MD80 crew did not comply with a mandatory altitude depicted on an ILS approach.

Attributes
ACN	469910
Time
Date	200004
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : iah.airport
State Reference	TX
Altitude	msl bound lower : 2000 msl bound upper : 2300
Environment
Light	Night
Aircraft 1
Controlling Facilities	tower : iah.tower
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 26
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : iah.tower
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : vacating altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	469910
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
ASRS Report	469911
Events
Anomaly	altitude deviation : undershoot conflict : airborne less severe non adherence : published procedure non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued alert none taken : detected after the fact
Supplementary
Problem Areas	FAA Flight Crew Human Performance Airspace Structure
Primary Problem	Airspace Structure
Air Traffic Incident	Pilot Deviation
Situations
ATC Facility	procedure or policy : iah.tower
Airspace Structure	class b : iah.b
Chart	approach : iah ils 26

Narrative:

Missed altitude restr. We were on downwind for runway 26 at iah. The first officer was flying. We were given a speed of 210 KTS and maintain 6000 ft. Then we were assigned 4000 ft. We were then turned on a right base leg and given instructions to maintain 4000 ft until intercepting the runway 26 localizer and cleared for the ILS runway 26 approach. Upon intercepting the localizer we were told to maintain 170 KTS. We intercepted the localizer at or about the grieg intersection. The aircraft was light, landing at 118000 pounds. We were slowing and had already selected 15 degrees of flaps, when the first officer noticed that we were high, and the first officer asked that the landing gear be extended to increase our rate of descent and still maintain 170 KTS. Inside the kerns intersection the tower told us that he was expecting us to be at the mandatory 2000 ft by now. He pointed out traffic ahead of us and climbing, which I had in sight and posed no conflict. Supplemental information from acn 469911: tower reported traffic ahead at 2300 ft and stated he was surprised we missed the 2000 ft crossing.

Original NASA ASRS Text

Title: MD80 CREW DID NOT COMPLY WITH A MANDATORY ALT DEPICTED ON AN ILS APCH.

Narrative: MISSED ALT RESTR. WE WERE ON DOWNWIND FOR RWY 26 AT IAH. THE FO WAS FLYING. WE WERE GIVEN A SPD OF 210 KTS AND MAINTAIN 6000 FT. THEN WE WERE ASSIGNED 4000 FT. WE WERE THEN TURNED ON A R BASE LEG AND GIVEN INSTRUCTIONS TO MAINTAIN 4000 FT UNTIL INTERCEPTING THE RWY 26 LOC AND CLRED FOR THE ILS RWY 26 APCH. UPON INTERCEPTING THE LOC WE WERE TOLD TO MAINTAIN 170 KTS. WE INTERCEPTED THE LOC AT OR ABOUT THE GRIEG INTXN. THE ACFT WAS LIGHT, LNDG AT 118000 LBS. WE WERE SLOWING AND HAD ALREADY SELECTED 15 DEGS OF FLAPS, WHEN THE FO NOTICED THAT WE WERE HIGH, AND THE FO ASKED THAT THE LNDG GEAR BE EXTENDED TO INCREASE OUR RATE OF DSCNT AND STILL MAINTAIN 170 KTS. INSIDE THE KERNS INTXN THE TWR TOLD US THAT HE WAS EXPECTING US TO BE AT THE MANDATORY 2000 FT BY NOW. HE POINTED OUT TFC AHEAD OF US AND CLBING, WHICH I HAD IN SIGHT AND POSED NO CONFLICT. SUPPLEMENTAL INFO FROM ACN 469911: TWR RPTED TFC AHEAD AT 2300 FT AND STATED HE WAS SURPRISED WE MISSED THE 2000 FT XING.

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.