AD 81-21-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H.114 Heron Series 2A | Airworthiness Directives; British Aerospace Model DH-114 Heron Series 1B and All Series 2 Airplanes |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H.114 Heron Series 2DA | Airworthiness Directives; British Aerospace Model DH-114 Heron Series 1B and All Series 2 Airplanes |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H.114 Heron Series 2X | Airworthiness Directives; British Aerospace Model DH-114 Heron Series 1B and All Series 2 Airplanes |
Unsafe Condition
Wing leading edge access doors may not remain properly secured, which could result in door failure during flight.
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Required Actions
Modify the wing leading edge access doors in accordance with British Aerospace Corp. Manufacturer's Technical News Sheet W.1 1, Issue 2, and Modification No. Heron 1171 (Amendment No. 1 incorporated) dated October 17, 1961, or later FAA approved revisions. Alternate means of compliance may be used if approved by the Chief, Seattle Area Aircraft Certification Office.
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Compliance Time
Within 350 hours time in service after the effective date of this AD
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Affected Aircraft
British Aerospace Model DH-114 Heron Series 1B and all series 2 airplanes modified with Modification 154 or 469
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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