AD 91-18-15
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Fokker | F-28 0100 | Airworthiness Directives; FOKKER Model F-28 Mark 0100 Series Airplanes |
Unsafe Condition
Cracks and resultant reduced structural integrity of the vertical stabilizer due to insufficient reinforcement of rib 5.0 flanges.
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Required Actions
Reinforce the flanges of rib 5.0 by installing finger clips per Fokker Service Bulletin F100-55-014. Alternative methods of compliance or adjustments to compliance time may be approved by the FAA's Standardization Branch. Special flight permits under FAR 21.197/21.199 may be issued to operate to a base for AD compliance.
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Compliance Time
Prior to the accumulation of 6,000 landings since new or within 100 days after the effective date of this AD (October 8, 1991), whichever occurs later.
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Affected Aircraft
FOKKER Model F-28 Mark 0100 series airplanes, Serial Numbers 11244 through 11335.
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Federal Register Abstract
Vertical Stabilizer
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_91-18-15.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 91-18-15 Document Type: AD Final Rules Docket Number: 91-NM-54-AD Subject Heading: Airworthiness Directives; FOKKER Model F-28 Mark 0100 Series Airplanes Subject: Vertical Stabilizer Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/08/1991 Make: Model: F.28 Mark 0100 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 91-18-15 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 91-NM-54-AD AMENDMENT: 39-8018 AD NUMBER: 91-18-15 SUBJECT HEADING: Airworthiness Directives; FOKKER Model F-28 Mark 0100 Series Airplanes ACTION: SUMMARY: DATES: Effective October 8, 1991. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 91-18-15 FOKKER: Amendment 39-8018. Docket No. 91-NM-54-AD. Applicability: Model F-28 Mark 0100 series airplanes, Serial Numbers 11244 through 11335, certificated in any category. Compliance: Required prior to the accumulation of 6,000 landings since new or within 100 days after the effective date of this AD, whichever occurs later, unless previously accomplished. To prevent cracks and the resultant reduced structural integrity of the vertical stabilizer, accomplish the following: A. Reinforce the flanges of rib 5.0 by installing finger clips, in accordance with Fokker Service Bulletin F100-55-014, dated November 29, 1990. B. An alternative method of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM- 113, FAA, Transport Airplane Directorate. NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Standardization Branch, ANM-113. C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD, accomplish the following: D. The installation requirements shall be done in accordance with Fokker Service Bulletin F100-55-014, dated November 29, 1990. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Fokker Aircraft USA, Inc., 1199 North Fairfax Street, Alexandria, Virginia 22314. This amendment (39-8018, AD 91-18-15) becomes effective on October 8, 1991. FOOTER:
Document Text
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AD Final Rules - DRS_91-18-15.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 91-18-15 Document Type: AD Final Rules Docket Number: 91-NM-54-AD Subject Heading: Airworthiness Directives; FOKKER Model F-28 Mark 0100 Series Airplanes Subject: Vertical Stabilizer Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/08/1991 Make: Model: F.28 Mark 0100 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: 91-18-15 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 91-NM-54-AD AMENDMENT: 39-8018 AD NUMBER: 91-18-15 SUBJECT HEADING: Airworthiness Directives; FOKKER Model F-28 Mark 0100 Series Airplanes ACTION: SUMMARY: DATES: Effective October 8, 1991. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 91-18-15 FOKKER: Amendment 39-8018. Docket No. 91-NM-54-AD. Applicability: Model F-28 Mark 0100 series airplanes, Serial Numbers 11244 through 11335, certificated in any category. Compliance: Required prior to the accumulation of 6,000 landings since new or within 100 days after the effective date of this AD, whichever occurs later, unless previously accomplished. To prevent cracks and the resultant reduced structural integrity of the vertical stabilizer, accomplish the following: A. Reinforce the flanges of rib 5.0 by installing finger clips, in accordance with Fokker Service Bulletin F100-55-014, dated November 29, 1990. B. An alternative method of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM- 113, FAA, Transport Airplane Directorate. NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Standardization Branch, ANM-113. C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD, accomplish the following: D. The installation requirements shall be done in accordance with Fokker Service Bulletin F100-55-014, dated November 29, 1990. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Fokker Aircraft USA, Inc., 1199 North Fairfax Street, Alexandria, Virginia 22314. This amendment (39-8018, AD 91-18-15) becomes effective on October 8, 1991. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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