Medium large transport crew had a reverser unlocked light illuminate in-flight.

Attributes
ACN	573871
Time
Date	200301
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : dtw.airport
State Reference	MI
Altitude	msl single value : 15000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : d21.tracon tower : pdk.tower
Operator	general aviation : corporate
Make Model Name	Medium Transport, Low Wing, 2 Turbojet Eng
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 7500 flight time type : 150
ASRS Report	573871
Person 2
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : reverser unlocked warning light other flight crewa other flight crewb
Resolutory Action	flight crew : diverted to another airport flight crew : declared emergency flight crew : landed in emergency condition other
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Climbing through 15000 ft, master caution illuminated with a right thrust reverser unlocked light reverser amber indication on engine indication, and unlock amber light on the emergency stow button. PF performed immediate action items as PNF confirmed which side and proceeded to perform the thrust unlock checklist in QRH. Secured aircraft as per checklist, decided to divert to most suitable airport, dtw. Declared an emergency and landed.

Original NASA ASRS Text

Title: MLG CREW HAD A REVERSER UNLOCKED LIGHT ILLUMINATE INFLT.

Narrative: CLBING THROUGH 15000 FT, MASTER CAUTION ILLUMINATED WITH A R THRUST REVERSER UNLOCKED LIGHT REVERSER AMBER INDICATION ON ENG INDICATION, AND UNLOCK AMBER LIGHT ON THE EMER STOW BUTTON. PF PERFORMED IMMEDIATE ACTION ITEMS AS PNF CONFIRMED WHICH SIDE AND PROCEEDED TO PERFORM THE THRUST UNLOCK CHKLIST IN QRH. SECURED ACFT AS PER CHKLIST, DECIDED TO DIVERT TO MOST SUITABLE ARPT, DTW. DECLARED AN EMER AND LANDED.

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.