AD 76-24-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Revo, Incorporated | Lake LA-4-200 | Airworthiness Directives; Consolidated Aeronautics Model Lake LA-4-200 Airplanes |
Unsafe Condition
Engine oil cooler failures allowing rapid loss of engine oil which could result in engine stoppage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the engine oil cooler (fluid fitting side) to determine if it is Model 8406J S/N 101 through 1500. If it is, replace with an FAA approved oil cooler not of the same model and serial number. If not, record the inspection in aircraft maintenance records.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before next flight of the affected airplanes for inspection; prior to further flight for replacement if applicable.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Lake Model LA-4-200 airplanes certified in all categories equipped with Stewart Warner Model 8406J engine oil coolers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Engine Oil Coolers
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_76-24-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 76-24-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Consolidated Aeronautics Model Lake LA-4-200 Airplanes Subject: Engine Oil Coolers Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/15/1976 Make: Revo, Incorporated Model: Lake LA-4-200 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 76-24-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2774 AD NUMBER: 76-24-02 SUBJECT HEADING: Airworthiness Directives; Consolidated Aeronautics Model Lake LA-4-200 Airplanes ACTION: SUMMARY: DATES: Effective immediately upon publication in the Federal Register for all persons except those to whom it was made effective immediately upon receipt of airmail letter dated October 15, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 76-24-02 LAKE AIRCRAFT, DIVISION OF CONSOLIDATED AERONAUTICS, INC: Amendment 39-2774. Applies to all Lake Model LA-4-200 airplanes certified in all categories equipped with Stewart Warner Model 8406J engine oil coolers. Compliance required as indicated unless already accomplished. To preclude possible oil cooler failures allowing rapid loss of engine oil which could result in engine stoppage, accomplish the following: A. Before next flight of the affected airplanes, inspect the engine oil cooler (fluid fitting side) to determine whether it is a Model 8406J S/N 101 through 1500. 1. If the oil cooler is a Model 8406J S/N 101 through 1500, prior to further flight, replace this cooler with an FAA approved oil cooler not of the above model and serial number. 2. If the oil cooler is not of the model and serial number listed above, make an entry in the aircraft maintenance records indicating that this airworthiness directive has been accomplished and the airplane may be returned to service. B. The inspection and maintenance record entry required by paragraph A2 may be accomplished by holder of a pilot's certificate issued under Part 61 of the Federal Aviation Regulations on any aircraft owned or operated by him. C. Equivalent methods of compliance with this AD may be approved by the Chief, Engineering and Manufacturing Branch, FAA, New England Region. NOTE: A ferry permit to accomplish a needed oil cooler replacement may be issued under the provisions of FAR 21.197 by FAA District Offices, with appropriate limitations. This amendment becomes effective immediately upon publication in the Federal Register for all persons except those to whom it was made effective immediately upon receipt of airmail letter dated October 15, 1976. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_76-24-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 76-24-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Consolidated Aeronautics Model Lake LA-4-200 Airplanes Subject: Engine Oil Coolers Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/15/1976 Make: Revo, Incorporated Model: Lake LA-4-200 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 76-24-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2774 AD NUMBER: 76-24-02 SUBJECT HEADING: Airworthiness Directives; Consolidated Aeronautics Model Lake LA-4-200 Airplanes ACTION: SUMMARY: DATES: Effective immediately upon publication in the Federal Register for all persons except those to whom it was made effective immediately upon receipt of airmail letter dated October 15, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 76-24-02 LAKE AIRCRAFT, DIVISION OF CONSOLIDATED AERONAUTICS, INC: Amendment 39-2774. Applies to all Lake Model LA-4-200 airplanes certified in all categories equipped with Stewart Warner Model 8406J engine oil coolers. Compliance required as indicated unless already accomplished. To preclude possible oil cooler failures allowing rapid loss of engine oil which could result in engine stoppage, accomplish the following: A. Before next flight of the affected airplanes, inspect the engine oil cooler (fluid fitting side) to determine whether it is a Model 8406J S/N 101 through 1500. 1. If the oil cooler is a Model 8406J S/N 101 through 1500, prior to further flight, replace this cooler with an FAA approved oil cooler not of the above model and serial number. 2. If the oil cooler is not of the model and serial number listed above, make an entry in the aircraft maintenance records indicating that this airworthiness directive has been accomplished and the airplane may be returned to service. B. The inspection and maintenance record entry required by paragraph A2 may be accomplished by holder of a pilot's certificate issued under Part 61 of the Federal Aviation Regulations on any aircraft owned or operated by him. C. Equivalent methods of compliance with this AD may be approved by the Chief, Engineering and Manufacturing Branch, FAA, New England Region. NOTE: A ferry permit to accomplish a needed oil cooler replacement may be issued under the provisions of FAR 21.197 by FAA District Offices, with appropriate limitations. This amendment becomes effective immediately upon publication in the Federal Register for all persons except those to whom it was made effective immediately upon receipt of airmail letter dated October 15, 1976. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
Related Airworthiness Directives
2013-08-14 Recurring
final ruleAirworthiness Directives; Revo, Incorporated Airplanes
Unsafe Condition: Fretting, cracking, or corrosion of the horizontal stabilizer attachment fitting, which could lead to structural failure of the fitting.
2002-21-05
final ruleAirworthiness Directives; REVO, Incorporated Models Lake LA-4, Lake LA-4A, Lake LA-4P, Lake LA-4-200, and Lake Model 250 Airplanes
Unsafe Condition: Cracks in the upper and lower wing spar doublers and angles, which could lead to wing spar failure and wing separation from the airplane.
2000-10-22
final ruleAirworthiness Directives; REVO, Incorporated Models Lake LA-4, Lake LA-4A, Lake LA-4P, Lake LA-4-200, and Lake Model 250 Airplanes
Unsafe Condition: Fatigue cracks in the wing spars, specifically at the second-most inboard wing attachment bolt hole, could result in wing separation and loss of control.
79-21-09 R1
final ruleAirworthiness Directives; Consolidated Aeronautics Models Colonial C-1, Colonial C-2, Lake LA-4, Lake LA-4A, Lake LA-4P, and Lake LA-4-200 Airplanes
Unsafe Condition: Burning of power wires in case of an electrical short due to anchor light or bilge pump power lines bypassing the battery relay.
