AD 88-05-07

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AD Number:
88-05-07
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; BOEING Model 747 Series Airplanes
Subject:
Auxiliary Power Unit Drain System
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
03/25/1988
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Superseded AD: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Superseded By: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: 88-05-07
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-5867

AD NUMBER:   88-05-07

SUBJECT HEADING:   Airworthiness Directives; BOEING Model 747 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective March 25, 1988.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
88-05-07 BOEING: Amendment 39-5867. Applies to Model 747 series airplanes, as listed in Boeing Service Bulletin 747-49-2051, dated November 5, 1987, certificated in any category.
Compliance required as indicated, unless previously accomplished.

To eliminate the potential for a fire due to fuel leaking from the auxiliary power unit (APU) drain system, accomplish the following:

A. Within the next 30 days after the effective date of this AD, and at intervals not to exceed 30 days thereafter, inspect the APU fuel supply line for fuel leaks, in accordance with Boeing Model 747 Maintenance Manual Section 28-25-00, page 601, dated August 25, 1987, or later FAA-approved revision. If leakage is detected, repair in accordance with the Maintenance Manual, before further flight.

B. Modification of the APU fuel line drain system, fuel pump drain, and turbine drain assembly, in accordance with Boeing Service Bulletin 747-49-2051, dated November 5, 1987, or later FAA-approved revision, constitutes terminating action for the repetitive inspection requirement of paragraph A., above.

C. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety and which has the concurrence of an FAA Principal Maintenance Inspector, may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.

D. Special flight permits may be issued in accordance with FAR 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 the Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124. This information may be examined at FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or Seattle Aircraft Certification Office, FAA, Northwest Mountain Region, 9010 East Marginal Way South, Seattle, Washington.

This amendment becomes effective March 25, 1988.

FOOTER: