AD 85-01-07

AD Final Rules - DRS_85-01-07.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
85-01-07
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
BOEING Model 737 Series Airplane
Subject:
BBL 70.85 Rib Upper Chord Inspection
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
02/25/1985
Make:
The Boeing Company
Model:
737-100 Series | 737-200 Series | 737-200C Series | 737-300 Series | 737-400 Series | 737-500 Series...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Superseded AD: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Superseded By: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: 85-01-07
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-4983

AD NUMBER:   85-01-07

SUBJECT HEADING:   BOEING Model 737 Series Airplane

ACTION:  

SUMMARY:  

DATES:   Effective February 25, 1985.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
85-01-07 BOEING: Amendment 39-4983. Applies to Model 737 series airplanes certificated in all categories listed in Boeing Service Bulletin 737-57-1087, Revision 4, dated November 18, 1983. Unless previously accomplished, prior to the accumulation of 10,000 landings or within 180 days or 2500 flight cycles after the effective date of this AD, whichever occurs later, accomplish the following to detect cracking which may lead to failure of the body buttock line (BBL) 70.85 rib upper chord:

A. Visually inspect the BBL 70.85 rib upper chord for cracks in accordance with Table I of the Flight Safety Addendum of Boeing Service Bulletin 737-57-1087, Revision 4, or later FAA approved revisions. Repeat the inspections at intervals not to exceed 5000 landings.

B. Visually inspect the BBL 70.85 rib upper chord repair angles installed in accordance with Boeing Service Bulletin 737-57-1087, Revision 2, or earlier FAA approved revisions, for cracks in accordance with Table I of the Flight Safety Addendum of Boeing Service Bulletin 737- 57-1087, Revision 4 or later FAA approved revisions. Repeat the inspection at intervals not to exceed 5000 landings.

C. If cracks are detected, prior to further flight replace or repair cracked parts in accordance with Table I of the "Accomplishment Instructions" in Boeing Service Bulletin 737- 57-1087, Revision 4, or later FAA approved revisions; and continue the repetitive inspections of paragraph A., above, at intervals not to exceed 5000 landings.

D. Parts repaired in accordance with the "stop drilling" interim action (a) in Table I of the "Accomplishment Instructions" of Boeing Service Bulletin 737-57-1087, Revision 4, must be reinspected at intervals not to exceed 1500 landings and must be repaired in accordance with Part III or IV of Boeing Service Bulletin 737-57-1087, Revision 4, or later FAA approved revisions, within two years of the accomplishment of the interim repair.

E. The requirements of this AD are terminated if the Preventative Modification Part III or the Special Modification Part IV of the Accomplishment Instructions in Boeing Service Bulletin 737-57-1087, Revision 3, or later FAA approved revisions, is incorporated.

F. Airplanes may be ferried to a maintenance base for repairs or replacement of parts in accordance with FAR 21.197 and 21.199 with prior approval of the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.

G. For the purpose of this AD, and when approved by an FAA Maintenance Inspector, the number of landings may be computed by dividing each airplane's time in service by the operator's fleet average time from takeoff to landing for the aircraft type.

H. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region, Seattle, Washington.

I. Upon request of the operator, an FAA Maintenance Inspector, subject to prior approval of the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region, may adjust the repetitive inspection intervals specified in this AD to permit compliance at an established inspection period of an operator, if the request contains substantiating data to justify the adjustment period.

All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to the Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124. These documents may also be examined at FAA, Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington.

This amendment becomes effective February 25, 1985.

FOOTER: