AD 77-13-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H.114 Heron Series 2A | Airworthiness Directives; Hawker Siddeley Aviation, Limited Model DH-114 Airplanes |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H.114 Heron Series 2DA | Airworthiness Directives; Hawker Siddeley Aviation, Limited Model DH-114 Airplanes |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H.114 Heron Series 2X | Airworthiness Directives; Hawker Siddeley Aviation, Limited Model DH-114 Airplanes |
Unsafe Condition
Corrosion and cracking of the drag brace fittings at the center section spar lower cap could lead to structural failure of the wing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect drag brace fittings P/N 4 FS.1797(L.H.) and 4 FS.1798(R.H.) for corrosion and cracks within 50 hours time-in-service after the effective date. If cracks or severe corrosion are found, replace with improved fittings P/N 14FS.6069 (L.H.) or 14FS.6070 (R.H.) before further flight. For surface corrosion, remove and protect corrosion then reinspect within 100 hours time-in-service. Repeat inspections every 100 hours until improved fittings are installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 50 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 Aviation, Limited Model DH-114 airplanes (D.H.114 Heron Series 2A, 2DA, 2X) except those modified with Hawker Siddeley Modification 1102 or 1103.
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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