An air ambulance small transport landed en route.

Attributes
ACN	256153
Time
Date	199311
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	msl bound lower : 3800 msl bound upper : 3800
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : zzz tower : lax
Operator	common carrier : air carrier
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	cruise other other
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 160 flight time total : 4600 flight time type : 600
ASRS Report	256153
Person 2
Affiliation	company : air taxi
Function	flight attendant : on duty
Qualification	other other : other
Events
Anomaly	aircraft equipment problem : critical inflight encounter : weather
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	faa : reviewed incident with flight crew other
Supplementary
Primary Problem	Aircraft

Narrative:

At approximately XA30 local aircraft departed T65 on a 135 air ambulance mission. After making a normal departure, we contacted approach. At that time, I gave him my position and altitude and requested my IFR clearance to abc. After about 10 mins into the flight, we experienced a large noise, boom! At that time, all my engine gauges seemed to be normal. Our conditions were night time and IMC. After talking to my medical team and letting them know we had a problem, as well as the air traffic controller. I advised them we needed to divert to XXX. Shortly after that time, approximately 4 mins, my oil pressure dropped. As the engine started to run rough, I feathered the right engine. After completing the emergency checklist. Approach handed me off to tower. At that time, I asked him to make a phone call for me and to have crash fire rescue standing by. After safely landing and taxi back to FBO, I was able to talk to the crash fire rescue people and explain what happened. At no time was an emergency declared. The reason for the report is that I did later my course and then contacted approach, as well as going into single engine.

Original NASA ASRS Text

Title: AN AIR AMBULANCE SMT LANDED ENRTE.

Narrative: AT APPROX XA30 LCL ACFT DEPARTED T65 ON A 135 AIR AMBULANCE MISSION. AFTER MAKING A NORMAL DEP, WE CONTACTED APCH. AT THAT TIME, I GAVE HIM MY POS AND ALT AND REQUESTED MY IFR CLRNC TO ABC. AFTER ABOUT 10 MINS INTO THE FLT, WE EXPERIENCED A LARGE NOISE, BOOM! AT THAT TIME, ALL MY ENG GAUGES SEEMED TO BE NORMAL. OUR CONDITIONS WERE NIGHT TIME AND IMC. AFTER TALKING TO MY MEDICAL TEAM AND LETTING THEM KNOW WE HAD A PROB, AS WELL AS THE AIR TFC CTLR. I ADVISED THEM WE NEEDED TO DIVERT TO XXX. SHORTLY AFTER THAT TIME, APPROX 4 MINS, MY OIL PRESSURE DROPPED. AS THE ENG STARTED TO RUN ROUGH, I FEATHERED THE R ENG. AFTER COMPLETING THE EMER CHKLIST. APCH HANDED ME OFF TO TWR. AT THAT TIME, I ASKED HIM TO MAKE A PHONE CALL FOR ME AND TO HAVE CRASH FIRE RESCUE STANDING BY. AFTER SAFELY LNDG AND TAXI BACK TO FBO, I WAS ABLE TO TALK TO THE CRASH FIRE RESCUE PEOPLE AND EXPLAIN WHAT HAPPENED. AT NO TIME WAS AN EMER DECLARED. THE REASON FOR THE RPT IS THAT I DID LATER MY COURSE AND THEN CONTACTED APCH, AS WELL AS GOING INTO SINGLE ENG.

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.