B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Type 1899
Situational Awareness
Ground Event / Encounter Other / Unknown; Inflight Event / Encounter Weather / Turbulence
General None Reported / Taken
Human Factors; Weather; Airport
Braking action reported 'medium 30.' Max landing weight; rain; 5 knot tail wind; Rwy 20; flaps 30. Received braking action report of medium inside of 1000 AFE; selected max brakes and had landing data [for] the reported conditions. On speed landing; touch down early in the touch down zone; braking action poor at best. Went max manual braking; asked FO to assist on braking 3/4 down runway. Stopped with approximately 150 feet remaining. Should have briefed flaps 40. If I would have landed 10 knots fast or long I am certain we would have not stopped. Reported braking action as 'poor' to tower.
B737 Captain reported difficulty stopping on the runway after finding braking action 'poor' rather than 'medium' as reported by Tower at MGGT.