# AD 88-21-04: Stabilator Trim Tabs

- Type: Airworthiness directive
- Status: Current
- Products: Vulcanair P 68, P 68 Observer, P 68B, P 68C, P 68C-TC and P68TC Observer
- Effective: October 27, 1988
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-6026
- Registered aircraft: 44 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C982D164569E583086256A4D0045065D.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/88-21-04

## The airworthiness directive

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 equivalentmeans 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.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A31EU](https://openairdocs.org/tcds/A31EU): Vulcanair S.p.A.; names 6 of 10 models: P.68C-TC, P.68B, P.68 Observer, P.68TC Observer, P.68, P.68C

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 44 (44 by airframe model, 0 by engine model)
- Makers: Partenavia 37, Vulcanair 7

Models with the most aircraft:

- [Partenavia P.68C](https://openairdocs.org/model/partenavia-p-68c): 20 aircraft (airframe model)
- [Partenavia P 68 OBSERVER](https://openairdocs.org/model/partenavia-p-68-observer): 5 aircraft (airframe model)
- [Partenavia P68B](https://openairdocs.org/model/partenavia-p68b): 5 aircraft (airframe model)
- [Partenavia P 68 C/TC](https://openairdocs.org/model/partenavia-p-68-c-tc): 5 aircraft (airframe model)
- [Vulcanair P68C](https://openairdocs.org/model/vulcanair-p68c): 5 aircraft (airframe model)
- [Vulcanair P68 TC OBSERVER](https://openairdocs.org/model/vulcanair-p68-tc-observer): 2 aircraft (airframe model)
- [Partenavia P68](https://openairdocs.org/model/partenavia-p68): 1 aircraft (airframe model)
- [Partenavia P68-TC OBSERVER](https://openairdocs.org/model/partenavia-p68-tc-observer): 1 aircraft (airframe model)

All 8 models: https://openairdocs.org/ad/88-21-04/models.md
Every aircraft: https://openairdocs.org/ad/88-21-04/aircraft.md

Its text cites no advisory circulars or STCs.

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