Commuter flight crew on training flight experience gear indication problem.

Attributes
ACN	178014
Time
Date	199105
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : con
State Reference	NH
Altitude	agl bound lower : 500 agl bound upper : 500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : mht
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent : approach other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain instruction : instructor oversight : pic
Qualification	pilot : commercial pilot : instrument pilot : cfi pilot : atp
Experience	flight time last 90 days : 250 flight time total : 10000
ASRS Report	178014
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer instruction : trainee
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

I had pulled gear indication circuit breaker to simulate unsafe gear indication. Circuit breaker would not reset. Aircraft has 4 ways of determining gear position. Because the circuit breaker would not reset, 2 of them were inoperative. I diverted to a maintenance base. After a flyby, we landed west/O further problems.

Original NASA ASRS Text

Title: COMMUTER FLT CREW ON TRAINING FLT EXPERIENCE GEAR INDICATION PROBLEM.

Narrative: I HAD PULLED GEAR INDICATION CB TO SIMULATE UNSAFE GEAR INDICATION. CB WOULD NOT RESET. ACFT HAS 4 WAYS OF DETERMINING GEAR POS. BECAUSE THE CB WOULD NOT RESET, 2 OF THEM WERE INOP. I DIVERTED TO A MAINT BASE. AFTER A FLYBY, WE LANDED W/O FURTHER PROBS.

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.