Air carrier medium large transport experiences navigation radio tuning difficulties.

Attributes
ACN	143591
Time
Date	199004
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : msp
State Reference	MN
Altitude	msl bound lower : 2800 msl bound upper : 2800
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : msp tower : msp
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : atp pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 20000 flight time type : 250
ASRS Report	143591
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

#1 navigation radio would not tune to selected ILS frequency. Msp ILS frequency 110.3 was tuned to manual side. When manual was selected the navigation radio still indicated 110.3 but an incorrect identification was received (fairfield VOR I recall) and localizer and glide slope deviation dots did not appear on the east ADI. Frequency and automatic/manual were cycled numerous times. After at least 6 cycles of frequency retuning, proper identify and indications were received. This all occurred at a very busy and critical phase of flight. (Lowering landing gear, extending flaps, final checklist, changing to tower, etc).

Original NASA ASRS Text

Title: ACR MLG EXPERIENCES NAVIGATION RADIO TUNING DIFFICULTIES.

Narrative: #1 NAV RADIO WOULD NOT TUNE TO SELECTED ILS FREQ. MSP ILS FREQ 110.3 WAS TUNED TO MANUAL SIDE. WHEN MANUAL WAS SELECTED THE NAV RADIO STILL INDICATED 110.3 BUT AN INCORRECT IDENTIFICATION WAS RECEIVED (FAIRFIELD VOR I RECALL) AND LOC AND GLIDE SLOPE DEVIATION DOTS DID NOT APPEAR ON THE E ADI. FREQ AND AUTO/MANUAL WERE CYCLED NUMEROUS TIMES. AFTER AT LEAST 6 CYCLES OF FREQ RETUNING, PROPER IDENT AND INDICATIONS WERE RECEIVED. THIS ALL OCCURRED AT A VERY BUSY AND CRITICAL PHASE OF FLT. (LOWERING LNDG GEAR, EXTENDING FLAPS, FINAL CHECKLIST, CHANGING TO TWR, ETC).

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.