|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||airport : tpa|
|Altitude||msl bound lower : 300|
msl bound upper : 2000
|Controlling Facilities||tower : tpa|
|Operator||general aviation : personal|
|Make Model Name||Small Aircraft, Low Wing, 1 Eng, Retractable Gear|
|Flight Phase||descent : approach|
|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
|Affiliation||government : faa|
|Function||controller : local|
|Qualification||controller : non radar|
|Anomaly||aircraft equipment problem : critical|
non adherence : clearance
non adherence : published procedure
other spatial deviation
|Independent Detector||other flight crewa|
|Resolutory Action||flight crew : regained aircraft control|
|Primary Problem||Flight Crew Human Performance|
|Air Traffic Incident||Pilot Deviation|
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.