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especially when taking off on Runway 13. Be sure to turn to the right instead of proceeding straight ahead in order that you will go over the World's Fair ground area.

5-11-43 - F. Smith

The following received from the CAA deserves the attention of all pilots. "Safety Regulation Release No. 280 - Subject: Observance of Placard Limitations. The purpose of this Release is to emphasize to Pilots, Aircraft Operators and Ground Crews the need for close observance of operating restrictions and limitations indicated by placards and instrument markings in aircraft. It has come to our attention that some accidents and equipment failures possibly have been caused by failure to observe certain of these operating limitations. Because placards are usually not accepted with too much favor, every effort is made to develop equipment which requires the least possible number of operating restrictions. Hence, the markings and placards included in a (?) aircraft are only those that have been found to be necessary in order to indicate the limitations and conditions within which the particular aircraft can be expected to operate safely. It is considered absolutely essential that all aircraft be operated only within acceptable limitations both in the air and on the ground in order that no accidents or failures will result from known unsafe operating conditions. There is one type placard or instrument marking whose significance we particularly desire to explain at this time. We refer specifically to rpm restrictions other than those indicated on the tachometer for maximum continuous maximum take-off rpm. Such restrictions are exemplified because it is sometimes difficult for operating personnel to understand the significance of rpm restrictions in a range, or in ranges, well within the maximum permissible limits. Further, inadvertent or deliberate operation in such restricted ranges usually does not evidence itself by any notable or peculiar condition of operation. These restrictions result from a prior determination that excessive vibration stresses have been found to exist in the propeller of engine crankshaft when rotation at the speeds at which operation has been restricted. A part vibrating with excessive stress will fail as soon as the part has been subjected to the number of stress reversals required to reach the fatigue limit of the material of which the part is made. It makes no difference whether the part is subjected to prolonged or to occasional operation under high vibration stress conditions, failure will occur when the next part has accumulated the number of stress reversals required to fatigue the part. A steel crankshaft rotating with excessive stress at 2000 rpm and seven vibration stress reversals per revolution cannot be possibly expected to survive more than a total of twelve hours of such operation. Accelerating and decelerating through restricted rpm ranges caused no serious harm from a vibration stress standpoint."

5-17-48 - F. Smith

Effective immediately all pilots will be required to demonstrate their proficiency in CW code at a speed of not less than 10 wpm send and receive. Tests will be given at the time of each regular six month instrument check. Arrangements are being made to have a radio operator conducts these tests.

5-19-48 F. Smith

Recently we had a case where a flight which would ordinarily have proceeded from Bermuda to New York was routed via Washington. In this particular instance the stewardesses were not aware of this change in flight plan and informed all passengers