Narrative:

Gyroscopic instrument failure of vacuum operated instruments in IMC. Emergency declared by ATC. [We were] vectored for an approach. No damage to aircraft or ground facilities. ATC did a very good job of handling the situation.

Google
 

Original NASA ASRS Text

Title: A C172 vacuum system failed causing the loss of vacuum powered instruments. An emergency was declared and ATC vectored him for an approach.

Narrative: Gyroscopic instrument failure of vacuum operated instruments in IMC. Emergency declared by ATC. [We were] vectored for an approach. No damage to aircraft or ground facilities. ATC did a very good job of handling the situation.

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.