<< >> NASA ASRS Report 528020, October 2001

A track deviation during approach to iah when the incorrect ILS frequency was tuned by one of the pilots and crosschk of the tuning was not done due to traffic watch.

Attributes
ACN	528020
Time
Date	200110
Day	Mon
Place
Locale Reference	airport : hou.airport
State Reference	TX
Altitude	msl single value : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-500
Flight Phase	descent : approach
Route In Use	approach : instrument non precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Experience	flight time last 90 days : 160 flight time total : 8000 flight time type : 3000
ASRS Report	528020
Events
Anomaly	non adherence : clearance other spatial deviation
Resolutory Action	controller : issued new clearance
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Flight path deviation (course). Inbound to iah we were given normal airspeed and altitude changes. While being sequenced for approach I tuned my navigation receiver for runway 26 ILS with GS OTS. Construction was at approach end of runway. Threshold was displaced 2000 ft. We were given 240 degree heading to intercept the runway 26 localizer and 4000 ft altitude at 12 NM out were told to switch to tower. When checked in, tower asked if we were on localizer. I checked my navigation and noticed flags then. Checked captain's navigation and noticed he had runway 27 localizer dialed up. Tower gave us 290 degree heading to rejoin. We had no TCAS warnings. Lesson learned, always double check both navigation receivers for correct frequency. WX was scattered clouds. Both of us were outside at same time looking for field. Not good timing.

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Original NASA ASRS Text

Title: A TRACK DEV DURING APCH TO IAH WHEN THE INCORRECT ILS FREQUENCY WAS TUNED BY ONE OF THE PLTS AND CROSSCHK OF THE TUNING WAS NOT DONE DUE TO TRAFFIC WATCH.

Narrative: FLT PATH DEV (COURSE). INBOUND TO IAH WE WERE GIVEN NORMAL AIRSPEED AND ALT CHANGES. WHILE BEING SEQUENCED FOR APCH I TUNED MY NAV RECEIVER FOR RWY 26 ILS WITH GS OTS. CONSTRUCTION WAS AT APCH END OF RWY. THRESHOLD WAS DISPLACED 2000 FT. WE WERE GIVEN 240 DEGREE HDG TO INTERCEPT THE RWY 26 LOC AND 4000 FT ALT AT 12 NM OUT WERE TOLD TO SWITCH TO TOWER. WHEN CHECKED IN, TOWER ASKED IF WE WERE ON LOC. I CHKED MY NAV AND NOTICED FLAGS THEN. CHKED CAPT'S NAV AND NOTICED HE HAD RWY 27 LOC DIALED UP. TOWER GAVE US 290 DEGREE HDG TO REJOIN. WE HAD NO TCAS WARNINGS. LESSON LEARNED, ALWAYS DOUBLE CHK BOTH NAV RECEIVERS FOR CORRECT FREQUENCY. WX WAS SCATTERED CLOUDS. BOTH OF US WERE OUTSIDE AT SAME TIME LOOKING FOR FIELD. NOT GOOD TIMING.

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.