# AD 80-09-04: Vertical Fin Fittings and Stabilator Attachments

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-34-200 and PA-34-200T
- Effective: April 24, 1980
- Published: April 17, 1980
- Issued: April 4, 1980
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3749
- Registered aircraft: 735 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B5C3F07F608BA44C8625699E0076936A.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/80-09-04

## The airworthiness directive

80-09-04 PIPER AIRCRAFT CORPORATION: Amendment 39-3749. Applies to Model PA-34-200, serial numbers 34-E4, 34-7250001 through 34-7450220, Model PA-34-200T, serial numbers 34-7570001 through 34-7770441, airplanes certificated in all categories.

Compliance is required as indicated, unless already accomplished.

To prevent elongation or cracking of fitting holes and wearing of attaching nuts and bolts of the vertical fin attachment fittings and stabilator attachment and stabilator hinge assembly, accomplish the following within 25 hours time in service after the effective date of this AD:

a. Inspect, replace parts and modify, as necessary, the vertical fin attachment fittings and stabilator attachment and stabilator hinge assembly in accordance with Piper Aircraft Corporation Service Bulletin No. 579, dated November 14, 1977, or in an equivalent manner approved by the Chief, Engineering and Manufacturing Branch, FAA, Southern Region.

b. Make appropriate maintenancerecord entry.

This amendment becomes effective April 24, 1980.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A7SO](https://openairdocs.org/tcds/A7SO): Piper Aircraft Inc.; names 2 of 5 models: PA-34-200 (Seneca), PA-34-200T (Seneca II)

## 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: 735 (735 by airframe model, 0 by engine model)
- Makers: Piper 735

Models with the most aircraft:

- [Piper PA-34-200T](https://openairdocs.org/model/piper-pa-34-200t): 563 aircraft (airframe model)
- [Piper PA-34-200](https://openairdocs.org/model/piper-pa-34-200): 172 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/80-09-04/models.md
Every aircraft: https://openairdocs.org/ad/80-09-04/aircraft.md

Its text cites no advisory circulars or STCs.

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