AD 77-12-03

final rule

Airworthiness Directives; Hawker Siddeley Aviation, Ltd Model DH-114 Airplanes

AD Number
77-12-03
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Unknown
FR Citation
This information is not available.
Technical illustration of an aircraft turbine engine assembly
Problem area Engine

Applicability

TypeManufacturerModelDetails
aircraft de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A Airworthiness Directives; Hawker Siddeley Aviation, Ltd Model DH-114 Airplanes
aircraft de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2DA Airworthiness Directives; Hawker Siddeley Aviation, Ltd Model DH-114 Airplanes
aircraft de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2X Airworthiness Directives; Hawker Siddeley Aviation, Ltd Model DH-114 Airplanes

Unsafe Condition

Internal corrosion of the engine mount stay strut, part number 14 EM.337A, could lead to structural failure of the strut.

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

Required Actions

Remove the stay strut and inspect using X-ray procedure per Hawker Siddeley Technical News Sheet No. E.8 or FAA-approved equivalent. Replace any strut showing internal corrosion with a new or serviceable part of the same part number free of corrosion.

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

Compliance Time

within the next 50 hours time in service after the effective date of this AD

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

Affected Aircraft

Hawker Siddeley Aviation, Ltd Model DH-114 airplanes (D.H.114 Heron Series 2A, 2DA, 2X) not equipped with engine mount stay struts marked Issue 2 or subsequent or marked 'DOI No. 68640'

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

Federal Register Abstract

Engine Mount Stay Strut

Applicability Source Text

Show captured applicability text from the source AD
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Details
AD Number:
77-12-03
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Hawker Siddeley Aviation, Ltd Model DH-114 Airplanes
Subject:
Engine Mount Stay Strut
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
07/18/1977
Make:
de Havilland Aircraft Co., Ltd., The
Model:
D.H.114 Heron Series 2A | D.H.114 Heron Series 2DA | D.H.114 Heron Series 2X
Product Type:
Aircraft
Product Subtype:
Small/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: 77-12-03
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-2920

AD NUMBER:   77-12-03

SUBJECT HEADING:   Airworthiness Directives; Hawker Siddeley Aviation, Ltd Model DH-114 Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective July 18, 1977.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
77-12-03 HAWKER SIDDELEY AVIATION, LTD: Amendment 39-2920. Applies to Model DH-114 airplanes, certificated in all categories, that are not equipped with engine mount stay struts marked as Issue 2 or subsequent or marked "DOI No. 68640."

Compliance is required within the next 50 hours time in service after the effective date of this AD, unless already accomplished.

To detect internal corrosion of the engine mount stay strut, P/N 14 EM.337A, accomplish the following:

(a) Remove the stay strut from the aircraft and inspect in accordance with the X-ray procedure of Appendix I of Hawker Siddeley Technical News Sheet No. E.8, dated March 19, 1973, or an FAA-approved equivalent.

(b) Replace any strut for which internal corrosion is detected by the inspection required by paragraph (a) of this AD with a new part or otherwise serviceable spare part of the same part number determined to be free of internal corrosion by the inspection required by paragraph (a) of this AD or an FAA-approved equivalent.

(c) It is requested that copies of the X-rays, or results of an FAA-approved equivalent inspection, be forwarded to the Chief, Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Region, c/o American Embassy, APO New York, N.Y. 09667. (Reporting approved by the Office of Management and Budget under OMB No. 04-RO-174).

This amendment becomes effective July 18, 1977.

FOOTER:

Document Text

Show stored source text (verify against official source)
AD Final Rules - DRS_77-12-03.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
77-12-03
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Hawker Siddeley Aviation, Ltd Model DH-114 Airplanes
Subject:
Engine Mount Stay Strut
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
07/18/1977
Make:
de Havilland Aircraft Co., Ltd., The
Model:
D.H.114 Heron Series 2A | D.H.114 Heron Series 2DA | D.H.114 Heron Series 2X
Product Type:
Aircraft
Product Subtype:
Small/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: 77-12-03
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-2920

AD NUMBER:   77-12-03

SUBJECT HEADING:   Airworthiness Directives; Hawker Siddeley Aviation, Ltd Model DH-114 Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective July 18, 1977.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
77-12-03 HAWKER SIDDELEY AVIATION, LTD: Amendment 39-2920. Applies to Model DH-114 airplanes, certificated in all categories, that are not equipped with engine mount stay struts marked as Issue 2 or subsequent or marked "DOI No. 68640."

Compliance is required within the next 50 hours time in service after the effective date of this AD, unless already accomplished.

To detect internal corrosion of the engine mount stay strut, P/N 14 EM.337A, accomplish the following:

(a) Remove the stay strut from the aircraft and inspect in accordance with the X-ray procedure of Appendix I of Hawker Siddeley Technical News Sheet No. E.8, dated March 19, 1973, or an FAA-approved equivalent.

(b) Replace any strut for which internal corrosion is detected by the inspection required by paragraph (a) of this AD with a new part or otherwise serviceable spare part of the same part number determined to be free of internal corrosion by the inspection required by paragraph (a) of this AD or an FAA-approved equivalent.

(c) It is requested that copies of the X-rays, or results of an FAA-approved equivalent inspection, be forwarded to the Chief, Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Region, c/o American Embassy, APO New York, N.Y. 09667. (Reporting approved by the Office of Management and Budget under OMB No. 04-RO-174).

This amendment becomes effective July 18, 1977.

FOOTER:

Source: Official FAA Source ↗

Retrieved: Apr 8, 2026

Rights: U.S. Government Public Domain

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