mustafagander, I see where you may be coming from re the ARB.
Flight 3/5/60.
Finally, there was the matter of timing for the introduction of certain product improvements on which Boeing have for some time had an active programme. These were in the areas of ability to trim-out in certain conditions of asymmetrical power; pilot's rudder-bar feel; and the long-period divergency of dutch roll if left uncorrected and with automatic yaw damper off. The FAA has been closely integrated with this programme and are seeking introduction of this package of improvements as soon after approval as reasonably possible. Their experiences with the aircraft, and knowledge of it, undoubtedly justified this position and over 80 aircraft of the general type are in commercial use in passenger carriage. The ARB, however, judged these improvements to be so basic that they demanded their approval and introduction as a condition precedent to validation of the certificate.
These kinds of differences of opinion can be expected between any two groups of competent experts, and although in the certification of the 707-436 they have persisted to our cost and delay, it is not too much to hope that in the future the requirements may become asymptotic to the truth.
1960 | 0660 | Flight Archive