- Effective
- August 24, 1977
- Models
- D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA, D.H.114 Heron Series 2X
- Data sheet
- TCDSA-816
- Registered aircraft
- 1 matched by model
- Product
- Aircraft · Small/large airplane
- Amendment
- 39-2983
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
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On this page
The airworthiness directive
77-15-13 HAWKER SIDDELEY AVIATION, LTD: Amendment 39-2983. Applies to Model DH-114 airplanes certificated in all categories.
Compliance is required within the next 300 hours time in service after the effective date of this AD, unless already accomplished.
To prevent the possible seizure of the main landing gear damper ram, and consequent damage to the aircraft upon landing, accomplish the following:
(a) Modify the damper ram, P/N AC11164, in accordance with Part A of the section entitled "Accomplishment Instructions" of Dunlop Aviation Division Service Bulletin 32-824, dated April 5, 1973, or an FAA-approved equivalent.
(b) Upon completion of the modification specified in paragraph (a) of this AD, reidentify the modified damper ram as P/N AC65528, Mod. 1. (Hawker Siddeley Aviation, Ltd., Series: Heron (114), TNS. U.15, Issue 2, dated April 30, 1973, refers to this same subject.)
This amendment becomes effective August 24, 1977.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 1
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.