THE HONG KONG GOVERNMENTI GAZETTE, DECEMBER 17, 1937.
No., 917.
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dum ko se
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Directorate OF AIR SERVICES, HONG KONG.
Notice to Aircraft Owners and Ground Engineers. Srofio ad a
No. 17 of the year 1937.
VARIABLE PITCH AIRSCREWS AND THEIR CONTROLS :
· DUTIES OF GROUND ENGINEERS.
„DHOLY
1. The Air Navigation Directions, (Hong Kong) 1932, (No. 1) require that the daily certification in respect of each aircraft engine and engine installation, shall be made by a ground engineer licensed in Category "O".
2. The duties devolving on ground engineers dealing with variable pitch airscrews which are fitted to aircraft engines, or are undergoing repair or overhaul, are shown hereunder.
3. The holder of a valid "O" licence with endorsement permitting certification of an engine fitted with a variable pitch airscrew, will, in regard to such airscrew, be respon- sible for verifying the safety of details and assembly of the airscrew and its controlling mechanism, for effecting checks of correct balance, and for verifying the proper attachment and functioning of the airscrew and control to the engine. Such licensee may certify the correct assembly of an airscrew and controlling mechanism after the renewal of parts not involving fitting or machining operations, and the rectifica- tion of minor damage to the edges and faces of solid metal blades. The correction of distorted blades may not be certified by such licensee.
4. The holder of a valid "X" licence in respect of variable pitch airscrews may, in addition to certifying the work shown in the latter portion of the preceding paragraph, also certify major overhauls such as include the assembly of new parts requiring fitting or machining operations and the rectification of distorted blades within "cold setting" limits.
5. In order to give effect to the change brought about by the introduction of engines fitted with variable pitch airscrews, all existing "C" licences at the time of renewal and new "O" licences at the time of issue, will be endorsed to exclude the certification of variable pitch airscrews in those instances where the holder of the licence has not passed the examination relating to the certification of such engines.
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