MU30 crew had chronic GPS and FMC failure in clt class B.

Attributes
ACN	513759
Time
Date	200105
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : clt.airport
State Reference	NC
Altitude	msl single value : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : clt.tracon tracon : nuw.tracon
Operator	general aviation : corporate
Make Model Name	MU-300 Diamond 1/1A
Operating Under FAR Part	Part 91
Navigation In Use	other
Route In Use	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : multi engine
Experience	flight time last 90 days : 20 flight time total : 27000 flight time type : 650
ASRS Report	513759
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	maintenance problem : improper maintenance non adherence : company policies non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : anomaly accepted
Consequence	other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : fault isolation performance deficiency : repair performance deficiency : testing
Supplementary
Problem Areas	Maintenance Human Performance Aircraft Company
Primary Problem	Aircraft

Narrative:

Primary navigation system failed (GPS) FMS failed -- simultaneous equipment failure. Callback conversation with reporter revealed the following information: crew was flying a mitsubishi MU30 jet. There has been a long history of intermittent navigation problems with the aircraft. Maintenance can never find anything. In this case nothing was replaced because everything worked normal for maintenance.

Original NASA ASRS Text

Title: MU30 CREW HAD CHRONIC GPS AND FMC FAILURE IN CLT CLASS B.

Narrative: PRIMARY NAV SYS FAILED (GPS) FMS FAILED -- SIMULTANEOUS EQUIP FAILURE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: CREW WAS FLYING A MITSUBISHI MU30 JET. THERE HAS BEEN A LONG HISTORY OF INTERMITTENT NAV PROBS WITH THE ACFT. MAINT CAN NEVER FIND ANYTHING. IN THIS CASE NOTHING WAS REPLACED BECAUSE EVERYTHING WORKED NORMAL FOR MAINT.

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.