Air ambulance lands below minimums and has loss of aircraft control on runway.

Attributes
ACN	236869
Time
Date	199303
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : agc
State Reference	PA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	other
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent : approach landing other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 80 flight time total : 3800 flight time type : 750
ASRS Report	236869
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	non adherence : far non adherence : published procedure other anomaly
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted none taken : unable
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	Pilot Deviation

Narrative:

Was dispatched for a medical flight to sch and return with patient to agc. Contacted flight service and received a WX briefing. At the time of arrival back at agc, WX was forecast to be down to an occasional 200 ft overcast and 1/2 mi visibility in snow. WX at takeoff time of departure was 800 ft overcast and 2 mi in snow. I felt we could make the trip before it got this bad. Arrived at sch and WX was still 800 ft overcast and 2 at agc. Returned to agc and at 20 mi out, WX went below landing minimums, so I elected to divert to youngstown where we stayed for approximately 2 hours. Agc tower called us and stated that the visibility had gone up above landing minimums. So we took off and returned to agc. Once we passed the FAF tower visibility went below minimums again. I elected to continue the approach. I did the ILS to runway 27. Winds were out of the north at approximately 20 KTS. Runway was in sight about decision ht and a landing was made. On touchdown the aircraft began to slide sideways. Differential reverse was used, but no change. Aircraft did not leave the runway and no damage was done to the aircraft and no injuries to occupants. I feel this incident could have been prevented if the pressure to get the patient back to pittsburgh had not been there.

Original NASA ASRS Text

Title: AIR AMBULANCE LANDS BELOW MINIMUMS AND HAS LOSS OF ACFT CTL ON RWY.

Narrative: WAS DISPATCHED FOR A MEDICAL FLT TO SCH AND RETURN WITH PATIENT TO AGC. CONTACTED FLT SVC AND RECEIVED A WX BRIEFING. AT THE TIME OF ARR BACK AT AGC, WX WAS FORECAST TO BE DOWN TO AN OCCASIONAL 200 FT OVCST AND 1/2 MI VISIBILITY IN SNOW. WX AT TKOF TIME OF DEP WAS 800 FT OVCST AND 2 MI IN SNOW. I FELT WE COULD MAKE THE TRIP BEFORE IT GOT THIS BAD. ARRIVED AT SCH AND WX WAS STILL 800 FT OVCST AND 2 AT AGC. RETURNED TO AGC AND AT 20 MI OUT, WX WENT BELOW LNDG MINIMUMS, SO I ELECTED TO DIVERT TO YOUNGSTOWN WHERE WE STAYED FOR APPROX 2 HRS. AGC TWR CALLED US AND STATED THAT THE VISIBILITY HAD GONE UP ABOVE LNDG MINIMUMS. SO WE TOOK OFF AND RETURNED TO AGC. ONCE WE PASSED THE FAF TWR VISIBILITY WENT BELOW MINIMUMS AGAIN. I ELECTED TO CONTINUE THE APCH. I DID THE ILS TO RWY 27. WINDS WERE OUT OF THE N AT APPROX 20 KTS. RWY WAS IN SIGHT ABOUT DECISION HT AND A LNDG WAS MADE. ON TOUCHDOWN THE ACFT BEGAN TO SLIDE SIDEWAYS. DIFFERENTIAL REVERSE WAS USED, BUT NO CHANGE. ACFT DID NOT LEAVE THE RWY AND NO DAMAGE WAS DONE TO THE ACFT AND NO INJURIES TO OCCUPANTS. I FEEL THIS INCIDENT COULD HAVE BEEN PREVENTED IF THE PRESSURE TO GET THE PATIENT BACK TO PITTSBURGH HAD NOT BEEN THERE.

Data retrieved from NASA's ASRS site as of July 2007 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.