B737 Landing Performance

B737 Performance chapter 3, Landing Performance. By the end of this chapter you can explain the difference between dispatch certified data and QRH advisory data, apply the approach and landing climb gradient checks, work through dry, wet and contaminated landing field length factors, set VREF and command speed correctly, read a brake cooling schedule, and use the TALPA runway condition code system.

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• 111 min of reading
• 12 question chapter check
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What this chapter covers

1. 1
   Dispatch certified data and QRH advisory dataWritten from 737-800 performance principles, TALPA/RCAM regulatory material, and QRH-PI concepts
   14 min read
2. 2
   Approach climb, landing climb, and VMCLWritten from 737-800 performance principles, TALPA/RCAM regulatory material, and QRH-PI concepts
   14 min read
3. 3
   Dry landing field length and the 1.67 factorWritten from 737-800 performance principles, TALPA/RCAM regulatory material, and QRH-PI concepts
   13 min read
4. 4
   Wet and contaminated landing field lengthWritten from 737-800 performance principles, TALPA/RCAM regulatory material, and QRH-PI concepts
   14 min read
5. 5
   VREF and command speedWritten from 737-800 performance principles, TALPA/RCAM regulatory material, and QRH-PI concepts
   15 min read
6. 6
   Brake cooling and thermal fuse plugsWritten from 737-800 performance principles, TALPA/RCAM regulatory material, and QRH-PI concepts
   13 min read
7. 7
   TALPA and the runway condition codeWritten from 737-800 performance principles, TALPA/RCAM regulatory material, and QRH-PI concepts
   15 min read
8. 8
   TALPA advisory distance and the 455 metre air distanceWritten from 737-800 performance principles, TALPA/RCAM regulatory material, and QRH-PI concepts
   13 min read

B737 landing performance terms

Performance dispatch

Certified pre-departure checks of landing climb and landing field length that give a limiting landing mass.

QRH-PI landing distance

Advisory in-flight landing distance for the runway condition expected at arrival.

CAT.OP.MPA.303

EASA rule: LDA must be at least 115 percent of the landing distance at the estimated time of arrival.

Approach climb gradient

2.1 percent with one engine inoperative, flaps 15 and gear up.

Landing climb gradient

3.2 percent with all engines, landing flap and gear down.

MACG (missed approach climb gradient)

PANS-OPS assumes 2.5 percent unless the chart publishes a steeper figure.

1.67 factor

Dry dispatch: the full stop distance must fit within 60 percent of the LDA, the same as distance times 1.67.

Wet runway factor

LDA must be at least 115 percent of the dry dispatch requirement.

VREF

Landing reference speed, at least 1.23 times the stall speed in landing configuration and never below VMCL.

Command speed wind additive

Half the steady headwind plus the full gust, between VREF plus 5 and VREF plus 15 knots.

Thermal fuse plugs

Wheel plugs that melt at roughly 177 to 199 degrees C to deflate a tyre after a hot brake stop.

Brake cooling schedule

QRH-PI table showing the cooling time or fuse plug melt risk after an RTO or landing.

RCAM (runway condition assessment matrix)

Turns observed runway contaminants into a runway condition code for each third of the runway.

RwyCC (runway condition code)

Scale from 6, dry, to 0, nil braking, with a matching braking action term.

TALPA

Takeoff and Landing Performance Assessment framework that introduced RCAM and the 455 m air distance.

Try a question from this chapter

B737 landing performance questions