# AD 74-26-02: Rudder Control

- Type: Airworthiness directive
- Status: Current
- Products: Revo Colonial C-1, Colonial C-2, Lake LA-4, Lake LA-4-200, Lake LA-4A and Lake LA-4P
- Effective: December 27, 1974
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-2041
- Registered aircraft: 154 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CBECB46FC9B9163A86256A540046B128.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/74-26-02

## The airworthiness directive

74-26-02 CONSOLIDATED AERONAUTICS: Amendment 39-2041. Applies to Colonial Model C-1, C-2 and Lake Model LA-4, LA-4A, LA-4P and LA-4-200 airplanes through serial number 599 certificated in all categories.

Compliance required as indicated.

To prevent loss of rudder control as a result of the failure of the arms of the rudder bellcrank assembly, P/N's 2-7109-1, 2-7103-91 and 1-7103-1, accomplish the following:

  (a) Within 10 hours' time in service after the effective date of this AD and thereafter at intervals not to exceed 100 hours' time in service from the date of the last inspection except as provided in Paragraph (b) or until replaced in accordance with Paragraph (c):

Visually inspect the rudder bellcrank assembly, P/N's 2-7109-1, 2-7103-91 and 1-7103-1, in accordance with Lake Aircraft, Division of Consolidated Aeronautics, Inc. Service Letter L- 50, or later FAA approved revision.

  (b) When rudder bellcrank assembly, P/N 2-7109-1 has arm P/N's 2-7109-23 and 2- 7109-24 installed or has arms of .080 inches or greater thickness installed, the inspection specified in paragraph (a) may be discontinued.

  (c) Replace rudder bellcrank assemblies having cracked or deformed arms before further flight with a new rudder bellcrank assembly P/N 2-7109-1 having arms of .080 inches or greater thickness, or an equivalent part approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, New England Region.

  (d) The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Lake 4 Sales Corporation, P.O. Box 399, Tomball, Texas 77375. These documents may also be examined at the Office of Regional Counsel, New England Region, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803 and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C.

This amendment becomes effective December 27, 1974.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1A13](https://openairdocs.org/tcds/1A13): Revo Incorporated; names 6 of 7 models: Lake LA-4A, Lake LA-4, Lake LA-4-200, Lake LA-4P, Colonial C-1, Colonial C-2

## 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: 154 (154 by airframe model, 0 by engine model)
- Makers: Consolidated Aeronautics 154

Models with the most aircraft:

- [Consolidated Aeronautics LAKE LA-4-200](https://openairdocs.org/model/consolidated-aeronautics-lake-la-4-200): 139 aircraft (airframe model)
- [Consolidated Aeronautics LAKE LA-4](https://openairdocs.org/model/consolidated-aeronautics-lake-la-4): 15 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/74-26-02/models.md
Every aircraft: https://openairdocs.org/ad/74-26-02/aircraft.md

Its text cites no advisory circulars or STCs.

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