AD 51-12-01

AD Final Rules - DRS_51-12-01.html
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AD Number:
51-12-01
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
WRIGHT Models C9GB, C9GC, C9HD and Military R-1820 Series Engines
Subject:
Piston Pins
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
Make:
Wright Aeronautical Division, Curtiss-Wright Corporation | Curtiss-Wright/Marquette, Inc.
Model:
718C9GB1 | Military Cyclone R-1820 Series | Cyclone 702C9GC1 | Cyclone 702C9GC2 | Cyclone 702C9GC3 |...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Superseded AD: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Superseded By: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: 51-12-01
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:  

AD NUMBER:   51-12-01

SUBJECT HEADING:   WRIGHT Models C9GB, C9GC, C9HD and Military R-1820 Series Engines

ACTION:  

SUMMARY:  

DATES:  

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:   51-12-01 WRIGHT: Applies to All Models C9GB, C9GC, C9HD and Military R-1820 Series Engines.

Compliance required as soon as possible, but not later than April 1, 1952.

To preclude piston pin failures, piston pins P/N's 68827, 117691, and 131061, which have not been carburized, must be replaced at each engine overhaul. Piston pins P/N's 117691 and 131061 retain the same part number when carburized, but may be identified by the symbol "C" on the recessed end of the pin. Piston pins P/N 68827 were never carburized and therefore should not be reused. It is suggested that orders for carburized piston pins be placed well in advance of required delivery date.

(Wright Service Bulletin No. C9-156A covers this same subject.)

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