Commuter pilot notes glide slope stability problem for ILS runway 06 at anc.

Attributes
ACN	181924
Time
Date	199106
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : anc
State Reference	AK
Altitude	agl bound lower : 500 agl bound upper : 500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : anc
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain instruction : instructor oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 215 flight time total : 13500 flight time type : 210
ASRS Report	181924
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer instruction : trainee
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Navigational Facility
Air Traffic Incident	other
Situations
Navigational Aid	Unspecified

Narrative:

The ILS approach to runway 6R had an excessive deflection below 500' AGL. This has gotten progressively worse during the past 6 months or so. Also it is affected by the low tide. It doesn't appear to be to the same level of signal quality as industry standard ILS is. G/south deviation is the specific problem.

Original NASA ASRS Text

Title: COMMUTER PLT NOTES GLIDE SLOPE STABILITY PROBLEM FOR ILS RWY 06 AT ANC.

Narrative: THE ILS APCH TO RWY 6R HAD AN EXCESSIVE DEFLECTION BELOW 500' AGL. THIS HAS GOTTEN PROGRESSIVELY WORSE DURING THE PAST 6 MONTHS OR SO. ALSO IT IS AFFECTED BY THE LOW TIDE. IT DOESN'T APPEAR TO BE TO THE SAME LEVEL OF SIGNAL QUALITY AS INDUSTRY STANDARD ILS IS. G/S DEV IS THE SPECIFIC PROB.

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.