Precautionary landing.

Attributes
ACN	117718
Time
Date	198907
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 800
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Helicopter
Flight Phase	cruise other descent : approach landing other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	other other : other pilot : commercial pilot : instrument
Experience	flight time last 90 days : 32 flight time total : 7200 flight time type : 32
ASRS Report	117718
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During a routine flight, malfunction of the main rotor RPM indicator was evident. A precautionary landing was made to check the system. Being an a&P mechanic and approved under my company's aaip maintenance program, I disconnected an electrical coupling, cleaned it, checked the system's operation, which was satisfactory, and then departed the site to continue the flight back to our base. Our landing site was dark, unpopulated, remote and the WX was not cooperating.

Original NASA ASRS Text

Title: PRECAUTIONARY LNDG.

Narrative: DURING A ROUTINE FLT, MALFUNCTION OF THE MAIN ROTOR RPM INDICATOR WAS EVIDENT. A PRECAUTIONARY LNDG WAS MADE TO CHK THE SYS. BEING AN A&P MECH AND APPROVED UNDER MY COMPANY'S AAIP MAINT PROGRAM, I DISCONNECTED AN ELECTRICAL COUPLING, CLEANED IT, CHKED THE SYS'S OPERATION, WHICH WAS SATISFACTORY, AND THEN DEPARTED THE SITE TO CONTINUE THE FLT BACK TO OUR BASE. OUR LNDG SITE WAS DARK, UNPOPULATED, REMOTE AND THE WX WAS NOT COOPERATING.

Data retrieved from NASA's ASRS site as of August 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.