Pilot of C340 not used to drum type altimeter leveled off at wrong altitude.

Attributes
ACN	436945
Time
Date	199905
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : pwk.airport
State Reference	IL
Altitude	msl bound lower : 4000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : c90.tracon
Operator	general aviation : personal
Make Model Name	Cessna 340/340A
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Route In Use	departure : on vectors
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : cfi pilot : multi engine pilot : instrument
Experience	flight time last 90 days : 25 flight time total : 3150 flight time type : 25
ASRS Report	436945
Person 2
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Events
Anomaly	altitude deviation : undershoot non adherence : clearance non adherence : far other anomaly other
Independent Detector	atc equipment other atc equipment : ns other controllera
Resolutory Action	controller : issued advisory flight crew : became reoriented
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Departed pwk airport on IFR flight plan to grr. On initial climb out, ord departure cleared me to 3000 ft MSL, then further clearance to climb to 5000 ft MSL. Leveled off at 4000 ft MSL instead of 5000 ft MSL due to misreading altimeter (roll type drum) and when asked to verify altitude of 4000 ft MSL, climbed to 5000 ft MSL, controller did not advise of any ATC vertical conflict.

Original NASA ASRS Text

Title: PLT OF C340 NOT USED TO DRUM TYPE ALTIMETER LEVELED OFF AT WRONG ALT.

Narrative: DEPARTED PWK ARPT ON IFR FLT PLAN TO GRR. ON INITIAL CLBOUT, ORD DEP CLRED ME TO 3000 FT MSL, THEN FURTHER CLRNC TO CLB TO 5000 FT MSL. LEVELED OFF AT 4000 FT MSL INSTEAD OF 5000 FT MSL DUE TO MISREADING ALTIMETER (ROLL TYPE DRUM) AND WHEN ASKED TO VERIFY ALT OF 4000 FT MSL, CLBED TO 5000 FT MSL, CTLR DID NOT ADVISE OF ANY ATC VERT CONFLICT.

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.