MU2 has red light on indicating gear doors not closed. 3 green for gear itself are indicated.

Attributes
ACN	270931
Time
Date	199405
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cae
State Reference	SC
Altitude	agl bound lower : 0 agl bound upper : 1000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : cae
Operator	common carrier : air carrier
Make Model Name	MU-2
Operating Under FAR Part	Part 135
Flight Phase	descent : approach landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : single pilot
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 4300 flight time type : 35
ASRS Report	270931
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 213 flight time total : 9354 flight time type : 588
ASRS Report	271347
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	faa : assigned or threatened penalties
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

On a flight from atl to cae after takeoff, landing gear retracted normally, but outer gear doors (on mu-2), retracted slowly. During approach to landing in cae, gear extended normally (3 green), but red light did not extinguish, which on the MU2 indicates that the gear doors are not closed, but is still a safe condition for landing. Landing and taxi were normal. Upon postflt inspection, gear doors were found to not be retracted. Later inspection by maintenance revealed a failed gear door motor. Repair was made. Aircraft returned to service. FAA inspector who was present as we taxied up, seemed to think that this was a serious situation. I and my copilot disagree. According to the mu-2 manual, the gear is down and locked with 3 green, even if the red light is on which only indicates that the gear doors are open. Advice: FAA inspectors should be more knowledgeable about the aircraft they make judgements against, which in turn reflect on the flight crew. In my opinion, the flight crew made logical and sound decisions.

Original NASA ASRS Text

Title: MU2 HAS RED LIGHT ON INDICATING GEAR DOORS NOT CLOSED. 3 GREEN FOR GEAR ITSELF ARE INDICATED.

Narrative: ON A FLT FROM ATL TO CAE AFTER TKOF, LNDG GEAR RETRACTED NORMALLY, BUT OUTER GEAR DOORS (ON MU-2), RETRACTED SLOWLY. DURING APCH TO LNDG IN CAE, GEAR EXTENDED NORMALLY (3 GREEN), BUT RED LIGHT DID NOT EXTINGUISH, WHICH ON THE MU2 INDICATES THAT THE GEAR DOORS ARE NOT CLOSED, BUT IS STILL A SAFE CONDITION FOR LNDG. LNDG AND TAXI WERE NORMAL. UPON POSTFLT INSPECTION, GEAR DOORS WERE FOUND TO NOT BE RETRACTED. LATER INSPECTION BY MAINT REVEALED A FAILED GEAR DOOR MOTOR. REPAIR WAS MADE. ACFT RETURNED TO SVC. FAA INSPECTOR WHO WAS PRESENT AS WE TAXIED UP, SEEMED TO THINK THAT THIS WAS A SERIOUS SIT. I AND MY COPLT DISAGREE. ACCORDING TO THE MU-2 MANUAL, THE GEAR IS DOWN AND LOCKED WITH 3 GREEN, EVEN IF THE RED LIGHT IS ON WHICH ONLY INDICATES THAT THE GEAR DOORS ARE OPEN. ADVICE: FAA INSPECTORS SHOULD BE MORE KNOWLEDGEABLE ABOUT THE ACFT THEY MAKE JUDGEMENTS AGAINST, WHICH IN TURN REFLECT ON THE FLC. IN MY OPINION, THE FLC MADE LOGICAL AND SOUND DECISIONS.

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.