# AD 78-25-07: Vertical Fin Attachment Brackets

- Type: Airworthiness directive
- Status: Current
- Products: Cessna A150M and A152
- Effective: December 22, 1978
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3371
- Registered aircraft: 128 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9EB9D2FD4398ECF686256A340069182C.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/78-25-07

## The airworthiness directive

78-25-07 CESSNA: Amendment 39-3371. Applies to Models A150M (Serial Numbers A1500654 through A1500734) and A152 (Serial Numbers A1520735 through A1520833) airplanes.

COMPLIANCE: Required as indicated, unless already accomplished.

To assure necessary structural integrity of the vertical fin attachment to the airplane, in accordance with the instructions contained in Cessna Single Engine Service Letter SE78-62, dated October 13, 1978, or later revisions, within the next 25 hours time-in-service after the effective date of this AD, accomplish the following:

A) Replace the two existing Part Number 0431009-3 vertical fin attach brackets with two new Part Number 0431009-3 attach brackets obtained from Cessna.

B) Return the two brackets removed from each airplane to the Cessna factory for metallurgical examination.

C) Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.

This amendment becomes effective December 22, 1978.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 3A19](https://openairdocs.org/tcds/3A19): Textron Aviation Inc.; names 2 of 18 models: A150M, A152

## 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: 128 (128 by airframe model, 0 by engine model)
- Makers: Cessna 128

Models with the most aircraft:

- [Cessna A150M](https://openairdocs.org/model/cessna-a150m): 80 aircraft (airframe model)
- [Cessna A152](https://openairdocs.org/model/cessna-a152): 48 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/78-25-07/models.md
Every aircraft: https://openairdocs.org/ad/78-25-07/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.