AD 90-20-07

final rule

Airworthiness Directives; British Aerospace Model BAC 1-11 200 and 400 Series Airplanes

AD Number
90-20-07
Status
final_rule
Effective Date
Product Category
aircraft
Docket
90-NM-102-AD
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
aircraft Airbus SAS BAC 1-11 200 Series Airworthiness Directives; British Aerospace Model BAC 1-11 200 and 400 Series Airplanes
aircraft Airbus SAS BAC 1-11 400 Series Airworthiness Directives; British Aerospace Model BAC 1-11 200 and 400 Series Airplanes

Unsafe Condition

Failure of the APU air intake plenum overheat detection could result in undetected overheating and potential structural damage.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Install temperature sensors in the APU air intake plenum per British Aerospace Alert Service Bulletin 49-A-PM5955, Issue 1, dated April 13, 1988. Alternate means of compliance or adjustments may be approved by the FAA Manager, Standardization Branch, ANM-113.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

within 30 days after the effective date of this AD

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

British Aerospace Model BAC 1-11 200 and 400 Series airplanes, certificated in any category.

AI-generated summary from the source AD text. Verify against the official source before acting.

Federal Register Abstract

APU Air Intake Plenum

Applicability Source Text

Show captured applicability text from the source AD
AD Final Rules - DRS_90-20-07.html
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AD Number:
90-20-07
Document Type:
AD Final Rules
Docket Number:
90-NM-102-AD
Subject Heading:
Airworthiness Directives; British Aerospace Model BAC 1-11 200 and 400 Series Airplanes
Subject:
APU Air Intake Plenum
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
10/23/1990
Make:
Airbus SAS
Model:
BAC 1-11 200 Series | BAC 1-11 400 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Superseded AD: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Superseded By: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: 90-20-07
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   90-NM-102-AD

AMENDMENT:   39-6729

AD NUMBER:   90-20-07

SUBJECT HEADING:   Airworthiness Directives; British Aerospace Model BAC 1-11 200 and 400 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective on October 23, 1990.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
90-20-07 BRITISH AEROSPACE: Amendment 39-6729. Docket No. 90-NM-102-AD.

Applicability: Model BAC 1-11 200 and 400 series airplanes, certificated in any category.

Compliance: Required within 30 days after the effective date of this AD, unless previously accomplished.

To provide auxiliary power unit (APU) air intake plenum overheat detection, accomplish the following:

A. Install temperature sensors in the APU air intake plenum, in accordance with British Aerospace Alert Service Bulletin 49-A-PM5955, Issue 1, dated April 13, 1988.

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, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate.

NOTE: The request should be submitted directly to the Manager, Standardization Branch, ANM-113, and a copy sent to the cognizant FAA Principal Inspector (PI). The PI will then forward comments or concurrence to the Manager, Standardization Branch, ANM-113.

C. 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 British Aerospace PLC, Librarian for Service Bulletins, P.O. Box 17414, Dulles International Airport, Washington, D.C. 20041-0414. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington.

This amendment (39-6729, AD 90-20-07) becomes effective on October 23, 1990.

FOOTER:

Document Text

Show stored source text (verify against official source)
AD Final Rules - DRS_90-20-07.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
90-20-07
Document Type:
AD Final Rules
Docket Number:
90-NM-102-AD
Subject Heading:
Airworthiness Directives; British Aerospace Model BAC 1-11 200 and 400 Series Airplanes
Subject:
APU Air Intake Plenum
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
10/23/1990
Make:
Airbus SAS
Model:
BAC 1-11 200 Series | BAC 1-11 400 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: 90-20-07
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   90-NM-102-AD

AMENDMENT:   39-6729

AD NUMBER:   90-20-07

SUBJECT HEADING:   Airworthiness Directives; British Aerospace Model BAC 1-11 200 and 400 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective on October 23, 1990.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
90-20-07 BRITISH AEROSPACE: Amendment 39-6729. Docket No. 90-NM-102-AD.

Applicability: Model BAC 1-11 200 and 400 series airplanes, certificated in any category.

Compliance: Required within 30 days after the effective date of this AD, unless previously accomplished.

To provide auxiliary power unit (APU) air intake plenum overheat detection, accomplish the following:

A. Install temperature sensors in the APU air intake plenum, in accordance with British Aerospace Alert Service Bulletin 49-A-PM5955, Issue 1, dated April 13, 1988.

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, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate.

NOTE: The request should be submitted directly to the Manager, Standardization Branch, ANM-113, and a copy sent to the cognizant FAA Principal Inspector (PI). The PI will then forward comments or concurrence to the Manager, Standardization Branch, ANM-113.

C. 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 British Aerospace PLC, Librarian for Service Bulletins, P.O. Box 17414, Dulles International Airport, Washington, D.C. 20041-0414. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington.

This amendment (39-6729, AD 90-20-07) becomes effective on October 23, 1990.

FOOTER:

Source: Official FAA Source ↗

Retrieved: Apr 8, 2026

Rights: U.S. Government Public Domain

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