AD 51-24-01

AD Final Rules - DRS_51-24-01.html
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AD Number:
51-24-01
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
LYCOMING Model GO-435-C2 Engines
Subject:
Exhaust Valve Seats
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
Make:
Lycoming Engines
Model:
GO-435-C2 (O-435-17)
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Superseded AD: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Superseded By: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: 51-24-01
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:  

AD NUMBER:   51-24-01

SUBJECT HEADING:   LYCOMING Model GO-435-C2 Engines

ACTION:  

SUMMARY:  

DATES:  

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:   51-24-01 LYCOMING: Applies to All Lycoming GO-435-C2 Engines Serially Numbered 1815-11 and Below Not Having the Letter "P" Stamped on the Upper Right-hand Corner of Each Cylinder Rocker Box and Installed in Navion Model B Aircraft.
To be accomplished by June 1, 1952 or next overhaul, whichever occurs first.
To prevent loosening of the exhaust valve seats in Lycoming GO-435-C2 engines installed in Navion Model B airplanes, the exhaust valve seats are to be peened in the cylinder head. The cylinders must be removed from the engine for this operation. When peening is accomplished, stamp "P" 1/8 inch high on upper right-hand corner of cylinder rocker box flange face near exhaust push rod.
(Lycoming Service Bulletin No. 145 also covers this subject.

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