A BE1900 flight crew levels off 100 ft above their assigned altitude and are turned immediately by ATC to avoid opposite direction, same altitude traffic, 90 NM northeast of las, nv.

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Attributes
ACN	474800
Time
Date	200005
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : las.vortac
State Reference	NV
Altitude	msl bound lower : 15000 msl bound upper : 16000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla.artcc tower : pdk.tower
Operator	common carrier : air carrier
Make Model Name	Beech 1900
Operating Under FAR Part	Part 135
Navigation In Use	other vortac
Flight Phase	cruise : level
Route In Use	enroute airway : ns.airway
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Experience	flight time last 90 days : 180 flight time total : 2800 flight time type : 350
ASRS Report	474800
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp
Experience	flight time last 90 days : 250 flight time total : 2200 flight time type : 4000
ASRS Report	474683
Events
Anomaly	altitude deviation : overshoot conflict : airborne critical non adherence : clearance non adherence : company policies other anomaly other other spatial deviation
Independent Detector	atc equipment : conflict alert other controllera
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	vertical : 0
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

ZLA cleared us up to 15000 ft. We mistakenly set 16000 ft and leveled off at 16000 ft. We were then advised of our mistake and instructed to deviate to avoid traffic. Mistake caused by human error. Supplemental information from acn 474683: when we leveled off at 16000 ft, we were instructed to make a 90 degree turn to avoid head-on traffic. I set 16000 ft in the altitude alerter by mistake. I believe this mistake was caused by fatigue by both crew members. This was the first flight of the day and we just had gotten off a 12 hour rest period. I was on my 6TH duty day. I believe I read back 15000 ft but inadvertently set 16000 ft. The copilot did not catch the error.

Original NASA ASRS Text

Title: A BE1900 FLC LEVELS OFF 100 FT ABOVE THEIR ASSIGNED ALT AND ARE TURNED IMMEDIATELY BY ATC TO AVOID OPPOSITE DIRECTION, SAME ALT TFC, 90 NM NE OF LAS, NV.

Narrative: ZLA CLRED US UP TO 15000 FT. WE MISTAKENLY SET 16000 FT AND LEVELED OFF AT 16000 FT. WE WERE THEN ADVISED OF OUR MISTAKE AND INSTRUCTED TO DEVIATE TO AVOID TFC. MISTAKE CAUSED BY HUMAN ERROR. SUPPLEMENTAL INFO FROM ACN 474683: WHEN WE LEVELED OFF AT 16000 FT, WE WERE INSTRUCTED TO MAKE A 90 DEG TURN TO AVOID HEAD-ON TFC. I SET 16000 FT IN THE ALT ALERTER BY MISTAKE. I BELIEVE THIS MISTAKE WAS CAUSED BY FATIGUE BY BOTH CREW MEMBERS. THIS WAS THE FIRST FLT OF THE DAY AND WE JUST HAD GOTTEN OFF A 12 HR REST PERIOD. I WAS ON MY 6TH DUTY DAY. I BELIEVE I READ BACK 15000 FT BUT INADVERTENTLY SET 16000 FT. THE COPLT DID NOT CATCH THE ERROR.

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.