AD 54-26-01

AD Final Rules - DRS_54-26-01.html
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AD Number:
54-26-01
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Grumman Models G-44 and G-44A Aircraft
Subject:
Landing Gear Valve Placard
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
Make:
Gulfstream American Corporation
Model:
G-44 | G-44A
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Superseded AD: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Superseded By: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: 54-26-01
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:  

AD NUMBER:   54-26-01

SUBJECT HEADING:   Airworthiness Directives; Grumman Models G-44 and G-44A Aircraft

ACTION:  

SUMMARY:  

DATES:  

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
54-26-01 GRUMMAN: Applies to All Models G-44 and G-44A Aircraft.

Compliance required by June 15, 1955.

There have been reported numerous instances of the landing gear locking mechanism failing because of either hydraulic system leaks or failure of the mechanical locks. These malfunctions have been reported in both the up and down position of the landing gear. To prevent future similar malfunctions, provide a more positive means of holding the gear in its locked position, both in the fully extended and fully retracted positions. Grumman Service Bulletin No. 24, October 18, 1954, accomplishes this by providing a closed center hydraulic system. This arrangement provides hydraulic pressure to hold the gear in the selected position and unwanted extension or retraction is prevented even though the mechanical locks may fail or leaks develop in the hydraulic system.

This supersedes AD 48-05-05.

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