AD 88-18-06
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Zlin Aircraft a.s. | Zlin 526L | Airworthiness Directives; Moravan Model ZLIN 526L Series Airplanes |
Unsafe Condition
Cracks in the forward portion of the cabin area tubular structure around the airplane leveling points could lead to structural airframe failure.
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Required Actions
Visually inspect using a 3-power magnifying glass and supplementary lighting for cracks in the cabin tubular structure as per MORAVAN Mandatory Service Bulletin Z526L. Repair cracks before further flight per MORAVAN instructions. Allow equivalent compliance if approved by FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 100 hours time-in-service (TIS) after the effective date of this AD and every 100 hours TIS thereafter
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Affected Aircraft
Moravan Model ZLIN 526L (all serial numbers) airplanes certificated in any category
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Federal Register Abstract
Cabin Tubular Structure
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_88-18-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 88-18-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Moravan Model ZLIN 526L Series Airplanes Subject: Cabin Tubular Structure Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/08/1988 Make: Zlin Aircraft a.s. Model: Zlin 526L Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 88-18-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5994 AD NUMBER: 88-18-06 SUBJECT HEADING: Airworthiness Directives; Moravan Model ZLIN 526L Series Airplanes ACTION: SUMMARY: DATES: Effective September 8, 1988. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 88-18-06 MORAVAN: Amendment 39-5994. Applies to Model ZLIN 526L (all serial numbers) airplanes certificated in any category. Compliance: Required within the next 100 hours time-in-service (TIS) after the effective date of this AD and every 100 hours TIS thereafter, unless already accomplished. To preclude structural airframe failure, accomplish the following: (a) Visually inspect, using a 3-power magnifying glass, the forward portion of the cabin area tubular structure around the airplane leveling points, for cracks using supplementary lighting as required in accordance with MORAVAN Mandatory Service Bulletin Z526L, dated July 30, 1987. If a crack is found, before further flight repair the crack in accordance with instructions from MORAVAN approved by the Manager, Aircraft Certification Staff, AEU-100. (b) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished. (c) An equivalent means of compliance with this AD may be used if approved by the Manager, Aircraft Certification Staff, AEU-100, Europe, Africa, and Middle East Office, FAA, c/o American Embassy, B- 1000 Brussels, Belgium. All persons affected by this directive may obtain copies of the document referred to herein upon request to Aircraft Certification Staff, AEU-100, Europe, Africa, and Middle East Office, FAA, c/o American Embassy, B-1000 Brussels, Belgium; or MORAVAN National Corp., 765-81 Otrokovice, Czechoslovakia; or may examine this document at the FAA, Office of the Regional Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106. This amendment, 39-5994, becomes effective on September 8, 1988. FOOTER:
Document Text
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AD Final Rules - DRS_88-18-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 88-18-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Moravan Model ZLIN 526L Series Airplanes Subject: Cabin Tubular Structure Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/08/1988 Make: Zlin Aircraft a.s. Model: Zlin 526L 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: 88-18-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5994 AD NUMBER: 88-18-06 SUBJECT HEADING: Airworthiness Directives; Moravan Model ZLIN 526L Series Airplanes ACTION: SUMMARY: DATES: Effective September 8, 1988. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 88-18-06 MORAVAN: Amendment 39-5994. Applies to Model ZLIN 526L (all serial numbers) airplanes certificated in any category. Compliance: Required within the next 100 hours time-in-service (TIS) after the effective date of this AD and every 100 hours TIS thereafter, unless already accomplished. To preclude structural airframe failure, accomplish the following: (a) Visually inspect, using a 3-power magnifying glass, the forward portion of the cabin area tubular structure around the airplane leveling points, for cracks using supplementary lighting as required in accordance with MORAVAN Mandatory Service Bulletin Z526L, dated July 30, 1987. If a crack is found, before further flight repair the crack in accordance with instructions from MORAVAN approved by the Manager, Aircraft Certification Staff, AEU-100. (b) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished. (c) An equivalent means of compliance with this AD may be used if approved by the Manager, Aircraft Certification Staff, AEU-100, Europe, Africa, and Middle East Office, FAA, c/o American Embassy, B- 1000 Brussels, Belgium. All persons affected by this directive may obtain copies of the document referred to herein upon request to Aircraft Certification Staff, AEU-100, Europe, Africa, and Middle East Office, FAA, c/o American Embassy, B-1000 Brussels, Belgium; or MORAVAN National Corp., 765-81 Otrokovice, Czechoslovakia; or may examine this document at the FAA, Office of the Regional Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106. This amendment, 39-5994, becomes effective on September 8, 1988. FOOTER:
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Retrieved: Apr 8, 2026
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