Altitude undershot when altimeter was not properly set.

Attributes
ACN	489440
Time
Date	200010
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : hto.vortac
State Reference	NY
Altitude	msl bound lower : 34800 msl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	artcc : zny.artcc tower : crw.tower
Operator	common carrier : air carrier
Make Model Name	B737-200
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	cruise : level
Route In Use	enroute airway : j174.airway
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 240 flight time total : 6000 flight time type : 500
ASRS Report	489440
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : undershoot non adherence : published procedure non adherence : far non adherence : clearance non adherence : company policies
Independent Detector	other controllerb
Resolutory Action	controller : issued advisory flight crew : returned to assigned altitude
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We forgot the climb checklist through FL180 and were not at 29.92 at cruise for about 10 mins. ATC informed us we were not exactly at FL350. We were about 200 ft low. There were no traffic conflicts at all.

Original NASA ASRS Text

Title: ALT UNDERSHOT WHEN ALTIMETER WAS NOT PROPERLY SET.

Narrative: WE FORGOT THE CLB CHKLIST THROUGH FL180 AND WERE NOT AT 29.92 AT CRUISE FOR ABOUT 10 MINS. ATC INFORMED US WE WERE NOT EXACTLY AT FL350. WE WERE ABOUT 200 FT LOW. THERE WERE NO TFC CONFLICTS AT ALL.

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.