Small aircraft pilot experiences loss of aircraft control on ILS approach to tpa.

Attributes
ACN	135152
Time
Date	199001
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : tpa
State Reference	FL
Altitude	msl bound lower : 300 msl bound upper : 2000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : tpa
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : private
Experience	flight time last 90 days : 50 flight time total : 1200 flight time type : 1160
ASRS Report	135152
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	aircraft equipment problem : critical non adherence : clearance non adherence : published procedure other anomaly other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

IFR flight from chanute, ks to st petersburg, fl. Uneventful until just after passing montgomery, al when apparent vacuum pump failure with loss of attitude indicator only (in VFR conditions) landed at dallas, al and couldn't get it fixed. The small aircraft is equipped with a backup vacuum pump (runs off of manifold pressure) backup only worked with lower power settings (low mp). Left dothan IFR for st petersburg with predicted WX of better than 1000' ceiling and 3 mi visibility. (Upon arriving found 500 and 1 conditions.) uneventful until on ILS runway 18 approach. At approximately 300' (still in cloud) I went left of course (full needle). Declared missed approach and pulled up. Then I lost control of aircraft totally and became totally disoriented. Sheer panic for a couple of mins. Aircraft would not seem to ascend. Bank indicator and attitude gyros disagreed? Aircraft shook (probably close to stall). I was saved only by popping up out of clouds at 2000'. Tower was angry and said I turned back onto final approach course. I was shaking and unable to concentrate. Put autoplt on and asked for a VFR place to land. Vectored to lakeland, fl for an uneventful landing. Lessons learned: I need more practice! I am current but mostly on VOR apches. Don't fly with inoperative equipment. Couldn't trust my attitude indicator on autoplt. Know your limitation. Thank god I'm alive!

Original NASA ASRS Text

Title: SMA PLT EXPERIENCES LOSS OF ACFT CONTROL ON ILS APCH TO TPA.

Narrative: IFR FLT FROM CHANUTE, KS TO ST PETERSBURG, FL. UNEVENTFUL UNTIL JUST AFTER PASSING MONTGOMERY, AL WHEN APPARENT VACUUM PUMP FAILURE WITH LOSS OF ATTITUDE INDICATOR ONLY (IN VFR CONDITIONS) LANDED AT DALLAS, AL AND COULDN'T GET IT FIXED. THE SMA IS EQUIPPED WITH A BACKUP VACUUM PUMP (RUNS OFF OF MANIFOLD PRESSURE) BACKUP ONLY WORKED WITH LOWER POWER SETTINGS (LOW MP). LEFT DOTHAN IFR FOR ST PETERSBURG WITH PREDICTED WX OF BETTER THAN 1000' CEILING AND 3 MI VISIBILITY. (UPON ARRIVING FOUND 500 AND 1 CONDITIONS.) UNEVENTFUL UNTIL ON ILS RWY 18 APCH. AT APPROX 300' (STILL IN CLOUD) I WENT LEFT OF COURSE (FULL NEEDLE). DECLARED MISSED APCH AND PULLED UP. THEN I LOST CONTROL OF ACFT TOTALLY AND BECAME TOTALLY DISORIENTED. SHEER PANIC FOR A COUPLE OF MINS. ACFT WOULD NOT SEEM TO ASCEND. BANK INDICATOR AND ATTITUDE GYROS DISAGREED? ACFT SHOOK (PROBABLY CLOSE TO STALL). I WAS SAVED ONLY BY POPPING UP OUT OF CLOUDS AT 2000'. TWR WAS ANGRY AND SAID I TURNED BACK ONTO FINAL APCH COURSE. I WAS SHAKING AND UNABLE TO CONCENTRATE. PUT AUTOPLT ON AND ASKED FOR A VFR PLACE TO LAND. VECTORED TO LAKELAND, FL FOR AN UNEVENTFUL LNDG. LESSONS LEARNED: I NEED MORE PRACTICE! I AM CURRENT BUT MOSTLY ON VOR APCHES. DON'T FLY WITH INOPERATIVE EQUIPMENT. COULDN'T TRUST MY ATTITUDE INDICATOR ON AUTOPLT. KNOW YOUR LIMITATION. THANK GOD I'M ALIVE!

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.