Page:CAB Accident Report, Pennsylvania Central Airlines Flight 19.pdf/102

 - Pittsburgh ground station to Trip 19: "Trip 19 cleared Frostburg to Pittsburgh tower circle field at 2500 feet before landing and look for light and will broadcast it on range. AW23PYW broadcast it. Also change to night frequency and give me a call." Not acknowledged.

- Pittsburgh ground station to Trip 19: "Trip 19 switch over on battery also change transmitter and try western day frequency and night frequency." Not acknowledged. Pittsburgh to Detroit: "Stand by on western day and night frequency." Pittsburgh repeated the above instructions to Trip 19. Not acknowledged.

- Pittsburgh to Trip 19: "Trip 19 change over to batteries and try changing your transmitter to western day and night frequencies." Not acknowledged.

- Pittsburgh to Trip 19: "Trip 19 Pittsburgh weather 3:35 p.m. estimated high broken lower broken visibility 4 miles smoke SE 10 ALTM 3000 scattered 2500". Not acknowledged. The above message was repeated to Trip 19. Not acknowledged.

- Pittsburgh to all ground stations: "Suspend traffic and operations for time being."

- Pittsburgh to Airways Radio Range Stations: "Airways broadcast clearance on BLV." Reply: "OK will do."

- Washington to Trip 19: Repeated 3:35 weather sequence. Not acknowledged.

- Pittsburgh broadcast complete weather sequence to Trip 19. Not acknowledged.