# AD 79-21-09 R1: Electrical System

- 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: June 8, 1981
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-4128
- Registered aircraft: 154 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2726B1A1CE00685886256A540046DD3E.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/79-21-09-R1

## The airworthiness directive

79-21-09 R1 CONSOLIDATED AERONAUTICS: Amendment 39-3589 is further amended by Amendment 39-4128. Applies to Colonial C-1, Colonial C-2, Lake LA-4, Lake LA-4A, Lake LA-4P, and Lake LA-4-200 airplanes with an anchor light or bilge pump installed with a power line which bypasses the battery relay.

Compliance required within the next 50 hours time in service unless already accomplished.

To preclude burning of power wires in case of an electrical short, install a Cole-Hersee 3031-D fuse holder and a Buss AG5A 5 ampere fuse, or FAA approved equivalents, within 4 inches of the battery relay, in the power lines for the anchor light and bilge pump.

(Lake Aircraft Division, Consolidated Aeronautics Service Bulletin B-62 pertains to the installation required by this AD.)

Upon request, an equivalent method of compliance with the requirements of this AD may be approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, New England Region.

Amendment 39-3589 became effective upon publication in the FEDERAL REGISTER.

This Amendment, 39-4128, becomes effective June 8, 1981.

## 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/79-21-09-R1/models.md
Every aircraft: https://openairdocs.org/ad/79-21-09-R1/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.