A B737-400 was dispatched in non compliance with the #1 localizer tuning deferred as inoperative but inadvertently rendered some VOR frequencys inoperative.

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Attributes
ACN	503907
Time
Date	200102
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	other personnel other
Experience	maintenance avionics : 29 maintenance repairman : 21
ASRS Report	503907
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure non adherence : far
Independent Detector	aircraft equipment other aircraft equipment : vor tuning other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : repair performance deficiency : fault isolation performance deficiency : non compliance with legal requirements performance deficiency : testing
Supplementary
Problem Areas	Maintenance Human Performance Company Chart Or Publication Aircraft
Primary Problem	Maintenance Human Performance
Situations
Publication	Minimum equipment list.

Narrative:

Pilot reported #1 navigation inoperative on localizer. MEL'ed #1 localizer feb/xa/01. During overnight layover at ZZZ, maintenance found open wire from control panel to first shelf disconnect. Human error failed to catch the fact that this open wire would also effect VOR operation. On mar/xa/01, pilot reported of captain's VOR does not seem to work on all frequencys, would not identify and hand flags. Copilot's worked fine. This pilot report led to the discovery of the open wire on the still inoperative #1 localizer. Aircraft went down for maintenance until wiring problem was repaired. VOR and localizer operation was normal after repair.

Original NASA ASRS Text

Title: A B737-400 WAS DISPATCHED IN NON COMPLIANCE WITH THE #1 LOC TUNING DEFERRED AS INOP BUT INADVERTENTLY RENDERED SOME VOR FREQS INOP.

Narrative: PLT RPTED #1 NAV INOP ON LOC. MEL'ED #1 LOC FEB/XA/01. DURING OVERNIGHT LAYOVER AT ZZZ, MAINT FOUND OPEN WIRE FROM CTL PANEL TO FIRST SHELF DISCONNECT. HUMAN ERROR FAILED TO CATCH THE FACT THAT THIS OPEN WIRE WOULD ALSO EFFECT VOR OP. ON MAR/XA/01, PLT RPTED OF CAPT'S VOR DOES NOT SEEM TO WORK ON ALL FREQS, WOULD NOT IDENT AND HAND FLAGS. COPLT'S WORKED FINE. THIS PLT RPT LED TO THE DISCOVERY OF THE OPEN WIRE ON THE STILL INOP #1 LOC. ACFT WENT DOWN FOR MAINT UNTIL WIRING PROB WAS REPAIRED. VOR AND LOC OP WAS NORMAL AFTER REPAIR.

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.