Wrong altimeter setting causes TCASII RA.

Attributes
ACN	319366
Time
Date	199510
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : mco
State Reference	FL
Altitude	msl bound lower : 9000 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : mco
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 190 flight time total : 14000 flight time type : 320
ASRS Report	319366
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : overshoot conflict : airborne less severe non adherence : clearance non adherence : required legal separation other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Flight had an altitude deviation of 1000 ft climbing out of mco en route to srq. The reason for the deviation was due to the wrong barometric pressure setting on the captain's altimeter. The setting was 28.84 but should have been 29.84. The problem was discovered by TCASII warning 'stop climb.' the conflict traffic was missed by 300 ft vertical and about 2 mi horizontal. As a corrective measure I would suggest a xchk of altimeters on the before starting engine checklist.

Original NASA ASRS Text

Title: WRONG ALTIMETER SETTING CAUSES TCASII RA.

Narrative: FLT HAD AN ALT DEV OF 1000 FT CLBING OUT OF MCO ENRTE TO SRQ. THE REASON FOR THE DEV WAS DUE TO THE WRONG BAROMETRIC PRESSURE SETTING ON THE CAPT'S ALTIMETER. THE SETTING WAS 28.84 BUT SHOULD HAVE BEEN 29.84. THE PROB WAS DISCOVERED BY TCASII WARNING 'STOP CLB.' THE CONFLICT TFC WAS MISSED BY 300 FT VERT AND ABOUT 2 MI HORIZ. AS A CORRECTIVE MEASURE I WOULD SUGGEST A XCHK OF ALTIMETERS ON THE BEFORE STARTING ENG CHKLIST.

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.