Small transport air taxi pilot lands aircraft without right gear showing safe indication.

Attributes
ACN	174896
Time
Date	199104
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mkk
State Reference	HI
Altitude	agl bound lower : 0 agl bound upper : 1200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : mkk
Operator	common carrier : air taxi
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	descent : approach landing other
Route In Use	approach : visual
Flight Plan	VFR
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : atp pilot : commercial
Experience	flight time last 90 days : 100 flight time total : 2700
ASRS Report	174896
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation other

Narrative:

During approach to mkk on a revenue flight at pm:00 local, 4/wed/91, I observed an unsafe gear indication for my right main landing gear on the small transport twin I was flying (no green light for that gear). I checked the bulb and it was ok. I then advised the tower of my difficulty and with their approval executed a fly-by so they could inspect the gear. They said it appeared to be down. Still not satisfied as to the gears being locked, I advised tower I would depart to the northwest and cycle the gear again, which I did, both electronically and then manually to the stops. Still no green lights for the right main gear. I called the tower and asked them to call my operations base to advise me where they desired that I land. I was instructed to land at mkk, which I did west/O incident. I did not declare an emergency, as there was no immediate danger. It turned out that a wire leading to the microswitch on the affected gear was broken.

Original NASA ASRS Text

Title: SMT AIR TAXI PLT LANDS ACFT WITHOUT RIGHT GEAR SHOWING SAFE INDICATION.

Narrative: DURING APCH TO MKK ON A REVENUE FLT AT PM:00 LCL, 4/WED/91, I OBSERVED AN UNSAFE GEAR INDICATION FOR MY RIGHT MAIN LNDG GEAR ON THE SMT TWIN I WAS FLYING (NO GREEN LIGHT FOR THAT GEAR). I CHKED THE BULB AND IT WAS OK. I THEN ADVISED THE TWR OF MY DIFFICULTY AND WITH THEIR APPROVAL EXECUTED A FLY-BY SO THEY COULD INSPECT THE GEAR. THEY SAID IT APPEARED TO BE DOWN. STILL NOT SATISFIED AS TO THE GEARS BEING LOCKED, I ADVISED TWR I WOULD DEPART TO THE NW AND CYCLE THE GEAR AGAIN, WHICH I DID, BOTH ELECTRONICALLY AND THEN MANUALLY TO THE STOPS. STILL NO GREEN LIGHTS FOR THE RIGHT MAIN GEAR. I CALLED THE TWR AND ASKED THEM TO CALL MY OPS BASE TO ADVISE ME WHERE THEY DESIRED THAT I LAND. I WAS INSTRUCTED TO LAND AT MKK, WHICH I DID W/O INCIDENT. I DID NOT DECLARE AN EMER, AS THERE WAS NO IMMEDIATE DANGER. IT TURNED OUT THAT A WIRE LEADING TO THE MICROSWITCH ON THE AFFECTED GEAR WAS BROKEN.

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.