AD 71-13-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H.114 Heron Series 2A | Airworthiness Directives; Hawker Siddeley Aviation Model DH-114 Heron Airplanes |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H.114 Heron Series 2DA | Airworthiness Directives; Hawker Siddeley Aviation Model DH-114 Heron Airplanes |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H.114 Heron Series 2X | Airworthiness Directives; Hawker Siddeley Aviation Model DH-114 Heron Airplanes |
Unsafe Condition
Failure of the Dunlop compressed air bottles used in the emergency landing gear extension system and emergency braking system.
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Required Actions
Inspect air bottles (P/N AH.7360, AC.11038, AC.10685) in emergency systems. Replace assemblies with serviceable ones having bottles manufactured on or after January 1, 1959, if the existing bottles were made before that date. The date is etched on the collar.
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Compliance Time
on or before August 31, 1971
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Affected Aircraft
Hawker Siddeley Aviation Model DH-114 Heron Series 2A, 2DA, 2X airplanes with emergency landing gear extension system air bottle assemblies (P/N AC.11768) or Modification 281 (Emergency Braking System) with air bottle assemblies (P/N ACM.16784).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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