AD 86-07-06
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-100 Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-100B Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-100B SUD Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200B Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200C Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200F Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-300 Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400 Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747SP Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747SR Series | BOEING Model 747 Series Airplanes |
Unsafe Condition
Failure of the forward lug of an inboard pylon upper link.
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Required Actions
Perform a close visual or ultrasonic inspection of the forward lug of the inboard pylon upper link for cracks in accordance with Boeing Service Bulletin 747-54-2111, Revision 1. Replace or modify cracked parts prior to further flight. Repetitive inspections must be conducted at intervals of 850 landings (if prior inspection was visual) or 1,700 landings (if prior inspection was ultrasonic).
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 850 landings after the effective date of this AD or prior to the accumulation of 8,000 landings, whichever occurs later
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 747 series airplanes listed in Boeing Service Bulletin 747-54-2111, Revision 1, dated November 22, 1985.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Inboard Pylon Upper Link - Forward Lug
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_86-07-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 86-07-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Model 747 Series Airplanes Subject: Inboard Pylon Upper Link - Forward Lug Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/08/1986 Make: The Boeing Company Model: 747-100 Series | 747-100B Series | 747-100B SUD Series | 747-200B Series | 747-200C Series | 747-200...Show more 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: 86-07-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5270 AD NUMBER: 86-07-06 SUBJECT HEADING: BOEING Model 747 Series Airplanes ACTION: SUMMARY: DATES: Effective May 8, 1986. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 86-07-06 BOEING: Amendment 39-5270. Applies to Model 747 series airplanes, listed in Boeing Service Bulletin 747-54-2111, Revision 1, dated November 22, 1985, certificated in any category. To prevent failure of the forward lug of an inboard pylon upper link, accomplish the following, unless already accomplished: A. Within the next 850 landings after the effective date of this AD or prior to the accumulation of 8,000 landings, whichever occurs later, perform a close visual or ultrasonic inspection of the forward lug of the inboard pylon upper link for cracks in accordance with Boeing Service Bulletin 747-54-2111, Revision 1, dated November 22, 1985, or later FAA- approved revision. NOTE: Definition of close visual (detailed) inspection method: Close intensive visual inspections of highly defined structural details or locations searching for evidence of structural irregularity. Using adequate lighting and where necessary, inspection aids such as mirrors, etc., surface cleaning and access procedures may be required to gain proximity. B. Cracked parts must be replaced or modified prior to further flight. The part may be modified, if cracking is within rework limits, by the installation of bushings of a new design in accordance with Boeing Service Bulletin 747-54-2111, Revision 1, dated November 22, 1985, or later FAA-approved revision. C. If no cracks are found, perform repetitive inspections, as described in paragraph A., above, at the following intervals: 1. If the immediately prior inspection was a close visual inspection, reinspect within the next 850 landings. 2. If the immediately prior inspection was an ultrasonic inspection, reinspect within the next 1,700 landings. D. Installation of inboard pylon upper links that have been modified in accordance with Boeing Service Bulletin 747-54-2111, Revision 1, dated November 22, 1985, or later FAA- approved revision, is considered to be terminating action for the requirements of this AD. E. Compliance with this AD does not terminate the inspection requirements of the Supplemental Structural Inspection Document (SSID) Airworthiness Directive AD 84-21-02 (Amdt. 39-4936; 49 FR 44890), if applicable. F. Upon the request of an operator, an FAA Principal Maintenance Inspector, subject to prior approval of the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region, may adjust the inspection times specified in this AD to permit compliance at an established inspection period of that operator, if the request contains substantiating data to justify the change for that operator. G. Alternate means of compliance which provide an acceptable level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. H. 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 required by this AD. All persons affected by this proposal who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to the Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124-2207. These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington. This amendment becomes effective May 8, 1986. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_86-07-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 86-07-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Model 747 Series Airplanes Subject: Inboard Pylon Upper Link - Forward Lug Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/08/1986 Make: The Boeing Company Model: 747-100 Series | 747-100B Series | 747-100B SUD Series | 747-200B Series | 747-200C Series | 747-200...Show more 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: 86-07-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5270 AD NUMBER: 86-07-06 SUBJECT HEADING: BOEING Model 747 Series Airplanes ACTION: SUMMARY: DATES: Effective May 8, 1986. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 86-07-06 BOEING: Amendment 39-5270. Applies to Model 747 series airplanes, listed in Boeing Service Bulletin 747-54-2111, Revision 1, dated November 22, 1985, certificated in any category. To prevent failure of the forward lug of an inboard pylon upper link, accomplish the following, unless already accomplished: A. Within the next 850 landings after the effective date of this AD or prior to the accumulation of 8,000 landings, whichever occurs later, perform a close visual or ultrasonic inspection of the forward lug of the inboard pylon upper link for cracks in accordance with Boeing Service Bulletin 747-54-2111, Revision 1, dated November 22, 1985, or later FAA- approved revision. NOTE: Definition of close visual (detailed) inspection method: Close intensive visual inspections of highly defined structural details or locations searching for evidence of structural irregularity. Using adequate lighting and where necessary, inspection aids such as mirrors, etc., surface cleaning and access procedures may be required to gain proximity. B. Cracked parts must be replaced or modified prior to further flight. The part may be modified, if cracking is within rework limits, by the installation of bushings of a new design in accordance with Boeing Service Bulletin 747-54-2111, Revision 1, dated November 22, 1985, or later FAA-approved revision. C. If no cracks are found, perform repetitive inspections, as described in paragraph A., above, at the following intervals: 1. If the immediately prior inspection was a close visual inspection, reinspect within the next 850 landings. 2. If the immediately prior inspection was an ultrasonic inspection, reinspect within the next 1,700 landings. D. Installation of inboard pylon upper links that have been modified in accordance with Boeing Service Bulletin 747-54-2111, Revision 1, dated November 22, 1985, or later FAA- approved revision, is considered to be terminating action for the requirements of this AD. E. Compliance with this AD does not terminate the inspection requirements of the Supplemental Structural Inspection Document (SSID) Airworthiness Directive AD 84-21-02 (Amdt. 39-4936; 49 FR 44890), if applicable. F. Upon the request of an operator, an FAA Principal Maintenance Inspector, subject to prior approval of the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region, may adjust the inspection times specified in this AD to permit compliance at an established inspection period of that operator, if the request contains substantiating data to justify the change for that operator. G. Alternate means of compliance which provide an acceptable level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. H. 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 required by this AD. All persons affected by this proposal who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to the Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124-2207. These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington. This amendment becomes effective May 8, 1986. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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