237299-1937-Notice-to-Aircraft-Owners-and-Ground-Engineers-No-16-of-1937 — Page 1

908

THE HONG KONG GOVERNMENT GAZETTE, DECEMBER 10, 1937.

No. 898.

DIRECTORATE OF AIR SERVICES,

HONG KONG,

Notice to Aircraft Owners and Ground Engineers.

No. 16 of the year 1937

FLEXIBLE TUBING FOR USE IN AIRCRAFT

FUEL AND OIL SYSTEMS.

1. Petro-Flex, Superflexit and Avioflexus tubing used in civil aircraft must conform to the following D. T. D. Specifications:

Petro-Flex.-D.T.D. No. 1009. Avioflexus.-D.T.D. No. 1015.

Superflexit.-D.T.D. No. 1014.

and may be used only for the purposes indicated below:-

(i) Petro-Flex may be used for fuel systems but not for oil systems.

(ii) Avioflexus may be used for both fuel systems and oil systems.

(iii) Superflexit may be used for fuel systems, and for oil systems where the temperature of the oil does not exceed 100° C.

2. The above types of tubing must be obtained in the required lengths complete with end fittings, and no attempt. must be made either to repair the tubing or to fit new end fittings. When a length of tubing becomes unserviceable, a new length must be fitted.

3. When installing flexible tubes in aircraft fuel or oil systems, it is necessary to ensure that they are not bent to smaller radi than those listed in the following table, the radius in each case being measured to the centre of the tubing:

ཨ

Type of Tubing

Avioflexus

Petro-Flex

Superflexit

3 "

21"

11′′

"

3"

4

13′′

16

8

1200 100 100

5 "

31′′

15"

3"

13"

"

51"

21"

61"

21′′

100 00/00 1000 201 -100

-100 09/00

22/00 साल नाबा

11"

13"

15′′

13" 4

21"

21"

"

7"

3"

3"

31"

31"

1′′

8"

4′′

4′′