FAR 23.75 landing distance- descent angle greater than 5.2%
FAR 23.75 excerpt:
(a) A steady approach at not less
than VREF, determined in accordance
with § 23.73 (a), (b), or (c), as appropriate,
must be maintained down to the
50 foot height and—
(1) The steady approach must be at a
gradient of descent not greater than 5.2
percent (3 degrees) down to the 50-foot
height.
(2) In addition, an applicant may
demonstrate by tests that a maximum
steady approach gradient steeper than
5.2 percent, down to the 50-foot height,
is safe. The gradient must be established
as an operating limitation and
the information necessary to display
the gradient must be available to the
pilot by an appropriate instrument.
My first question is regarding the required 'appropriate instrument/ indicator" that is mandated for any approach angle in excess of 3 degrees?. An approach angle indicator is not a typical instrument found in a GA aircraft, especially a small one such as would be used for operations where a steep approach profile and short landing distance may be required.
I am also a little confused as to intent of this paragraph, as the fact that whilst when making an ILS and utilizing the GS indicator a pilot has an indicator that shows a 3 degree (5.2 % ) approach, but if he is not so equipped at an airport without a serviceable ILS there is no indicator for the 3 degree profile, so why is one needed for approach angles in excess of this gradient?
If a light SE aircraft is intended for use in 'bush' environment, the shortest landing distance possible should be available as a procedure for the pilot (within the constraints of AC 23-8C). this would normally entail a steeper than 3 degree approach, though without excessive ROD, This aircraft would likely NOT have an approach gradient indicator for either the standard gradient or for angles greater than this.
HD