AD 89-07-13

AD Final Rules - DRS_89-07-13.html
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AD Number:
89-07-13
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; BOEING Model 737 Series Airplanes
Subject:
Generator Control Unit Filter
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
04/28/1989
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Superseded AD: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Superseded By: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: 89-07-13
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-6165

AD NUMBER:   89-07-13

SUBJECT HEADING:   Airworthiness Directives; BOEING Model 737 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective April 28, 1989.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
89-07-13 BOEING: Amendment 39-6165.
Applicability: Model 737 series airplanes, certificated in any category.

Compliance: Required within the next 18 months after the effective date of this AD, unless previously accomplished.

To prevent smoke in the cockpit and partial loss of electrical power caused by the failures of the Generator Control Unit (GCU) filter modules, accomplish the following:

A. Replace or modify the GCU filter modules, in Westinghouse GCU P/N 915F212- 5 and GCU P/N 948F458-1, in accordance with Westinghouse Service Bulletin 87-101, dated March 1987, or Westinghouse Service Bulletin 87-102, dated August 1987.

B. 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.

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who may add any comments and then send it to the Manager, Seattle Aircraft Certification Office.

C. 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 the modification by this AD.

All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to Westinghouse, Electrical Systems Division, P.O. Box 989, Lima, Ohio 45802. These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Seattle Aircraft Certification Office, FAA, 9010 East Marginal Way South, Seattle, Washington.

This amendment (39-6165, 89-07-13) becomes effective on April 28, 1989.

FOOTER: