AD 72-12-05

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AD Number:
72-12-05
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Hawker Siddeley Model DH-114 "Heron" Airplanes
Subject:
Landing Gear Jack Assemblies
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
Make:
de Havilland Aircraft Co., Ltd., The
Model:
D.H.114 Heron Series 2A | D.H.114 Heron Series 2DA | D.H.114 Heron Series 2X
Product Type:
Aircraft
Product Subtype:
Small/Large Airplane
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 72-12-05
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-1458

AD NUMBER:   72-12-05

SUBJECT HEADING:   Airworthiness Directives; Hawker Siddeley Model DH-114 "Heron" Airplanes

ACTION:  

SUMMARY:  

DATES:  

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
72-12-05 HAWKER SIDDELEY AVIATION LTD.: Amdt. 39-1458. Applies to Hawker Siddeley deHavilland Model DH-114 "Heron" airplanes which do not have Modification 1161 incorporated on all of the main landing gear and nose landing gear operating jacks.

Compliance required as indicated.

To prevent the possible failure of the main or nose landing gear operating jacks accomplish the following:

(a) Within the next 50 landings after the effective date of this AD, or before accumulating a total of 5,000 landings on a piston, P/N AHO 19742, in an operating jack assembly, whichever occurs later

(1) Replace the affected operating jack assembly with a serviceable jack assembly which has been modified to incorporate piston, P/N ACO 23389, (Modification 1161) in accordance with de Havilland Aircraft Service, Modification News Sheet No. Heron 1161, dated March 17, 1958, or an FAA-approved equivalent, or

(2) Replace the piston in each affected operating jack assembly with a new piston of the same part number and thereafter continue to replace P/N AHO 19742 pistons at intervals not to exceed 5,000 landings.

(b) Operators who have not kept records of the number of landings on individual pistons, P/N AHO 19742, shall substitute the total number of airplane landings accumulated in lieu thereof.

(de Havilland Aircraft Service, Technical News Sheet, Series: Heron (114) No. S.2 dated March 1, 1959, covers this same subject.)

This amendment is effective upon publication in the Federal Register as to all persons except those persons to whom it was made immediately effective upon receipt of the airmail letter dated April 20, 1972, which contained this amendment.

FOOTER: