Aircraft equipment problem. Vacuum failure temporary loss of heading reference.

Attributes
ACN	320972
Time
Date	199511
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : pae
State Reference	WA
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zse tower : azo
Operator	general aviation : instructional
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude climbout : initial climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	Other
Function	instruction : instructor
Qualification	pilot : cfi
Experience	flight time last 90 days : 70 flight time total : 390 flight time type : 85
ASRS Report	320972
Person 2
Affiliation	Other
Function	instruction : trainee
Qualification	pilot : private
Events
Anomaly	aircraft equipment problem : critical other anomaly other other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Vacuum failure during takeoff in IMC. I did not recognize the problem quick enough and stabilize the plane. By the time the problem was sorted out we had approximately 90 degree heading change to the west (160-70 degrees). Then received vectors around for a straight in ILS approach. We broke out at 500 ft AGL.

Original NASA ASRS Text

Title: ACFT EQUIP PROB. VACUUM FAILURE TEMPORARY LOSS OF HDG REF.

Narrative: VACUUM FAILURE DURING TKOF IN IMC. I DID NOT RECOGNIZE THE PROB QUICK ENOUGH AND STABILIZE THE PLANE. BY THE TIME THE PROB WAS SORTED OUT WE HAD APPROX 90 DEG HDG CHANGE TO THE W (160-70 DEGS). THEN RECEIVED VECTORS AROUND FOR A STRAIGHT IN ILS APCH. WE BROKE OUT AT 500 FT AGL.

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.