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Air carrier flight crew reports landing with mu readings of 26; 24; 23 and finding the braking action to be nil. The tower had just opened and the readings were old.
| Attributes | |
| ACN | 1233009 |
| Time | |
| Date | 201501 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | Widebody Transport |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Landing |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Person 2 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Ground Event / Encounter Loss Of Aircraft Control |
Narrative:
Latest report: wind 290/9. Mu 26;24;23 runway sanded and treated. Braking action actually nil. Darn near slid off the side of the runway. There is too much ambiguity regarding mu values. The fom cautions that no reliable correlation exist between mu and braking action. Mu and braking action are now strongly correlated in my mind.
Original NASA ASRS Text
Title: Air carrier flight crew reports landing with Mu readings of 26; 24; 23 and finding the braking action to be nil. The Tower had just opened and the readings were old.
Narrative: Latest report: wind 290/9. Mu 26;24;23 runway sanded and treated. Braking action actually nil. Darn near slid off the side of the runway. There is too much ambiguity regarding mu values. The FOM cautions that no reliable correlation exist between mu and braking action. Mu and braking action are now strongly correlated in my mind.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.