A ramp agent reported that two separate aircraft experienced near misses with ground handling equipm...

Narrative:

Airport authority issued a field conditions report (ficon) for the apron indicating dry snow over packed snow braking action poor. Actual conditions were more than 2 inches dry snow over ice braking action nil. Two separate aircraft had near misses with ground handling equipment taxiing on to the apron. Both aircraft had completely locked brakes and were still advancing under idle power. Ramp personnel had to give emergency engine cut hand signals to stop the aircraft. One aircraft skidded approximately 40 feet before coming to a rest 6 to 8 feet from a passenger boarding ramp and the wing leading edge. The other aircraft began to yaw uncontrollably and came within 8-12 feet of a wing tip striking a truck.the airport had not conducted snow removal on the apron all day. The airport only issued an accurate ficon for the apron after both pilots gave pireps of nil.

Original NASA ASRS Text

Title: A Ramp Agent reported that two separate aircraft experienced near misses with ground handling equipment on the apron because of NIL braking. The airport authority had issued a Field Conditions (FICON) report for the apron indicating dry snow over packed snow with braking action poor.

Narrative: Airport authority issued a Field Conditions report (FICON) for the apron indicating dry snow over packed snow braking action poor. Actual conditions were more than 2 inches dry snow over ice braking action NIL. Two separate aircraft had near misses with ground handling equipment taxiing on to the apron. Both aircraft had completely locked brakes and were still advancing under idle power. Ramp personnel had to give emergency engine cut hand signals to stop the aircraft. One aircraft skidded approximately 40 feet before coming to a rest 6 to 8 feet from a passenger boarding ramp and the wing leading edge. The other aircraft began to yaw uncontrollably and came within 8-12 feet of a wing tip striking a truck.The airport had not conducted snow removal on the apron all day. The airport only issued an accurate FICON for the apron after both pilots gave PIREPs of NIL.

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.

Attributes
ACN	1422560
Time
Date	201602
Local Time Of Day	1801-2400
Place
Locale Reference	JAC.Airport
State Reference	WY
Environment
Light	Daylight
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Person 1
Function	Ramp
Events
Anomaly	Conflict Ground Conflict Critical Ground Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Weather / Turbulence
Miss Distance	Horizontal 8

A ramp agent reported that two separate aircraft experienced near misses with ground handling equipment on the apron because of nil braking. The airport authority had issued a field conditions (ficon) report for the apron indicating dry snow over packed snow with braking action poor.