AD 64-22-01

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AD Number:
64-22-01
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
BOEING Models 707 and 720 Series Aircraft
Subject:
Fuel Tank Vent Float Valve Arms
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
10/22/1964
Make:
The Boeing Company
Model:
707-100 Long Body | 707-100B Long Body | 707-100B Short Body | 707-200 | 707-300 Series | 707-300B S...Show more
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Superseded AD: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Superseded By: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: 64-22-01
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:  

AD NUMBER:   64-22-01

SUBJECT HEADING:   BOEING Models 707 and 720 Series Aircraft

ACTION:  

SUMMARY:  

DATES:   Effective October 22, 1964.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
64-22-01 BOEING: Amdt. 815 Part 507 Federal Register September 19, 1964. Applies to Models 707 and 720 Series Aircraft.

Compliance required as indicated.

There have been failures of the fuel tank vent float valve arms causing the float to break loose from the main valve assembly. This permits the vent valve (which is normally float actuated to the closed position by a high fuel level) to remain open and allow (under some flight conditions) fuel to fill the surge tank and spill out the wing tip vent scoop. To correct this condition, accomplish the following:

(a) Within 500 hours' time in service after the effective date of this directive, unless already accomplished in the previous 500 hours' time in service and within every 1,000 hours time in service thereafter until compliance with (b) has been accomplished, visually inspect the reserve fuel tank vent valve assemblies in each wing for cracks or deformation. If the valve assembly is in a failed condition, or if cracks or deformed parts are found, replace the parts before further flight.

(b) Within 6,000 hours' time in service after the effective date of this directive modify all fuel tank vent valve assemblies in each tank by installing a float stop bracket assembly, Boeing P/N 69-31399-1, in accordance with Boeing Service Bulletin No. 1958 or an equivalent method processed through the Aircraft Engineering Division, FAA Western Region, Los Angeles, California. When this modification has been accomplished the repetitive inspection of (a) may be discontinued.

(c) Upon request of the operator, an FAA maintenance inspector, subject to prior approval of the Chief, Aircraft Engineering Division, FAA Western Region, may adjust the repetitive inspection intervals specified in this AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the increase for such operator.

(Boeing Service Bulletin No. 1958 covers this subject.)

This directive effective October 22, 1964.

FOOTER: