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Airport Operations

deteriorating braking conditions and should request

current runway condition information if not issued by

controllers. Pilots should also be prepared to provide

a descriptive runway condition report to controllers

after landing.

4−3−9. Runway Condition Reports

a. Aircraft braking coefficient is dependent upon

the surface friction between the tires on the aircraft

wheels and the pavement surface. Less friction means

less aircraft braking coefficient and less aircraft

braking response.

b. Runway condition code (RwyCC) values range

from 1 (poor) to 6 (dry). For frozen contaminants on

runway surfaces, a runway condition code reading of

4 indicates the level when braking deceleration or

directional control is between good and medium.


A RwyCC of “0” is used to delineate a braking action

report of NIL and is prohibited from being reported in a


c. Airport management should conduct runway

condition assessments on wet runways or runways

covered with compacted snow and/or ice.

1. Numerical readings may be obtained by using

the Runway Condition Assessment Matrix (RCAM).

The RCAM provides the airport operator with data to

complete the report that includes the following:

(a) Runway(s) in use

(b) Time of the assessment

(c) Runway condition codes for each zone

(touchdown, mid−point, roll−out)

(d) Pilot−reported braking action report (if


(e) The contaminant (for example, wet snow,

dry snow, slush, ice, etc.)

2. Assessments for each zone (see 4−3−9c1(c))

will be issued in the direction of takeoff and landing

on the runway, ranging from “1” to “6” to describe

contaminated surfaces.


A RwyCC of “0” is used to delineate a braking action

report of NIL and is prohibited from being reported in a


3. When any 1 or more runway condition codes

are reported as less than 6, airport management must

notify ATC for dissemination to pilots.

4. Controllers will not issue runway condition

codes when all 3 segments of a runway are reporting

values of 6.

d. When runway condition code reports are

provided by airport management, the ATC facility

providing approach control or local airport advisory

must provide the report to all pilots.

e. Pilots should use runway condition code

information with other knowledge including aircraft

performance characteristics, type, and weight,

previous experience, wind conditions, and aircraft

tire type (such as bias ply vs. radial constructed) to

determine runway suitability.

f. The Runway Condition Assessment Matrix

identifies the descriptive terms “good,” “good to

medium,” “medium,” “medium to poor,” “poor,” and

“nil” used in braking action reports.


Advisory Circular AC 91−79A (Revision 1), Mitigating the Risks of a

Runway Overrun Upon Landing, Appendix 1


7110.65R CHG 2