Cessna 172R Pilot Operating Handbook page 294

SECTION 9 - SUPPLEMENTS
CESSNA
SUPPLEMENT 5 - FAA APPROVED
MODEL 172R
NOTE
Select HDG mode for DME arc intercepts.
NAV or APR
coupled DME arc
intercepts
can
result
in
excessive
overshoots (aggravated by high ground speeds and/or
intercepts from inside the arc).
A WARNING
FLYING FINAL OUTBOUND FROM AN OFF-
AIRPORT
VORTAC
ON
AN
OVERLAY
APPROACH; BEWARE OF THE DME DISTANCE
INCREASING ON FINAL APPROACH, AND THE
GPS DISTANCE-TO-WAYPOINT DECREASING,
AND NOT MATCHING THE NUMBERS ON THE
APPROACH PLATE.
5. At or before 2 nm from the FAF inbound:
Select the FAF as the active waypoint, if not accomplished already.
Select LEG operation.
6. Approaching the FAF inbound (within 2 nm):
Verify APR ACTV.
Note automatic CDI needle scaling change from + 1.0 nm to + 0.3
nm over the 2 nm inbound to the FAF.
Internally the KLN 89B will transition from terminal to approach
integrity monitoring.
7. Crossing the FAF and APR ACTV is not annunciated:
Do not descend.
Execute the missed approach.
8. Missed Approach:
Climb.
Navigate to the MAP (in APRARM if APR ACTV is not available).
NOTE
There is no automatic LEG sequencing at the MAP.
S5-14
Dec 2/96