Air carrier large transport flight crew leveled off at the wrong altitude due to inadvertently setting the wrong altimeter setting during the change over at FL180 during descent.

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Attributes
ACN	204499
Time
Date	199203
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : abe
State Reference	PA
Altitude	msl bound lower : 10400 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent other
Route In Use	enroute airway : zny
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp pilot : cfi pilot : commercial pilot : flight engineer
Experience	flight time last 90 days : 180 flight time total : 12000 flight time type : 2500
ASRS Report	204499
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : crossing restriction not met altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	flight crew : returned to intended course or assigned course other other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

ZNY gave us a clearance to descend to 11000 and issued us the altimeter setting of 29.36. The copilot read back 29.86 which was the altimeter setting the flight engineer had erroneously written down on the changeover information. Center did not correct the error during readback and we descended 600 ft below before center informed us that our mode C was indicating 10400 instead of 11000. We reset the correct altimeter setting and climbed back to 11000. A greater awareness of the transition altimeter setting by the entire flight crew would have prevented this situation.

Original NASA ASRS Text

Title: ACR LGT FLC LEVELED OFF AT THE WRONG ALT DUE TO INADVERTENTLY SETTING THE WRONG ALTIMETER SETTING DURING THE CHANGE OVER AT FL180 DURING DSCNT.

Narrative: ZNY GAVE US A CLRNC TO DSND TO 11000 AND ISSUED US THE ALTIMETER SETTING OF 29.36. THE COPLT READ BACK 29.86 WHICH WAS THE ALTIMETER SETTING THE FE HAD ERRONEOUSLY WRITTEN DOWN ON THE CHANGEOVER INFO. CTR DID NOT CORRECT THE ERROR DURING READBACK AND WE DSNDED 600 FT BELOW BEFORE CTR INFORMED US THAT OUR MODE C WAS INDICATING 10400 INSTEAD OF 11000. WE RESET THE CORRECT ALTIMETER SETTING AND CLBED BACK TO 11000. A GREATER AWARENESS OF THE TRANSITION ALTIMETER SETTING BY THE ENTIRE FLC WOULD HAVE PREVENTED THIS SITUATION.

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.