AD 81-11-06 R1

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AD Number:
81-11-06 R1
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
BOEING 707/720 Series Airplanes
Subject:
Skin and/or Stringer Inspection
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
08/10/1981
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Superseded AD: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Superseded By: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: 81-11-06 R1
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-4178

AD NUMBER:   81-11-06 R1

SUBJECT HEADING:   BOEING 707/720 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective August 10, 1981.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
81-11-06 R1 BOEING: Amendment 39-4121 as amended by Amendment 39-4178. Applies to all 707/720 series airplanes, certificated in all categories.

A. Inspect stringers 5 and 7 and the adjacent lower wing skin from WS 265 through 470 for cracks using the specified methods at the times indicated. Skins/stringers found cracked must be repaired prior to further flight in a manner approved by the Chief, Seattle Area Aircraft Certification Office, FAA Northwest Region.

1. For 720/720B series airplanes:

Within 500 landings after the effective date of this Amendment and thereafter at intervals not to exceed 2,860 landings, conduct a low frequency eddy current inspection of the wing lower surface for cracks in the stringer/skin between wing stations 265 and 470 and stringers 5 and 7 in accordance with Boeing Service Bulletin A3395, Revision 2, dated October 10, 1980, or later FAA approved revisions, or in a manner approved by the Chief, Seattle Area Aircraft Certification Office.

2. For 707 series airplanes:

Inspect the wing lower surface for stringer/skin cracks between wing stations 265 and 470 and stringers 5 and 7. For the 707-300C airplanes, if ever used as a cargo airplane, inspect between wing Buttock Line 59.24 and wing station 470 and stringers 5 and 7. Inspect internally using high frequency eddy current or inspect externally using low frequency eddy current procedures as described in Boeing Service Bulletin A3395, Revision 3, dated July 17, 1981, or later FAA approved revisions or in a manner approved by the Chief, Seattle Area Aircraft Certification Office, FAA Northwest Region. Inspect in accordance with the table noted below.


AIRPLANE	THRESHOLD (Landings)	WITHIN
(Landings)	UNLESS ACCOMPLISHED Within the last Landings) External/Internal
Low Freq/High Freq	REPEAT INTERVAL (Landings) External/Internal Low Freq/High Freq
707-100/200	26,000	500	2,000/5,500	2,500/6,000
707-300/400	20,000	500	1,450/4,500	1,950/5,000
707-300B	17,000	500	1,150/3,700	1,150/3,700
707-300C (PAX)	17,000	500	1,200/3,700	1,700/4,200
707-300C (CGO)	17,000	500	400/1,600	900/2,100


B. Airplanes may be flown to a maintenance base for repairs or replacement in accordance with FAR 21.197 and FAR 21.199.

Alternate methods of compliance may be used when approved by the Chief, Seattle Area Aircraft Certification Office, Northwest Region.

The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1).

All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to The Boeing Company, P.O. Box 3707, Seattle, Washington 98124. These documents also may be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108.

NOTE: This supersedes AD 80-15-10 (Amdt. 39-3852; 45 FR 49910, July 28, 1980).

Amendment 39-4121 became effective June 29, 1981.

This Amendment 39-4178 becomes effective August 10, 1981.

FOOTER: