January, 1939 AIRCRAF T ENGINEERING Workshop and Production Section Civil Specification Memorandum No. 3—"Dial No . 29 of the year 1938 Vacuum Oil Company, Ltd., previously sold their Instruments , Marking of." product s have been discontinued, owing to the 1. Cases have been reported where the elevator (Notice to Aircraft Owners and Ground Engineers merging of these two companies in a new company, bias cable of B.A. Swallow II aeroplanes has caught No. 5/1937.) known as Intava, Limited. on the rudder pedal securing pin when the bias Civil Specification Memorandum No. 7—"Lis t of 2. Authority is hereb y given for the use in aircraft level is in the rearmost position. This has the Approved Firms." engines of the Intava oil stated by Intava, Limited, effect of making the rudder and elevators stiff to (Notice to Aircraft Owners and Ground Engineers to be to the same specification as any Anglo- operate, and may lead to an accident. No. 31/1937.) American Oil Company or Vacuum Oil Company 2. All B.A. Swallow II aeroplanes must be Civil Specification Memorandum No. 16—"Issue oil quoted in the engine log book. inspected to ensure tha t the rudder bar check cable of Civil Specification No. 18." October 10, 1938. is correctly adjusted. This will limit the movement (Notice to Aircraft Owners and Ground Engineers of the trailing edge of the rudder at the maximum No. 26/1938.) No . 32 of the year 1938 chord to 300 mm. on each side. 3. The following is a complete list of current 3. In addition, a piece of 3/16-in. elastic cord, 1. An instance has occurred of the cabin roof of Civil Specifications: 16 in . in length including attachments, should be a Hillson "Praga " aeroplane opening during flight C.S. No. 1 (April, 1936).—Altimeters. fitted between the front end of the existing ½-in. owing t o the locking rods being insecurely fastened. C.S. No. 2 (April, 1936).—Air Speed Indicators. elastic cord of the elevator bias gear and the front 2. The locking arrangements have therefore been C.S. No. 3A (Feb., 1938).—Pressure Heads for bolt of the existing safety belt attachment fitting modified to include a stirrup which engages with Air Speed Indicators. on the right-hand side of the aeroplane. This will notches cut in the lock handle. C.S. No. 4 (April, 1936).—Engine Speed Indica maintai n the tension in the elevator bias cable 3 . This modification is shown on Drawing tors . when the operating lever is in th e rearmost position. No. 15358, Issue 1, dated 5.9.38, and must be C.S. No. 5 (April, 1936).—Pressure Gauges for 4. Those aeroplanes which have already been incorporated on all Hillson "Praga " aeroplanes Oil and Fuel Systems. modified in accordance with Minor Modification withi n three months from the date of this notice. C.S. No. 6 (April, 1936).—Oil Temperature Report, Serial No. LO.4 (issued by the Air Registra 4 . Sets of part s may be obtained, free of charge, Thermometers . tion Board), are not affected by the foregoing from the manufacturers, Messrs. F. Hills and Sons, C.S. No. 7 (April, 1936).—Radiator Temperature paragraphs . Ltd. , Trafford Park, Manchester, who will supply Thermometers . 5. There would appear to be a possibility of the full particulars for incorporating the modification. C.S. No . 8A (May, 1936).—Rate of Tur n Indicators. brak e cable catching in a similar manner if it is 5. Certificates of Airworthiness of the aeroplanes C.S. No. 9 (April, 1936).—Magnetic Compasses. badly adjusted. The adjustments should be made concerned will be liable t o suspension or cancellation C.S. No. 10 (April, 1936).—Fire Extinguishers. so tha t the brakes operate on the ground in con in the event of failure to comply with the above C.S. No. 11A (May, 1937).—Electrical Apparatus junction with the rudder bar, with the brake lever requirement s by the time stated in paragraph 3, (Other than Wireless Apparatus). on the third or fourth notch in the quadrant. an d after that time, ground engineers must not sign C.S. No. 12A (June, 1937) (as amended by October 7, 1938. Daily Certificates of Safety for Flight in respect of Amendmen t List No. 1, after incorporation such aeroplanes unless the modification has been of which 12A becomes 12n).—Safety Harness, No . 30 of the year 1938 satisfactorily carried out. Safety Belts and Lap Straps. October 13, 1938. CIVI L SPECIFICATION MEMORANDUM No. 17 C.S. No. 13 (April, 1936).—Fire-Resistance Tests. 1. This Memorandum cancels the following Civil C.S. No. 14 (Oct., 1936).—Directional Gyro. Specification Memoranda: C.S. No. 15 (May, 1937).—Electrical Generators. N o 33 of the year 1938 Civil Specification Memorandum No. 10. C.S. No. 16 (June, 1938).—Artificial Horizons. Civil Specification Memorandum No. 1$ (Notice to Aircraft Owners and Ground Engineers C.S. No. 17 (June, 1938).—Longitudinal Incline No. 3/1938.) 1. The 1937 issue of the above-mentioned Speci Indicators . Civil Specification Memorandum No. 12. fication is referred to in Design Leaflet A.9 of the C.S. No. 18 (June, 1938).—Oil Coolers. (Notice to Aircraft Owners and Ground Engineers Airworthiness Handbook for Civil Aircraft (Air 4. Correction to Civil Specification No. 15. No. 17/1938.) Publicatio n 1208) as being one in connection with "Electrica l Generators," paragraph 3 (ii), line 6: Civil Specification Memorandum No. 13. which Civil Specification procedure may be adopted. Amend "British Standard Specification 170- (Notice to Aircraft Owners and Ground Engineers 2. To permit of the continued supply for a 1930 " to read "British Standard Specification No. 21/1938.) limited period of instruments which comply with 170-1926." Civil Specification Memorandum No. 14. "Grad e II " requirements in the earlier (1929) 5. Cancellations.—Notices to Aircraft Owners and (Notice to Aircraft Owners and Ground Engineers issue of this Specification, it has been decided that Ground Engineers Nos. 3, 17, 21, 22 and 23/1938 No. 22/1938.) paragrap h 9 of Design Leaflet A.9 shall be deemed ar e hereby cancelled. Civil Specification Memorandum No. 15. to refer to both issues until 30th June, 1939, but October 8, 1938. (Notice to Aircraft Owners and Ground Engineers only to the 1937 issue after that date. No. 23/1938.) 3 . Firms authorised to certify compliance with No . 31 of the year 1938 2. After cancellation of the above Memoranda, Civil Specifications must acknowledge receipt of this the following is a complete list of current Civil Notice on the enclosed form. 1. The aviation brand names under which the Specification Memoranda: Anglo-American Oil Company, Ltd., and the Novembe r 9, 1938.
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: Jan 1, 1939