AD 74-23-03

AD Final Rules - DRS_74-23-03.html
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AD Number:
74-23-03
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
BOEING Model 727 Series Airplanes
Subject:
Auto Pack Trip System
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
11/08/1974
Make:
The Boeing Company
Model:
727-100 Series | 727-100C Series | 727-200 Series | 727-200F Series | 727 Series | 727C 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Superseded AD: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Superseded By: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: 74-23-03
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-2003

AD NUMBER:   74-23-03

SUBJECT HEADING:   BOEING Model 727 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective November 8, 1974.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
74-23-03 BOEING: Amendment 39-2003. Applies to all Model 727 Series Airplanes certificated in all categories and equipped with the Auto Pack Trip System.
Compliance required as indicated unless already accomplished.
To prevent the inadvertent trip of both air conditioning packs and the subsequent rapid loss of cabin pressurization, accomplish the following:
(A) Within one calendar day after the effective date of this AD, as an interim action, during the first flight and on all subsequent flights until the action specified in paragraph (B) and (C) of this AD has been accomplished, control the Auto Pack Trip System in accordance with the information and procedures contained in Boeing 727 "Operations Manual Bulletin" Number 74-7 dated September 5, 1974; and
(B) Within 100 hours time in service after the effective date of this AD, unless paragraph (C) is already accomplished, collar the Auto Pack Trip circuit breaker on the P6 panel and install one placard adjacent to the circuit breaker and one adjacent to the Auto Pack Trip Switch which reads, "Auto Pack Trip Inoperative".
(C) As terminating action of this AD, within the next 900 hours time in service after the effective date of this AD, modify the Auto Pack Trip System in accordance with the information contained in the following documents as applicable, or a method approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region:
(1) Boeing Alert Service Bulletin 727-36-21 dated September 20, 1974, or later FAA approved revisions, applies to 727-200 series airplanes.
(2) Boeing Service Bulletin 727-36-17, Revision 2, dated October 4, 1974, or later FAA approved revisions, applies to the following 727-100 series airplanes if Boeing Service Bulletin 727-36-17 original issue and Revision 1 have been incorporated:

727-116 S/N 19811
727-116C S/N 19813 and 19814
727-21 S/N 18992 thru 18999
727-21 S/N 19005 thru 19007
727-21 S/N 19035 thru 19038
727-21 S/N 19257 thru 19262
727-21C S/N 19134 thru 19137

(3) Boeing Service Bulletin 727-36-18, Revision 1, dated October 4, 1974, or later FAA approved revisions, applies to the following 727-100 series airplanes if Boeing Service Bulletin 727-36-18 has been incorporated:

727-155C S/N 19619

(4) Boeing Service Bulletin 727-36-22 dated October 4, 1974, or later FAA approved revisions, applies to the following 727-100 series airplanes:

727-17 S/N 20327 and 20328;
S/N 20512 and 20513
727-41 S/N 20422 thru 20426
727-113C S/N 20343
727-1H2 S/N 20533
727-1F8 S/N 20421
727-C3 S/N 20418 thru 20420

The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this Directive who have not already received these documents from the manufacturer, may obtain copies upon request to the Boeing Commercial Airplane Company, P. O. Box 3707, Seattle, Washington 98124. These documents may be examined at FAA Northwest Region, 9010 East Marginal Way, Seattle, Washington 98108.

This amendment becomes effective November 8, 1974.

FOOTER: