Page:Report of the Board of Inquiry into the Helderberg air disaster.djvu/40

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(NO ANSWER)

A NTSB human performance expert commented as follows on the pilot's last VHF communication with the approach controller:

"The air traffic recording is generally of very good audio quality. After screening it, I had a definite impression that there were changes in the stress level of the speaker (who was identified to me as the captain) over the course of the tape. From 23:48:51 to 23:49:30 the speaker sounds relatively calm, speaking slowly and courteously (although the seriousness of his communication is clear from its content). At 23:49:30 he fails to complete the sentence, and there is a definite impression that someone or something in the cockpit ls distracting