593633-1939-Notice-to-Aircraft-Owners-and-Ground-Engineers--No-1-of-1939 — Page 1

THE HONG KONG GOVERNMENT GAZETTE, AUGUST 11, 1939.

No. 652.

DIRECTORATE OF AIR SERVICES, HoNo Kova.

Notice to Aircraft Owners and Ground Engineers

No. 1 of 1939.

LANDING LIGHTS.

1. On and after the 1st January, 1940, aircraft are to be equipped with landing lights (lamp on wing tip planes) for flights by night when passengers or goods are carried for hire or reward, or whether for hire and reward or not where the carriage is effected by an air transport undertaking, or when a pilot qualifying for a Class "B" licence is carrying out night flying tests.

2. When landing lights are fitted to a civil aircraft in order to comply with the requirements in respect of the particular flights referred to in paragraph 1 above, the lamps or flares must be of an approved type. Application for the approval of new types of landing lights should be made to the Director of Air Services, and the procedure to obtain approval will be in accordance with that laid down in leaflet A8 of Vol. 1 of Air Publication 1208, Airworthiness Handbook of Civil Aviation.

3. The following types of landing light have already been approved for use in civil aircraft, and must be used in con- junction with the type or types of bulb recommended by the manufacturers of the lamp. It should be noted, however, that lamps absorbing less than 200 watts do not, in general, provide sufficient illumination for landing purposes. specification of suitable filament lamps of 200, 240 and 350 watts which have been standardized is to be issued shortly.

A

4. The voltages quoted are the nominal voltages of the lighting system, and it is not necessarily safe to apply these voltages direct to the lamp terminals, as in some cases the bulbs have been designed on the assumption of a certain voltage drop in the wiring.

(1) LANDING LAMPS.

Harley.

Type.

6A 6" Leading edge 12 v. 135, 144 and 264 watts. Single or double filament bulb. Mount-

Drawing No. and Date.

ing, behind transparent panel. 17100-4/11/37 GB 6" Leading edge 12 v. 135, 144 and 264 watts. Single or double filament bulb. Mount- ing as in 6A, but with pivot

centres

17090-30/6/37

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