A private pilot of a low wing single engine aircraft found himself in worsening WX conditions and had to be assisted in navigating to a successful landing.

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Attributes
ACN	432386
Time
Date	199903
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mmh.airport
State Reference	CA
Environment
Flight Conditions	Marginal
Weather Elements	Thunderstorm Rain Snow
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zoa.artcc tracon : fat.tracon
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	cruise : enroute altitude change
Route In Use	enroute : direct
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 20 flight time total : 250 flight time type : 20
ASRS Report	13
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	inflight encounter : weather other anomaly other other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	controller : provided flight assist flight crew : exited adverse environment
Consequence	Other
Supplementary
Problem Areas	Flight Crew Human Performance Weather
Primary Problem	Weather

Narrative:

I was en route to fresno from mamoth lakes VOR 023 degree radial when the ceiling dropped, causing me to navigation below radio contact and NAVAID contact to remain VFR. The ceiling continued to drop as I circled over a good place to land. I requested radio relay on 121.5 for assistance. I was assisted out of the area with vectors provided as control center and fat tower was able. Many controllers came to assist as well. The event was successful in assisting me to the fat airport without incident.

Original NASA ASRS Text

Title: A PVT PLT OF A LOW WING SINGLE ENG ACFT FOUND HIMSELF IN WORSENING WX CONDITIONS AND HAD TO BE ASSISTED IN NAVING TO A SUCCESSFUL LNDG.

Narrative: I WAS ENRTE TO FRESNO FROM MAMOTH LAKES VOR 023 DEG RADIAL WHEN THE CEILING DROPPED, CAUSING ME TO NAV BELOW RADIO CONTACT AND NAVAID CONTACT TO REMAIN VFR. THE CEILING CONTINUED TO DROP AS I CIRCLED OVER A GOOD PLACE TO LAND. I REQUESTED RADIO RELAY ON 121.5 FOR ASSISTANCE. I WAS ASSISTED OUT OF THE AREA WITH VECTORS PROVIDED AS CTL CTR AND FAT TWR WAS ABLE. MANY CTLRS CAME TO ASSIST AS WELL. THE EVENT WAS SUCCESSFUL IN ASSISTING ME TO THE FAT ARPT WITHOUT INCIDENT.

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.