AD 71-20-02

final rule

Airworthiness Directives; Hawker Siddeley Model DH-114 Heron Airplanes

AD Number
71-20-02
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Unknown
FR Citation
This information is not available.

Applicability

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

Unsafe Condition

Failure of the emergency escape hatch lock mechanisms to open from outside the airplane could prevent rapid egress during an emergency.

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

Required Actions

Check operation of each escape hatch lock mechanism by turning the external handle with the internal handle stowed. Secure inoperable lock mechanisms to the escape hatch per Hawker Siddeley Technical News Sheet F.16 or FAA-approved equivalent. Complete securing of all lock mechanisms within 100 hours' time in service after the AD's effective date.

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

Compliance Time

within the next 100 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 Model DH-114 Heron Series 2A, 2DA, and 2X airplanes

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

Federal Register Abstract

Emergency Escape Hatches

Applicability Source Text

Show captured applicability text from the source AD
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Details
AD Number:
71-20-02
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Hawker Siddeley Model DH-114 Heron Airplanes
Subject:
Emergency Escape Hatches
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
09/23/1971
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: 71-20-02
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-1295

AD NUMBER:   71-20-02

SUBJECT HEADING:   Airworthiness Directives; Hawker Siddeley Model DH-114 Heron Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective September 23, 1971.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
71-20-02 HAWKER SIDDELEY: Amdt. 39-1295. Applies to Model DH-114 "Heron" airplanes.

Compliance is required as indicated.

To ensure that the emergency escape hatches (P/N's 14 FS.2991A, 4 FS.835A/1, or 4 FS.835A/2) can be opened from outside the airplane accomplish the following:

(a) Before further flight check the operation of each escape hatch lock mechanism by turning the external handle with the internal handle in the stowed position. The check required by this paragraph may be performed by the pilot.

(b) If an escape hatch lock mechanism is found to be inoperable during the check required by paragraph (a), before further flight, except that the airplane may be flown in accordance with FAR 21.197 to a base where the repairs can be performed, secure the inoperable lock mechanism to the escape hatch in accordance with Hawker Siddeley Aviation, Ltd., Technical News Sheet Series: Heron (114) No. F.16, Issue 1, dated March 15, 1971, or an FAA- approved equivalent.

(c) Within the next 100 hours' time in service after the effective date of this AD, unless already accomplished, secure the lock mechanism to each escape hatch in accordance with Hawker Siddeley Aviation, Ltd., Technical news Sheet Series: Heron (114) No. F.16, Issue 1, dated March 15, 1971, or an FAA-approved equivalent.

This amendment becomes effective September 23, 1971.

FOOTER:

Document Text

Show stored source text (verify against official source)
AD Final Rules - DRS_71-20-02.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
71-20-02
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Hawker Siddeley Model DH-114 Heron Airplanes
Subject:
Emergency Escape Hatches
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
09/23/1971
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: 71-20-02
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-1295

AD NUMBER:   71-20-02

SUBJECT HEADING:   Airworthiness Directives; Hawker Siddeley Model DH-114 Heron Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective September 23, 1971.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
71-20-02 HAWKER SIDDELEY: Amdt. 39-1295. Applies to Model DH-114 "Heron" airplanes.

Compliance is required as indicated.

To ensure that the emergency escape hatches (P/N's 14 FS.2991A, 4 FS.835A/1, or 4 FS.835A/2) can be opened from outside the airplane accomplish the following:

(a) Before further flight check the operation of each escape hatch lock mechanism by turning the external handle with the internal handle in the stowed position. The check required by this paragraph may be performed by the pilot.

(b) If an escape hatch lock mechanism is found to be inoperable during the check required by paragraph (a), before further flight, except that the airplane may be flown in accordance with FAR 21.197 to a base where the repairs can be performed, secure the inoperable lock mechanism to the escape hatch in accordance with Hawker Siddeley Aviation, Ltd., Technical News Sheet Series: Heron (114) No. F.16, Issue 1, dated March 15, 1971, or an FAA- approved equivalent.

(c) Within the next 100 hours' time in service after the effective date of this AD, unless already accomplished, secure the lock mechanism to each escape hatch in accordance with Hawker Siddeley Aviation, Ltd., Technical news Sheet Series: Heron (114) No. F.16, Issue 1, dated March 15, 1971, or an FAA-approved equivalent.

This amendment becomes effective September 23, 1971.

FOOTER:

Source: Official FAA Source ↗

Retrieved: Apr 8, 2026

Rights: U.S. Government Public Domain

This site is not affiliated with or endorsed by the FAA. Always verify with official sources.