RNP

Question 1

How is RNP different from other Approaches

Answer 1

Instead of trapezoidal obstacle clearance
Use a line on either side of and parallel to published approach course - containment area
Containment area is 2x RNP value for the segment
.2 RNP = .4 NM EITHER SIDE OF AND PARALLEL TO SEGMENT CONTAINING .2 value

Question 2

What is a RNP curved flight path called?

Answer 2

Radius to Fix (RF) legs

Question 3

How are RL legs identified?

Answer 3

Profile view Jepp - LT Arc or RT Arc

FMC LEGS - ARC

Question 4

Are 757 VNAV System compensated or UNCOMPENSATED?

Answer 4

Uncompensated

Question 5

Is FDX 757 authorized to use VNAV above or below temp limits on RNP Charts?

Answer 5

No

We have uncompensated BARO-VNAV systems

Question 6

Where is ANP displayed?

Answer 6

PFD (CTR Map)
ND
FMC POS REF (page 2/4)

Question 7

Non-ILS flown in VNAV require . . . ?

5 things

Answer 7

1. Published GP angle on the legs page for the final approach segment.
2. RWxx waypoint coincident with the approach end of the runway
3. MAP waypoint before the approach end of the runway. (rare)
4. Two FMC
5. GPS

Question 8

What is “ON APPROACH” mode?

Answer 8

• speed window can be opened - VNAV remains in PTH

* MCP ALT can be set above the airplane’s current altitude as long as 300 ft above current altitude.

Question 9

How is “ON APPROACH” mode triggered by the crew?

Answer 9

1. VNAV in DES mode

2. Flaps out of “zero”.

Question 10

How does FMC TRANSITION out of “ON APPROACH”?

Answer 10

1. Lands
2. select GA
3. Fly beyond MAP point.

Question 11

What does the acronym LAVS represent?

What MCP settings are required and when

What other settings (2) are required when flying AR (RNP) approaches?

Answer 11

Lateral (LNAV or Loc)
Altitude (TDZE Rounded up, MAP by 1000’ AGL)
VNAV selected and VNAV SPD (aircraft is high) or VNAV PTH (no later than FAF)
Speed intervention selected (flaps out of zero) and set
RNP set by IAF and MAP at 10 nm scale

Question 12

When MUST you set MAP ALT on a RNAV approach?

Answer 12

• Stabilized on FINAL App Segment
• In VNAV PATH
• No later than 1000 AGL
• 300 ft below MAP ALT

Question 13

What is the VTK tolerance at the FAF.

Answer 13

+/- 75 ft

Question 14

When should the jet be configured for best VTK performance?

Answer 14

2 nm prior to FAF

Question 15

What configuration is required to show VTK error?

Answer 15

Gear down and Flaps 25/30
Or
GND PROX switch to OVRD and gear down

Question 16

What check must be made at the FAF?

Answer 16

Capt and FO altimeters within 100 ft

Otherwise a MAP executed

Question 17

On a RNP AR during RF leg segment, what must be done if GA is required?

Answer 17

Discontinued Appr

Question 18

Is a direct clearance to a RF leg okay?

Answer 18

No, prohibited

Question 19

When is a GA/MAP/Disc APPR required on a AR RNP APPR?

Answer 19

EICAS MSGS.
•ALT DISAGREE
• UNABLE RNP
• L or R GPS

VERIFY POSITION FMC
VTK in excess of +/- 75 ft from FAF inbound
XTK greater than published segment

Question 20

Do we have to go around with a VERIFY RNP scratchpad msg?

POS REF 2 of 3

Answer 20

No, this is normal for every RNP AR APPR.

Question 21

Where can we find missed approach climb gradient information for a CFIT high area?

Answer 21

QRH PERF/INIT
•2.48 PW
•3.47 RR

Question 22

What EICAS messages are RNP “game stoppers”?

Answer 22

10 messages 
ALT DISAGREE
FMC L or R FAIL 
GND PROX SYS
GPS/L/R
INSTR SWITCH
UNABLE RNP
VERIFY POSITION 
TERR POS

Question 23

Flying the APPR

Answer 23

Approaching FAF
• minimum RNP .13
• MAP scale 10nm
• verify VNAV PTH
• terrain display by PF no later than IAP
PASSING FAF
• monitor. VTK and XTK RNP scales (75 feet)
- requires • Gear down • flaps 25 or 30• GND PROX - OVRD
• monitor digital readouts
• verify altimeters are within 100 ft or Go Around

Question 24

5 most common VNAV MISTAKES

Answer 24

• Setting MCP PREMATURELY
• DELAYED MCP ALT CHANGE RESULTING IN VNAV ALT FMA
• Selecting ALT Intervention and deleting alt constraint next waypoint
• ensure speed window after selection of VNAV during LAVS
• Not ensuring RNP value is small font for all approaches other than RNP AR
• not being stabile at FAP Fix