AD 88-21-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Vulcanair S.p.A. | P 68 | Airworthiness Directives; Partenavia Model P 68 Series Airplanes |
| aircraft | Vulcanair S.p.A. | P 68 Observer | Airworthiness Directives; Partenavia Model P 68 Series Airplanes |
| aircraft | Vulcanair S.p.A. | P 68B | Airworthiness Directives; Partenavia Model P 68 Series Airplanes |
| aircraft | Vulcanair S.p.A. | P 68C | Airworthiness Directives; Partenavia Model P 68 Series Airplanes |
| aircraft | Vulcanair S.p.A. | P 68C-TC | Airworthiness Directives; Partenavia Model P 68 Series Airplanes |
| aircraft | Vulcanair S.p.A. | P68TC Observer | Airworthiness Directives; Partenavia Model P 68 Series Airplanes |
Unsafe Condition
Pitch instability due to potential damage to left and right stabilator trim tabs and stabilator rear spar.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove, visually inspect, and replace or modify the left and right stabilator trim tabs and stabilator rear spar as per Partenavia Service Bulletin No. 73, Revision 1. If trim tab damage is found, inspect and repair stabilator, control system, attachments, stops, rigging, and controls before further flight.
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 after the effective date of this AD, unless already accomplished
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Affected Aircraft
Vulcanair S.p.A. Model P 68 Series (Serial Numbers 1 through 381)
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Federal Register Abstract
Stabilator Trim Tabs
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_88-21-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 88-21-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Partenavia Model P 68 Series Airplanes Subject: Stabilator Trim Tabs Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/27/1988 Make: Vulcanair S.p.A. Model: P 68 | P 68 Observer | P 68B | P 68C | P 68C-TC | P68TC Observer Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 88-21-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-6026 AD NUMBER: 88-21-04 SUBJECT HEADING: Airworthiness Directives; Partenavia Model P 68 Series Airplanes ACTION: SUMMARY: DATES: Effective October 27, 1988. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 88-21-04 PARTENAVIA COSTRUZIONE AERONAUTICHE, S.P.A.: Amendment 39-6026. Applies to P 68 Series (Serial Numbers 1 through 381) airplanes certificated in any category. Compliance: Required within the next 100 hours time-in-service after the effective date of this AD, unless already accomplished. To preclude pitch instability, accomplish the following: (a) Remove, visually inspect, and replace or modify as required, the left and right stabilator trim tabs, and, as required modify the stabilator rear spar as described in Paragraph 2 of Partenavia Service Bulletin No. 73, Revision 1, dated July 11, 1988. (b) If the inspection specified in Paragraph (a) of this AD shows damage to either trim tab, prior to further flight inspect for damage and repair, as required, the stabilator, control system, attachments, stops, rigging, and controls. (c) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished. (d) An equivalent means of compliance with this AD may be used if approved by the Manager, Brussels Aircraft Certification Office (AEU-100), c/o American Embassy, B-1000, Brussels, Belgium; telephone 32 2 513.38.30, extension 2710. All persons affected by this directive may obtain copies of the document(s) referred to herein upon request to Partenavia Costruzione Aeronautiche, S.p.A., 80026 Casoria (NA) Via G. Pascoli No. 7, Italy; telephone (081) 7596311; or may examine these documents at the FAA, Office of the Assistant Chief Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106. This amendment, 39-6026, becomes effective on October 27, 1988. FOOTER:
Document Text
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AD Final Rules - DRS_88-21-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 88-21-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Partenavia Model P 68 Series Airplanes Subject: Stabilator Trim Tabs Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/27/1988 Make: Vulcanair S.p.A. Model: P 68 | P 68 Observer | P 68B | P 68C | P 68C-TC | P68TC Observer 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: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 88-21-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-6026 AD NUMBER: 88-21-04 SUBJECT HEADING: Airworthiness Directives; Partenavia Model P 68 Series Airplanes ACTION: SUMMARY: DATES: Effective October 27, 1988. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 88-21-04 PARTENAVIA COSTRUZIONE AERONAUTICHE, S.P.A.: Amendment 39-6026. Applies to P 68 Series (Serial Numbers 1 through 381) airplanes certificated in any category. Compliance: Required within the next 100 hours time-in-service after the effective date of this AD, unless already accomplished. To preclude pitch instability, accomplish the following: (a) Remove, visually inspect, and replace or modify as required, the left and right stabilator trim tabs, and, as required modify the stabilator rear spar as described in Paragraph 2 of Partenavia Service Bulletin No. 73, Revision 1, dated July 11, 1988. (b) If the inspection specified in Paragraph (a) of this AD shows damage to either trim tab, prior to further flight inspect for damage and repair, as required, the stabilator, control system, attachments, stops, rigging, and controls. (c) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished. (d) An equivalent means of compliance with this AD may be used if approved by the Manager, Brussels Aircraft Certification Office (AEU-100), c/o American Embassy, B-1000, Brussels, Belgium; telephone 32 2 513.38.30, extension 2710. All persons affected by this directive may obtain copies of the document(s) referred to herein upon request to Partenavia Costruzione Aeronautiche, S.p.A., 80026 Casoria (NA) Via G. Pascoli No. 7, Italy; telephone (081) 7596311; or may examine these documents at the FAA, Office of the Assistant Chief Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106. This amendment, 39-6026, becomes effective on October 27, 1988. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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