Appendix 1
• Other Recovery Techniques • Use of inertial reference speed emphasizes control of round speed Many windshear recovery techniques which is contrary to the recomwere evaluated while establishing the mended recovery technique.
technique recommended above. The addition, this technique is oritechniques below are NOT recommended ented toward compensating for the since they may reduce the chances for windshear and continuing the apsurviving a windshear encounter. proach rather than immediately initiating the recovery maneuver.
Attempting to maintain target air- While this technique is not approspeed does not utilize full climb priate for microburst encounters, capability of the airplane. it may De suitable for use in other types of windshears.
Attempting to pitch directly to stick shaker does not maximize use Use of "dive" technique (lowering of available airplane energy, and airplane nose in attempt to acceland increased exposure to stallpath results in a degraded flight erate then pull up at some predetermined minimum altitude) exposes the airplane to potentially higher
• Attempting to fly at best intensity duces lower minimum recovery apti- Lift/Drag angle-of-attack does not utilize the short-term maximum tudes, requires high pitch rates gradient capability of the air- and complicates the recovery proplane. cedure.
• Retracting flaps during approach Again, best recovery results are recovery (per the normal go-around achieved by properly controlling pitch procedure) reduces margins to attitude 'in conjunction with thrust stick shaker and has an adverse application.
impact on initial climb capability of the airplane.
Appendix 1
2.5 SUMMARY Behavior changes are also necessary.
These changes involve appropriate This document has presented the latest pilot technique should the windshear air transport industry findings on avoidance process fail.
with any learning, however, it windshear education and training. must As was discussed in this Pilot Windchanges in attitude and be- shear Guide, some of the techniques havior if it is to be effective. presented regarding pitch attitude and airspeed control differ from those Changes in attitude are necessary to ordinarily used. However, the recomheighten crew awareness of clues which mended techniques have been rigorously indicate the presence of windshear. studied and evaluated for their effec- In past windshear accidents, signifi- tiveness. Pilots must be prepared to cant clues apparently went unnoticed. apply these techniques and take deci- Recall again that the best defense sive action should the need arise.
against the low altitude windshear hazard is to avoid it altogether. It is recognized that the value of This is especially important since this training will be challenged giver shears exist that are beyond the capa- the infrequency of its required use.
bility of any pilot or airplane. Like many other piloting skills, wind- Since present weather information shear training will not be exercised infallibly detect windsnear the sig- sources and detection systems cannot flight will be required to maintain profici- daily and periodic recurrency training crews must be ever alert for ency. Through this process the knownals which will permit avoidance. ledge and skills pertaining to windshear recognition, avoidance, and recovery will be available and ready for use when required.
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