AD 90-15-14

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AD Number:
90-15-14
Document Type:
AD Final Rules
Docket Number:
89-NM-249-AD
Subject Heading:
Airworthiness Directives; BOEING Model 737-300 and 737-400 Series Airplanes
Subject:
Fire Detection System
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
08/23/1990
Make:
The Boeing Company
Model:
737-300 Series | 737-400 Series
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Superseded AD: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Superseded By: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: 90-15-14
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   89-NM-249-AD

AMENDMENT:   39-6665

AD NUMBER:   90-15-14

SUBJECT HEADING:   Airworthiness Directives; BOEING Model 737-300 and 737-400 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective August 23, 1990.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
90-15-14 BOEING: Amendment 39-6665. Docket No. 89-NM-249-AD.

Applicability: Model 737-300 and 737-400 series airplanes, equipped with Kidde engine fire and overheat detection systems, as listed in Boeing Service Bulletin 737-26-1055, Revision 1, dated September 14, 1989, certificated in any category.

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

To reduce false engine fire and overheat warnings, which could result in unnecessary engine in-flight shutdowns and airplane diversions that unduly jeopardize continued safe operation of the airplane, accomplish the following:

A. Modify the engine fire and overheat detection system on each engine in accordance with Boeing Service Bulletin 737-26-1055, Revision 1, dated September 14, 1989.

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 (ACO), FAA, Transport Airplane Directorate.

NOTE: The request should be submitted directly to the Manager, Seattle ACO, and a copy sent to the cognizant FAA Principal Inspector (PI). The PI will then forward comments or concurrence to the Seattle ACO.

C. Special flight permits may be issued in accordance with FAR Sections 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of 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 Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or at the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington.

This amendment (39-6665, AD 90-15-14) becomes effective on August 23, 1990.

FOOTER: