<< >> NASA ASRS Report 428530, February 1999

Crew used wrong altimeter setting and descended below assigned altitude.

Attributes
ACN	428530
Time
Date	199902
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : roc.vortac
State Reference	NY
Altitude	msl bound lower : 15600 msl bound upper : 16000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp
Experience	flight time last 90 days : 200 flight time total : 15000 flight time type : 3000
ASRS Report	428530
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 175 flight time total : 9000 flight time type : 5000
ASRS Report	428337
Events
Anomaly	altitude deviation : undershoot non adherence : clearance
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : returned to original clearance
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

ZOB issued descent clearance to 16000 ft. Altimeter was set to 30.66 with an actual setting of 29.66. At 15600 ft descent was stopped and climb to 16000 ft initiated.

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Original NASA ASRS Text

Title: CREW USED WRONG ALTIMETER SETTING AND DSNDED BELOW ASSIGNED ALT.

Narrative: ZOB ISSUED DSCNT CLRNC TO 16000 FT. ALTIMETER WAS SET TO 30.66 WITH AN ACTUAL SETTING OF 29.66. AT 15600 FT DSCNT WAS STOPPED AND CLB TO 16000 FT INITIATED.

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.