AD 61-03-04

AD Final Rules - DRS_61-03-04.html
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AD Number:
61-03-04
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
LOCKHEED Model 1649A Aircraft
Subject:
Fuel Vent System
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
02/13/1961
Make:
Lockheed Martin Aeronautics Company
Model:
1649A-98
Product Type:
Aircraft
Product Subtype:
Large 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Superseded AD: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Superseded By: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: 61-03-04
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:  

AD NUMBER:   61-03-04

SUBJECT HEADING:   LOCKHEED Model 1649A Aircraft

ACTION:  

SUMMARY:  

DATES:   Effective February 13, 1961.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
61-03-04 LOCKHEED: Amdt. 244 Part 507 Federal Register January 27, 1961. Applies to All Model 1649A Aircraft.

Compliance required as indicated.

One of the following modifications to the vent system must be accomplished within 400 hours of time in service after the effective date of this directive.

(a) Modify only the right-hand vent float valve of the No. 7 tank (LAC P/N 634024- 3, Aero Supply Mfg. Co. P/N 22-1845-002) to a combination pressure relief and suction relief valve by removing the float assembly so that only the pressure and suction relief features remain operational. Replace the valve spring (P/N 22-0228-1) with spring (P/N 22-0337-1) having a higher cracking pressure.

(b) Replace only the original right-hand side valve assembly on No. 7 fuel tank with a new valve assembly LAC P/N 634024-5 (Aero Supply Mfg. Co. P/N 22-1845-003).

(Lockheed Letter dated August 22, 1960, directed to all 1649 operators completely covers the details of this modification.)

This directive effective February 13, 1961.

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