AD 72-06-03
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" Series Airplanes |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H.114 Heron Series 2DA | Airworthiness Directives; Hawker Siddeley Model DH-114 "Heron" Series Airplanes |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H.114 Heron Series 2X | Airworthiness Directives; Hawker Siddeley Model DH-114 "Heron" Series Airplanes |
Unsafe Condition
Hazardous internal corrosion of the tubular structure of engine mounting frames, part numbers 14EM11A and 12A.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct x-ray inspections of engine mounting frames per Hawker Siddeley Technical News Sheet Heron (114) No. E.3, Issue 1/Issue 3 or later approved versions. Replace or repair frames with internal corrosion before further flight using approved instructions.
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Compliance Time
Within four years after the effective date of this AD (April 6, 1972), unless already accomplished within the last four years, and thereafter every four years. For modified frames (No. 1529), within four years after modification or one year after AD effective date (whichever is later), then every four years. For frames prefixed 'S4/DHB...' or 'BGB/DHB...', within 10 years from manufacture, then every four years.
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, 2X with engine mounting frames serial numbers DHB/1 and subsequent, prefixed 'DH/...', or 'S4/DHB...'/'BGB/DHB...' (manufactured to Modification No. 1529 standards).
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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