Summary of Key Points

A deceleration below the final approach speed should be accepted only in the following cases:
GPWS terrain avoidance maneuver;

Collision avoidance maneuver; and,

Windshear procedure.

Nevertheless, in all three cases, the throttles/thrust levers must be advanced to the maximum thrust (i.e., TOGA thrust) while initiating the maneuver.
Associated Flight Operations Briefing Notes

The following Flight Operations Briefing Notes should be reviewed along with the above information for a complete overview of the approach management:
Being Prepared for Go-around

Flying Stabilized Approaches

Flying Constant-angle Non-precision Approaches

Factors affecting the Final Approach Speed (V  APP)

Regulatory References

ICAO – Annex 6 – Operation of Aircraft, Part I – International Commercial Air Transport – Aeroplanes, Appendix 2, 5.18, 5.19.

ICAO – Procedures for Air navigation Services – Aircraft Operations (PANS-OPS, Doc 8168), Volume I – Flight Procedures.

Other References

U.S. National Transportation Safety Board (NTSB) – Report NTSB-AAS-76-5 –Special Study: Flight Crew Coordination Procedure in Air Carrier Instrument Landing System Approach Accidents.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
　
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