AD 70-22-06

AD Final Rules - DRS_70-22-06.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
70-22-06
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
BOEING Model 747 Series Airplanes
Subject:
Engine Cowl Fluid Drain
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
11/03/1970
Make:
The Boeing Company
Model:
747-100 Series | 747-100B Series | 747-100B SUD Series | 747-200B Series | 747-200C Series | 747-200...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Superseded AD: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Superseded By: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: 70-22-06
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-1100

AD NUMBER:   70-22-06

SUBJECT HEADING:   BOEING Model 747 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective November 3, 1970.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
70-22-06 BOEING: Amdt 39-1100. Applies to Model 747 Series Airplanes.

Compliance required as indicated.

To prevent fuel leakage and possible engine fire due to a damaged or misaligned engine cowl fluid drain bellows seal, accomplish the following:

(a) Within the next 100 hours' time in service after the effective date of this AD, unless the seal modification in accordance with (b) or (c), below, have been previously accomplished, inspect the bellows seal on the gang drain assembly each time the engine cowl doors are closed to insure proper seal installation and seating on the drain duct in accordance with the inspection instructions in Boeing Service Bulletin 71-2018, Revision 2, dated June 18, 1970, or later FAA approved revision or an equivalent method approved by the Chief, Aircraft Engineering Division, FAA Western Region.

(b) Within the next 300 hours' time in service after the effective date of this AD, unless previously accomplished, inspect the aft fuel drain duct for proper alignment with the turbine case and combustion chamber drains and modify the engine fluid drain bellows seal in accordance with Boeing Service Bulletin 71-2018, Revision 2, dated June 18, 1970, or later FAA approved revision or an equivalent method approved by the Chief, Aircraft Engineering Division, FAA Western Region.

(c) Within the next 1500 hours' time in service after the effective date of this AD, unless already accomplished, modify the engine gang drain bellows seal in accordance with Boeing Service Bulletin 71-2030, dated October 16, 1970, or later FAA approved revision or an equivalent method approved by the Chief, Aircraft Engineering Division, FAA Western Region.

(d) Upon completion of the work described in (c), the inspection and modification requirements of (a) and (b) are no longer applicable.

This amendment becomes effective on November 3, 1970.

FOOTER: