AD 86-11-01 R1

AD Final Rules - DRS_86-11-01_R.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
86-11-01 R1
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
BOEING Model 747 Airplanes
Subject:
Inner and Outer Wheel Bearings
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
02/26/1987
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Superseded AD: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Superseded By: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: 86-11-01 R1
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-5550

AD NUMBER:   86-11-01 R1

SUBJECT HEADING:   BOEING Model 747 Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective February 26, 1987.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
86-11-01 R1 BOEING: Amendment 39-5322 as amended by Amendment 39-5550. Applies to all Model 747 airplanes, certificated in any category. To prevent wheel or tire failure as a result of failure of the wheel bearing, accomplish the following, unless already accomplished:

A. Within 100 flight cycles after the effective date of this AD, remove and inspect both the inner and outer wheel bearings, Timken P/N's LM229146 and LM229139, in accordance with the applicable portions of Sections 32-45-01 through 32-45-03 of the Boeing Model 747 maintenance manual. Any wheel bearing found damaged must be replaced with a new or serviceable bearing prior to further flight.

NOTE: Serviceable bearings are those Timken bearings, P/N's LM229146 and LM229139, which have been inspected with a close visual inspection and found to have no visible damage (i.e., galling, gouging, spalling, overheat, etc.).

B. After accomplishment of the inspection required by paragraph A., above, reinspect both the inner and outer wheel bearings in accordance with the schedule below. Any wheel bearing found damaged as a result of the required inspections must be replaced with a new or serviceable bearing before further flight.

1. Bearings P/N LM229146 and LM229139, date stamped LS and subsequent, except those identified in subparagraph B.2., below, must be reinspected at intervals not to exceed 100 flight cycles.

2. Bearings date stamped LS and subsequent, which are installed on Boeing Model 747SR airplanes which have not incorporated Boeing Service Bulletin 747-32-2272 (which relates to gross weight increase), must be reinspected at intervals not to exceed 200 flight cycles.

C. Installation of inner and outer Timken wheel bearings, P/N's LM229147C and LM229140C, constitutes terminating action for the repetitive inspections required by paragraph B., above.

D. An alternate means of compliance or adjustment of the compliance time, which provides 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 an airplane to a base for the accomplishment of inspections and/or modifications required by this AD.

The service information specified in this AD may be obtained upon request to the Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124. It may also 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.

Amendment 39-5322 became effective June 13, 1986.
This amendment, 39-5550, becomes effective February 26, 1987.

FOOTER: