Standard Operating Procedures
L410 UVP-E20
Document No.:
SOP-L410-1
Page 7- 18
Rev: 1
Date: JAN 18
Prepared by: LA
Checked by : CLS
7.18.1 Non-Precision Instrument Approaches General
Over the past several decades there have been a number of CFIT andunstabilised approach
incidents and accidents associated with non-ILSapproaches and landings.
Many of these could have been prevented by the use of constant angleapproach methods.
Traditional methods of flying Non-Precision approaches involvesetting a vertical speed on final
approach, leveling off at step-down altitudes
(if applicable) and at MDA(H), followed by a transition to a visual finalapproach segment and
landing.
These traditional methods involve changing the flight path at low altitudes andare not similar to
methods for flying ILS approaches. Further, these traditionalmethods often require of the crew a
higher level of skill, judgment and trainingthan the typical ILS approach.
The following sections describe methods for flying constant angle nonprecision approaches
(CANPA). These methods provide a constant angleapproach, which reduces exposure to crew
error and CFIT accidents. Thesemethods also make it much easier for the crew to achieve a
stabilizedapproach to a landing once suitable visual reference to the runwayenvironment has
been established.
A typical Instrument Approach using V/S assumes all preparations for theapproach; such as
review of the approach procedure and setting of minimaand radio tuning have been
completed.
The procedures illustrated focus generally on crew actions and avionicssystems information. The
flight pattern may be modified to suit local trafficand air traffic requirements. The following
discussions assume a straight-ininstrument approach is being flown.
7.18.2 Approach Preparations for CANPA
In addition to normal approach preparation, crew shall conduct the following:
•
Compute the expected groundspeed
•
Confirm the published vertical speed or computed vertical speed for the
final descent
NOTE
If the descent profile is approximately 3 degrees, take your ground speed X 5to calculate your
required rate of descent.
Eg. GS 100 knots = 500 fpm required ROD.
Summary of Contents for L410 UVP-E20
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