AD 71-20-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| 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.
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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.
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Compliance Time
within the next 100 hours' time in service after the effective date of this AD
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Affected Aircraft
Hawker Siddeley Model DH-114 Heron Series 2A, 2DA, and 2X airplanes
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Federal Register Abstract
Emergency Escape Hatches
Applicability Source Text
Show captured applicability text from the source AD
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Heron Series 2DA | D.H.114 Heron Series 2X Product Type: Aircraft Product Subtype: Small/Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 71-20-02 CITATION: This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:
Document Text
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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:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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