AD 86-05-01

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AD Number:
86-05-01
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
BOEING Model 747 Series Airplanes
Subject:
Forward Engine Mount Nuts
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
03/24/1986
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Superseded AD: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Superseded By: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: 86-05-01
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-5246

AD NUMBER:   86-05-01

SUBJECT HEADING:   BOEING Model 747 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective March 24, 1986.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
86-05-01 BOEING: Amendment 39-5246. Applies to all Model 747 series airplanes equipped with Rolls Royce engines, certificated in any category, listed in Boeing Alert Service Bulletin 747-71A2216, dated December 20, 1985.

To detect faulty self-locking nuts that could lead to separation of an engine, accomplish the following, unless already accomplished:

A. Within 30 days after the effective date of this AD, perform a one-time inspection of the forward engine mount nuts for adequate self-locking torque, in accordance with Boeing Alert Service Bulletin 747-71A2216, dated December 20, 1985, or later FAA-approved revisions.

B. Defective nuts must be replaced prior to further flight.

C. Upon the request of an operator, an FAA Principal Maintenance Inspector, subject to prior approval of the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region, may adjust the inspection time in this AD to permit compliance at an established inspection period of that operator, if the request contains substantiating data to justify the change for that operator.

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

E. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and/or modifications required by this AD.

All persons affected by this proposal who have not already received information on inspection procedures from the manufacturer may obtain copies upon request to the Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124-2207. This information may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington.

This amendment becomes effective March 24, 1986.

FOOTER: