An small aircraft pilot landed at las with no radio.

Attributes
ACN	256144
Time
Date	199310
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : las
State Reference	NV
Altitude	agl bound lower : 0 agl bound upper : 7800
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : las
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	cruise other other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : private
Experience	flight time last 90 days : 27 flight time total : 1243 flight time type : 1000
ASRS Report	256144
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : overcame equipment problem other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

In sum: a private small aircraft pilot landed at gcn with suspected alternator problem. As there was no maintenance at gcn, the pilot chose to continue to las, his original destination. The alternator problem worsened passing kingman as night was falling. The reporter pressed on to las as he was familiar with las but not kingman. The reporter reduced electrical loads as much as possible until reaching las. Overhead las, the reporter first squawked 7600, then 7700. Radio contact with las tower was intermittent, as was contact with other aircraft in the area. The reporter landed successfully with only partial flaps. Light signals were offered by the tower, but not seen by the reporter. A mechanic found that the main power post of the alternator was cracked casing radio noise and fluctuating charge discharge indications.

Original NASA ASRS Text

Title: AN SMA PLT LANDED AT LAS WITH NO RADIO.

Narrative: IN SUM: A PVT SMA PLT LANDED AT GCN WITH SUSPECTED ALTERNATOR PROB. AS THERE WAS NO MAINT AT GCN, THE PLT CHOSE TO CONTINUE TO LAS, HIS ORIGINAL DEST. THE ALTERNATOR PROB WORSENED PASSING KINGMAN AS NIGHT WAS FALLING. THE RPTR PRESSED ON TO LAS AS HE WAS FAMILIAR WITH LAS BUT NOT KINGMAN. THE RPTR REDUCED ELECTRICAL LOADS AS MUCH AS POSSIBLE UNTIL REACHING LAS. OVERHEAD LAS, THE RPTR FIRST SQUAWKED 7600, THEN 7700. RADIO CONTACT WITH LAS TWR WAS INTERMITTENT, AS WAS CONTACT WITH OTHER ACFT IN THE AREA. THE RPTR LANDED SUCCESSFULLY WITH ONLY PARTIAL FLAPS. LIGHT SIGNALS WERE OFFERED BY THE TWR, BUT NOT SEEN BY THE RPTR. A MECH FOUND THAT THE MAIN PWR POST OF THE ALTERNATOR WAS CRACKED CASING RADIO NOISE AND FLUCTUATING CHARGE DISCHARGE INDICATIONS.

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.