AD 59-10-07

final rule

LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines

AD Number
59-10-07
Status
final_rule
Effective Date
Product Category
engine
Docket
Unknown
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
engine Lycoming Engines GO-480-A1A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-B LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-B1A6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-B1B LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-B1C LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-B1D LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-C1B6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-C1D6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-C2C6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-C2D6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-C2E6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-C3A6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-D1A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-E1A6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-F1A6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-F2A6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-F3A6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-F3B6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-F4A6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-F4B6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-F6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-G1A6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-G1B6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-G1D6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GO-480-G2D6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GSO-480-A1A6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GSO-480-A1C6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GSO-480-B1A6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GSO-480-B1B6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GSO-480-B1C6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines GSO-480-B2D6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines IGSO-480-A1A6 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-320-A1A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-320-A1B LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-320-A2A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-320-A2B LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-320-A3A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-320-A3B LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-320-B1A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-320-B1B LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-320-B2A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-320-B2B LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-320-B3A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-320-B3B LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-340-A1A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-340-A2A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-340-B1A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-360-A1A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-360-A2A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-360-B1A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-360-B2A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-360-C1A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-360-C2A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-360-C2B LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-540-A1A LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-540-A1A5 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-540-A1B5 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-540-A1C5 LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-540-A2B LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-540-J1A5D LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
engine Lycoming Engines O-540-J2A5D LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines

Unsafe Condition

Cylinder baffle clamps can become wedged between the cylinders causing barrel distortion and possible extensive damage to the cylinder bore and piston assembly due to normal expansion during engine operation.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Remove and replace cylinder baffle clamps with baffle retainers and retainer hooks, or remove and rework clamps to provide more clearance between the lower portion of the clamp and the cylinder.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

as soon as possible but not later than July 1, 1959

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines as noted.

AI-generated summary from the source AD text. Verify against the official source before acting.

Federal Register Abstract

Cylinder Baffle Clamps

Applicability Source Text

Show captured applicability text from the source AD 
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AD Number:
59-10-07
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
Subject:
Cylinder Baffle Clamps
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
Make:
Lycoming Engines
Model:
GO-480-A1A | GO-480-B | GO-480-B1A6 | GO-480-B1B | GO-480-B1C | GO-480-B1D | GO-480-C1B6 | GO-480-C1...Show more
Product Type:
Engine
Product Subtype:
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
Updated RGL applicability to match AD applicability; CAR C-11-185
AIRWORTHINESS DIRECTIVES FINAL RULES: 59-10-07
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:  

AD NUMBER:   59-10-07

SUBJECT HEADING:   LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines

ACTION:  

SUMMARY:  

DATES:  

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
59-10-07 LYCOMING: Applies to O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines As Noted.

Compliance required as soon as possible but not later than July 1, 1959.

It has been found that due to normal expansion of the cylinders during engine operation, the cylinder baffle clamps can become wedged between the cylinders causing barrel distortion and possible extensive damage to the cylinder bore and piston assembly. To correct this condition, the cylinder baffle clamps must either be

(1) removed and replaced with baffle retainers and retainer hooks, or

(2) removed and reworked to provide more clearance between the lower portion of the clamp and the cylinder.

Lycoming Service Bulletin No. 254A lists the parts required to comply with alternate method (1) above. An acceptable method of accomplishing the rework noted as alternate method (2) is also outlined in that bulletin, as well as the serial numbers of engines which comply with the requirements of this directive as delivered from the factory.

FOOTER:

Document Text

Show stored source text (verify against official source) 
AD Final Rules - DRS_59-10-07.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
59-10-07
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines
Subject:
Cylinder Baffle Clamps
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
Make:
Lycoming Engines
Model:
GO-480-A1A | GO-480-B | GO-480-B1A6 | GO-480-B1B | GO-480-B1C | GO-480-B1D | GO-480-C1B6 | GO-480-C1...Show more
Product Type:
Engine
Product Subtype:
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
Updated RGL applicability to match AD applicability; CAR C-11-185
AIRWORTHINESS DIRECTIVES FINAL RULES: 59-10-07
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:  

AD NUMBER:   59-10-07

SUBJECT HEADING:   LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines

ACTION:  

SUMMARY:  

DATES:  

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
59-10-07 LYCOMING: Applies to O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines As Noted.

Compliance required as soon as possible but not later than July 1, 1959.

It has been found that due to normal expansion of the cylinders during engine operation, the cylinder baffle clamps can become wedged between the cylinders causing barrel distortion and possible extensive damage to the cylinder bore and piston assembly. To correct this condition, the cylinder baffle clamps must either be

(1) removed and replaced with baffle retainers and retainer hooks, or

(2) removed and reworked to provide more clearance between the lower portion of the clamp and the cylinder.

Lycoming Service Bulletin No. 254A lists the parts required to comply with alternate method (1) above. An acceptable method of accomplishing the rework noted as alternate method (2) is also outlined in that bulletin, as well as the serial numbers of engines which comply with the requirements of this directive as delivered from the factory.

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.

View Official Source ↗ Find More ADs for Lycoming Engines GO-480-A1A

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