Aircraft equipment problem creates control problem for small aircraft pilot.

Attributes
ACN	251161
Time
Date	199308
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : tnt
State Reference	FL
Altitude	msl bound lower : 500 msl bound upper : 2200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	other
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	climbout : intermediate altitude cruise other other
Flight Plan	None
Person 1
Affiliation	government other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 60 flight time total : 2150 flight time type : 20
ASRS Report	251161
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

I was flying an small aircraft on a routine training mission in the area around dade-collier airport. I had previously accomplished 2 full stop lndgs at dade-collier prior to the emergency. On takeoff following the 2ND full stop landing, I climbed to 500 ft AGL and pushed forward on the yoke to decrease climb angle to accelerate. The yoke seemed to stick and took more force than normal to push over. At that point, the flight controls felt normal and I made a climbing left turn. I began to level off at 2200 ft and discovered that the yoke would not move fore or aft. I leveled off using power and trim. Trim appeared to work normally and I had aileron control to roll left and had rudder control. I turned left back towards dade-collier and entered a left downwind. I made gentle left turns and used power and trim to control glide path and descent. Landing was uneventful. On landing rollout, I regained aft yoke authority/authorized but no forward control. Maintenance inspection revealed that the wiring harness and VOR/ILS antennae splitter/coupler had dropped down and interfered with the yoke. Maintenance directives need to emphasize the importance of tying the wiring bundles behind the instrument panel and securing these bundles to a hard point to prevent any movement.

Original NASA ASRS Text

Title: ACFT EQUIP PROB CREATES CTL PROB FOR SMA PLT.

Narrative: I WAS FLYING AN SMA ON A ROUTINE TRAINING MISSION IN THE AREA AROUND DADE-COLLIER ARPT. I HAD PREVIOUSLY ACCOMPLISHED 2 FULL STOP LNDGS AT DADE-COLLIER PRIOR TO THE EMER. ON TKOF FOLLOWING THE 2ND FULL STOP LNDG, I CLBED TO 500 FT AGL AND PUSHED FORWARD ON THE YOKE TO DECREASE CLB ANGLE TO ACCELERATE. THE YOKE SEEMED TO STICK AND TOOK MORE FORCE THAN NORMAL TO PUSH OVER. AT THAT POINT, THE FLT CTLS FELT NORMAL AND I MADE A CLBING L TURN. I BEGAN TO LEVEL OFF AT 2200 FT AND DISCOVERED THAT THE YOKE WOULD NOT MOVE FORE OR AFT. I LEVELED OFF USING PWR AND TRIM. TRIM APPEARED TO WORK NORMALLY AND I HAD AILERON CTL TO ROLL L AND HAD RUDDER CTL. I TURNED L BACK TOWARDS DADE-COLLIER AND ENTERED A L DOWNWIND. I MADE GENTLE L TURNS AND USED PWR AND TRIM TO CTL GLIDE PATH AND DSCNT. LNDG WAS UNEVENTFUL. ON LNDG ROLLOUT, I REGAINED AFT YOKE AUTH BUT NO FORWARD CTL. MAINT INSPECTION REVEALED THAT THE WIRING HARNESS AND VOR/ILS ANTENNAE SPLITTER/COUPLER HAD DROPPED DOWN AND INTERFERED WITH THE YOKE. MAINT DIRECTIVES NEED TO EMPHASIZE THE IMPORTANCE OF TYING THE WIRING BUNDLES BEHIND THE INST PANEL AND SECURING THESE BUNDLES TO A HARD POINT TO PREVENT ANY MOVEMENT.

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.