|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||atc facility : ind|
|Altitude||msl bound lower : 8000|
msl bound upper : 8000
|Controlling Facilities||artcc : zid|
|Operator||general aviation : instructional|
|Make Model Name||Small Aircraft, Low Wing, 1 Eng, Retractable Gear|
|Flight Phase||cruise other|
|Function||flight crew : single pilot|
|Qualification||pilot : commercial|
pilot : instrument
|Experience||flight time last 90 days : 30|
flight time total : 350
flight time type : 35
|Function||controller : radar|
|Qualification||controller : radar|
|Anomaly||non adherence : clearance|
other anomaly other
other spatial deviation
|Independent Detector||other controllera|
other flight crewa
|Resolutory Action||flight crew : returned to intended course or assigned course|
|Primary Problem||Flight Crew Human Performance|
|Air Traffic Incident||Pilot Deviation|
Lost all VOR, DME, D/G, navigation while in IFR and ice. Cause: master switch only 1/2 on and alternator not on. Cause: my hand must have bumped the switch during turbulence during takeoff from okk. Discovered: ATC told me I was 12 mi off course and heading. Callback conversation with reporter revealed the following: reporter never did notice the alternator inoperative light and did finally notice VOR 'off' flags just about the same time that ARTCC called him about his position. When asked about whether or not the aircraft was equipped with an alternator inoperative light, reporter showed signs that he is not very familiar with the aircraft. He did finally remember that the light was located on the annunciator panel.
Original NASA ASRS Text
Title: SMA DRIFTS OFF COURSE WHEN POWER LOSS RESULTS IN ERRONEOUS VOR SIGNALS.
Narrative: LOST ALL VOR, DME, D/G, NAV WHILE IN IFR AND ICE. CAUSE: MASTER SWITCH ONLY 1/2 ON AND ALTERNATOR NOT ON. CAUSE: MY HAND MUST HAVE BUMPED THE SWITCH DURING TURB DURING TKOF FROM OKK. DISCOVERED: ATC TOLD ME I WAS 12 MI OFF COURSE AND HDG. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: RPTR NEVER DID NOTICE THE ALTERNATOR INOP LIGHT AND DID FINALLY NOTICE VOR 'OFF' FLAGS JUST ABOUT THE SAME TIME THAT ARTCC CALLED HIM ABOUT HIS POS. WHEN ASKED ABOUT WHETHER OR NOT THE ACFT WAS EQUIPPED WITH AN ALTERNATOR INOP LIGHT, RPTR SHOWED SIGNS THAT HE IS NOT VERY FAMILIAR WITH THE ACFT. HE DID FINALLY REMEMBER THAT THE LIGHT WAS LOCATED ON THE ANNUNCIATOR PANEL.
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.