Perform a VPT approach (B737)[PDF]
- 1 Theoretical aspects
- 2 Preparatory work
- 3 Flying the VPT
- 4 Map of the flightpath
- 5 Case of aborted approach and go-around
- 6 See also
- 7 Reference
- 8 Author
Aircraft manual standard operating procedures
It will generally have the shape of a standard circling approach.
However, you may find radio-navigation means references such as DME distance to help you as well as computed length of segments.
Examples: VPT26 Basel LFSB & VPT20 A Ajaccio LFKJ
However, contrary to a circle-to-land, a VPT does not require the runway to be in sight, but the pilotshould only have ground surface in sight to begin the manoeuvre.
Example: VPT20 A Ajaccio LFKJ
RNAV visual approach requires a computed descent path to be provided to the pilots
However, since we need to manoeuvre the aircraft, we will not prepare our aircraft in the landing
For the Boeing B737, we will maintain:
- Vref+15, meaning about 160 IAS, and allowing a standard 25° bank angle.
- Final approach speed Vref when established on final.
- Entering again into the VPT procedure to attempt a new approach immediately. In this case the missed approach is visual.
- An instrument missed approach leading to a full new instrument procedure from an IAF.
- CAT C Minima: MDA - 1150’ (645’ AGL)
- Required visibility for CAT C: 2400m
- Missed Approach Point: 5.5NM STR DME
- Opening Turn: 45° Left
- Maximum IAS: 180 kts
For a better understanding, we are going to split the VPT in 4 segments:
- Leg 1) Opening leg: track 182° and 4.2NM
- Leg 2) Downwind leg: track 227° and 2.5MN
- Leg 3) Base turn
- Leg 4) Final
For each leg, we can highlight:
- Leg 1) we will remain off the right of a railroad and will try to reach the western side of Fegersheim.
- Leg 2) right before Fegersheim, we will turn downwind as to remain off the right of some villages.
- Leg 3) the base turn should be initiated upon crossing a road, before some lakes, and adjusted to fly abeam a village off our right
For each leg, we will determine the duration of the segment. Remember to start the timer accordingly!
- Leg 1) with GS=160kt, a/c flies 0.375 NM/min thus 4.2NM is flown in 1 min 35 seconds
- Leg 2) this segment is 2.5 NM long thus shall be flown in 56 seconds
For each leg, we can highlight:
- Leg 1) we should be around radial 090 at the end of the segment.
- Leg 2) we should be around radial 137 at the end of the segment.
- Leg 3) the base turn should be adjusted in order to overfly STR VOR at the end of the turn
- Leg 4) the final leads you to be established on radial 047 of STR VOR
Remember to check the descent slope they are set to.
Flying the VPT
End of ILS approach
- Aircraft is at Vref+15 (approx. 160kts)
- Aircraft is Flaps 15 and Gear is down.
- Minima are identified: 1150 feet in this case.
You consider the whole circling achievable in regard to visual flight. In that case you may enter into the opening leg. Check every circling steps (downwind, base and final).
- Entzheim on the right
- Geispolsheim on the left
On this picture we can see the village of Fegersheim and the railroad going through.
Various ways to make sure we are at the end of the downwind leg:
- we can see the two lakes we talked about.
- we can see we are about to overfly radial 137 of STR VOR.
- we are about to cross the small road before the base turn.
- Reduce speed to approach speed
Normally you should be a bit below the normal descent path. Do not be too slow to correct your attitude.
Use any means to confirm your descent:
- Visual guidance such as PAPI
- Instrumental references
Map of the flightpath
Case of aborted approach and go-around
- Boeing FCTM
- VID 200696 - Creation
DATE OF SUBMISSION
- 08:18, 4 August 2020
- This documentation is copyrighted as part of the intellectual property of the International Virtual Aviation Organisation.
- The content of this documentation is intended for aviation simulation only and must not be used for real aviation operations.