An air carrier pilot reported that the runway 23L VASI is not accurate; stating that it differs from...

Attributes
ACN	905381
Time
Date	201008
Local Time Of Day	0001-0600
Place
Locale Reference	YIP.Airport
State Reference	MI
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 110 Flight Crew Total 5470 Flight Crew Type 1110
Events
Anomaly	ATC Issue All Types

Narrative:

The VASI at detroit willow run airport (yip) is not accurate and needs to be checked by the FAA flight check. I have reported this to the tower controller and yet it has not been deactivated; NOTAM'ed; or corrected. The VASI brings you in too low as well as the lights not working correctly. The far lights appear correctly. However the near lights will often show a red light on the left light and white light on the right. It is a little frustrating that this cannot get fixed. On a previous flight I was landing in IFR conditions after flying the ILS to 23L. Upon breaking out the VASI indicated that I was very high while the ILS said I was on the glidepath. I requested the tower turn the VASI off and they indicated that they were unable to as they are directly wired to the approach lighting system.

Original NASA ASRS Text

Title: An air carrier pilot reported that the Runway 23L VASI is not accurate; stating that it differs from the ILS glideslope but is not being addressed by the FAA.

Narrative: The VASI at Detroit Willow Run airport (YIP) is not accurate and needs to be checked by the FAA Flight Check. I have reported this to the Tower Controller and yet it has not been deactivated; NOTAM'ed; or corrected. The VASI brings you in too low as well as the lights not working correctly. The far lights appear correctly. However the near lights will often show a red light on the left light and white light on the right. It is a little frustrating that this cannot get fixed. On a previous flight I was landing in IFR conditions after flying the ILS to 23L. Upon breaking out the VASI indicated that I was very high while the ILS said I was on the glidepath. I requested the Tower turn the VASI off and they indicated that they were unable to as they are directly wired to the approach lighting system.

Data retrieved from NASA's ASRS site as of April 2012 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.

An air carrier pilot reported that the runway 23L VASI is not accurate; stating that it differs from the ILS glideslope but is not being addressed by the FAA.