Heading track deviation associated with a vacuum pump failure on an IFR departure procedure by a C182 training flight in a night operation off runway 32 at mob, al.

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Attributes
ACN	542363
Time
Date	200203
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : mob.airport
State Reference	AL
Altitude	agl bound lower : 500 agl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : mob.tower
Operator	general aviation : instructional
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Operating Under FAR Part	Part 91
Flight Phase	climbout : initial climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : private pilot : cfi pilot : commercial pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 300 flight time total : 1130 flight time type : 650
ASRS Report	542363
Person 2
Affiliation	other
Function	flight crew : single pilot instruction : trainee
Events
Anomaly	aircraft equipment problem : critical non adherence : clearance other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	aircraft : equipment problem dissipated flight crew : returned to intended or assigned course flight crew : returned to original clearance flight crew : became reoriented
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Environmental Factor Flight Crew Human Performance Aircraft
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Upon takeoff at mob we had a vacuum pump failure. We took off on runway 32 and were told to depart on a heading 320 degrees. After takeoff we turned 80 degrees (or so) to the right before we realized the directional gyroscope failed. We then used the wet compass to get back on our heading and the vacuum pump began working normally. Flight was resumed. There was no traffic in the area and tower said it was 'no problem' with them. The flight continued with no further problems.

Original NASA ASRS Text

Title: HEADING TRACK DEV ASSOCIATED WITH A VACUUM PUMP FAILURE ON AN IFR DEP PROC BY A C182 TRAINING FLT IN A NIGHT OP OFF RWY 32 AT MOB, AL.

Narrative: UPON TKOF AT MOB WE HAD A VACUUM PUMP FAILURE. WE TOOK OFF ON RWY 32 AND WERE TOLD TO DEPART ON A HEADING 320 DEGS. AFTER TKOF WE TURNED 80 DEGS (OR SO) TO THE R BEFORE WE REALIZED THE DIRECTIONAL GYROSCOPE FAILED. WE THEN USED THE WET COMPASS TO GET BACK ON OUR HEADING AND THE VACUUM PUMP BEGAN WORKING NORMALLY. FLT WAS RESUMED. THERE WAS NO TFC IN THE AREA AND TWR SAID IT WAS 'NO PROB' WITH THEM. THE FLT CONTINUED WITH NO FURTHER PROBS.

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.