Medium large transport flight crew altitude deviation due to wrong altimeter setting.

Attributes
ACN	145857
Time
Date	199005
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : syr
State Reference	NY
Altitude	msl bound lower : 10700 msl bound upper : 11000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : syr
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : cfi pilot : atp pilot : instrument
Experience	flight time last 90 days : 180 flight time total : 6500 flight time type : 500
ASRS Report	145857
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : clearance non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared to 11000' descending through FL180, the preliminary landing checklist was accomplished and the current altimeter setting of 29.54' was noted and acknowledged. Upon handoff to approach control, I (the PNF) noticed on my altimeter that we were passing through 10700'. A quick glance at the PF's altimeter revealed an altitude of 11700' and an erroneous altimeter setting 30.54'. His altimeter was indicating 1000' higher than our actual altitude. A climb was initiated immediately to 11000'. Since the erroneous altimeter setting was on the captain's altimeter, and the altitude alerter received its information from this same INS. No altitude deviation alert was sounded. This situation could have been alleviated by calling out al 4 digits of the altimeter setting and x-chking to ensure that it had been properly.

Original NASA ASRS Text

Title: MLG FLT CREW ALT DEVIATION DUE TO WRONG ALTIMETER SETTING.

Narrative: CLRED TO 11000' DSNDING THROUGH FL180, THE PRELIMINARY LNDG CHKLIST WAS ACCOMPLISHED AND THE CURRENT ALTIMETER SETTING OF 29.54' WAS NOTED AND ACKNOWLEDGED. UPON HDOF TO APCH CTL, I (THE PNF) NOTICED ON MY ALTIMETER THAT WE WERE PASSING THROUGH 10700'. A QUICK GLANCE AT THE PF'S ALTIMETER REVEALED AN ALT OF 11700' AND AN ERRONEOUS ALTIMETER SETTING 30.54'. HIS ALTIMETER WAS INDICATING 1000' HIGHER THAN OUR ACTUAL ALT. A CLB WAS INITIATED IMMEDIATELY TO 11000'. SINCE THE ERRONEOUS ALTIMETER SETTING WAS ON THE CAPT'S ALTIMETER, AND THE ALT ALERTER RECEIVED ITS INFO FROM THIS SAME INS. NO ALT DEVIATION ALERT WAS SOUNDED. THIS SITUATION COULD HAVE BEEN ALLEVIATED BY CALLING OUT AL 4 DIGITS OF THE ALTIMETER SETTING AND X-CHKING TO ENSURE THAT IT HAD BEEN PROPERLY.

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.