 | Airworthiness Directives; DeHavilland Model DHC-7 Airplanes |
| aircraft | Viking Air Limited | DHC-7-100 | Airworthiness Directives; DeHavilland Model DHC-7 Airplanes |
| aircraft | Viking Air Limited | DHC-7-101 | Airworthiness Directives; DeHavilland Model DHC-7 Airplanes |
| aircraft | Viking Air Limited | DHC-7-102 | Airworthiness Directives; DeHavilland Model DHC-7 Airplanes |
| aircraft | Viking Air Limited | DHC-7-103 | Airworthiness Directives; DeHavilland Model DHC-7 Airplanes |
Unsafe Condition
Loss of trimability and partial loss of pitch control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Incorporate Modification Numbers 7/2209 on each elevator and 7/2211 and 7/2216 on the tailplane per Service Bulletin 7-55-6, Rev. B. Alternate means of compliance may be used if approved by the FAA. Special flight permits may be issued under FAR 21.197 and 21.199.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 750 flight hours or three months after effective date of this AD, whichever occurs first
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
DeHavilland Model DHC-7 airplanes, Serial Numbers 3 through 92 inclusive.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Trimability and Pitch Control
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_83-24-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 83-24-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DeHavilland Model DHC-7 Airplanes Subject: Trimability and Pitch Control Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/21/1983 Make: Viking Air Limited Model: DHC-7-1 | DHC-7-100 | DHC-7-101 | DHC-7-102 | DHC-7-103 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 83-24-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4781 AD NUMBER: 83-24-09 SUBJECT HEADING: Airworthiness Directives; DeHavilland Model DHC-7 Airplanes ACTION: SUMMARY: DATES: Effective December 21, 1983. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 83-24-09 DeHAVILLAND AIRCRAFT OF CANADA, LTD.: Amendment 39-4781. Applies to DeHavilland Model DHC-7 airplanes, Serial Numbers 3 through 92 inclusive. Compliance is required within the next 750 flight hours or three months after effective date of this AD, whichever occurs first, unless previously accomplished. To protect against loss of trimability and partial loss of pitch control, accomplish the following: 1. Incorporate Modification Number 7/2209 on each elevator and Modification Numbers 7/2211 and 7/2216 on the tailplane in accordance with instruction contained in DeHavilland Service Bulletin No. 7-55-6, Rev. B, dated September 17, 1982. 2. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. 3. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and/or modifications as required by this AD. This amendment becomes effective December 21, 1983. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_83-24-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 83-24-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DeHavilland Model DHC-7 Airplanes Subject: Trimability and Pitch Control Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/21/1983 Make: Viking Air Limited Model: DHC-7-1 | DHC-7-100 | DHC-7-101 | DHC-7-102 | DHC-7-103 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: 83-24-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4781 AD NUMBER: 83-24-09 SUBJECT HEADING: Airworthiness Directives; DeHavilland Model DHC-7 Airplanes ACTION: SUMMARY: DATES: Effective December 21, 1983. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 83-24-09 DeHAVILLAND AIRCRAFT OF CANADA, LTD.: Amendment 39-4781. Applies to DeHavilland Model DHC-7 airplanes, Serial Numbers 3 through 92 inclusive. Compliance is required within the next 750 flight hours or three months after effective date of this AD, whichever occurs first, unless previously accomplished. To protect against loss of trimability and partial loss of pitch control, accomplish the following: 1. Incorporate Modification Number 7/2209 on each elevator and Modification Numbers 7/2211 and 7/2216 on the tailplane in accordance with instruction contained in DeHavilland Service Bulletin No. 7-55-6, Rev. B, dated September 17, 1982. 2. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. 3. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and/or modifications as required by this AD. This amendment becomes effective December 21, 1983. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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