# AD 86-20-12: Engine Mount Beams

- Type: Airworthiness directive
- Status: Current
- Products: Cessna 404
- Effective: October 21, 1986
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-5442
- Registered aircraft: 26 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/21AD9871A9ACA801862569BA004BC47E.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/86-20-12

## The airworthiness directive

86-20-12 CESSNA: Amendment 39-5442. Applies to the Model 404 (Serial Numbers 404- 0001 through 404-0136, 404-0201 through 404-0246, 404-0401 through 404-0460, 404-0601 through 404-0695, and 404-0801 through 404-0859) airplanes certificated in any category:

Compliance: Required as indicated, unless already accomplished.

To ensure the structural integrity of the engine mount beams, accomplish the following:

  (a) Inspect the engine beams for cracks in accordance with the provisions of Cessna Multi-Engine Service Bulletin MEB 86-7, dated April 18, 1986, per the following schedule:

  (1) On all airplanes with 1600 or more hours time-in-service (TIS), fluorescent penetrant inspect the engine beams within the next 100 flight hours and at each 800 hours TIS thereafter.

  (2) On all airplanes with less than 1600 hours TIS, fluorescent penetrant inspect the engine beams between 1600 and 1700 hours TIS and at each 800 hours TIS thereafter.

  (3) The fluorescent penetrant inspections required by paragraphs (a)(1) and (a)(2) of this AD are no longer required on engine beams that have Service Kit SK 404-40 installed.

  (b) If cracks are found in the inspection of Paragraph (a), prior to further flight perform the following in accordance with Cessna Service Bulletin MEB 86-7:

  (1) If cracks found in the top (horizontal portion) of the beam are less than 2.00 inches in length, stop drill and install SK 404-40 in accordance with MEB 86-7.

  (2) If cracks found in the top (horizontal portion) of the beam are greater than 2.00 inches in length, contact Cessna Aircraft Company for FAA approved repair disposition at the following address: Cessna Aircraft Company, Customer Service, P.O. Box 1521, Wichita, Kansas 67201; Telephone (316) 946-7550.

  (c) Aircraft may be flown in accordance with Federal Aviation Regulation 21.197 to a location where the provisions of this AD can be accomplished.

  (d) Any equivalent method of compliance with this AD must be approved by the Manager, Wichita Aircraft Certification Office, FAA, 1801 Airport Road, Room 100, Mid- Continent Airport, Wichita, Kansas 67209.

All persons affected by this directive may obtain copies of the documents referred to herein upon request to Cessna Aircraft Company, P.O. Box 1521, Wichita, Kansas 67201; or FAA, Office of the Regional Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106.

This amendment becomes effective October 21, 1986.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A25CE](https://openairdocs.org/tcds/A25CE): Textron Aviation Inc.; names 1 of 2 models: 404

## 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: 26 (26 by airframe model, 0 by engine model)
- Makers: Cessna 26

Models with the most aircraft:

- [Cessna 404](https://openairdocs.org/model/cessna-404): 26 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/86-20-12/models.md
Every aircraft: https://openairdocs.org/ad/86-20-12/aircraft.md

Its text cites no advisory circulars or STCs.

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