Large transport flight crew forgot to reset altimeter at transition altitude of 18000 ft on climb. Thus, when leveling at cleared altitude of 24000 ft, ATC said they were showing 23300 ft. After correctly setting their altimeter they leveled at the right altitude.

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Attributes
ACN	330531
Time
Date	199603
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ewr
State Reference	NJ
Altitude	msl bound lower : 23300 msl bound upper : 24000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : instrument pilot : atp pilot : cfi pilot : commercial pilot : flight engineer
Experience	flight time total : 7300
ASRS Report	330531
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	flight crew : returned to assigned altitude other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On climb out from ewr, passing approximately 17500 ft we were cleared to 28000 ft, because of turbulence we asked for 24000 ft. We started back down at 27500 ft. Leveling at 24000 ft we noticed an altitude discrepancy at the same time ATC said they showed us at 23300 ft. (Captain) and first officer noticed they had not set altimeter to 29.92, which was corrected immediately. I feel the reason for this, was multiple altitude changes because of turbulence and ewr high altimeter setting 30.72 inches. Which all caused undue distraction at transition altitude change from local to high altitude.

Original NASA ASRS Text

Title: LGT FLC FORGOT TO RESET ALTIMETER AT TRANSITION ALT OF 18000 FT ON CLB. THUS, WHEN LEVELING AT CLRED ALT OF 24000 FT, ATC SAID THEY WERE SHOWING 23300 FT. AFTER CORRECTLY SETTING THEIR ALTIMETER THEY LEVELED AT THE RIGHT ALT.

Narrative: ON CLBOUT FROM EWR, PASSING APPROX 17500 FT WE WERE CLRED TO 28000 FT, BECAUSE OF TURB WE ASKED FOR 24000 FT. WE STARTED BACK DOWN AT 27500 FT. LEVELING AT 24000 FT WE NOTICED AN ALT DISCREPANCY AT THE SAME TIME ATC SAID THEY SHOWED US AT 23300 FT. (CAPT) AND FO NOTICED THEY HAD NOT SET ALTIMETER TO 29.92, WHICH WAS CORRECTED IMMEDIATELY. I FEEL THE REASON FOR THIS, WAS MULTIPLE ALT CHANGES BECAUSE OF TURB AND EWR HIGH ALTIMETER SETTING 30.72 INCHES. WHICH ALL CAUSED UNDUE DISTR AT TRANSITION ALT CHANGE FROM LCL TO HIGH ALT.

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.