Chart for iah runway 27 ILS is found to be confusing.

Attributes
ACN	465450
Time
Date	200003
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : iah.airport
State Reference	TX
Altitude	msl single value : 2300
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 27 other
Flight Phase	descent : vacating altitude
Route In Use	approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 290 flight time total : 22462 flight time type : 13100
ASRS Report	465450
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 6000 flight time type : 400
ASRS Report	465455
Events
Anomaly	altitude deviation : undershoot altitude deviation : crossing restriction not met non adherence : published procedure non adherence : clearance
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Chart Or Publication Flight Crew Human Performance
Primary Problem	Chart Or Publication
Air Traffic Incident	Pilot Deviation

Narrative:

ILS runway 27, houston's bush airport depicts a mandatory 2000 ft at 10 mi. This chart is misleading as it shows the 2000 ft, 10 mi on the GS. The chart date is feb/xa/00. We were 1 DOT low at 10 mi and the altitude readout was approximately 2300-2400 ft. The chart should be redrawn to depict the GS and the 2000 ft to intersect at some point inside the 10 mi point.

Original NASA ASRS Text

Title: CHART FOR IAH RWY 27 ILS IS FOUND TO BE CONFUSING.

Narrative: ILS RWY 27, HOUSTON'S BUSH ARPT DEPICTS A MANDATORY 2000 FT AT 10 MI. THIS CHART IS MISLEADING AS IT SHOWS THE 2000 FT, 10 MI ON THE GS. THE CHART DATE IS FEB/XA/00. WE WERE 1 DOT LOW AT 10 MI AND THE ALT READOUT WAS APPROX 2300-2400 FT. THE CHART SHOULD BE REDRAWN TO DEPICT THE GS AND THE 2000 FT TO INTERSECT AT SOME POINT INSIDE THE 10 MI POINT.

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.