AD 72-20-01
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
Fatigue failure of the primary airplane structure, including wing assemblies, fuselage center section lower spar booms, vertical fin front attachment fittings, and elevator trim tab connecting rods.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace airframes and components before accumulating 30,000 hours' time in service. Incorporate specific modifications (e.g., 492, 520, 1585) or rework wing assemblies per specified drawings. Replace wing assemblies with modified versions or rework them by incorporating multiple structural modifications. Replace vertical fin fittings and elevator trim tab components as specified.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before the accumulation of the total hours' time in service specified in Column B for the applicable component, or within the next 100 hours' time in service after the effective date of this AD, whichever occurs later.
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 airplanes.
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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