PA28 pilot experienced loss of throttle control on approach into tus.

Attributes
ACN	688240
Time
Date	200602
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zzz.tracon
State Reference	US
Altitude	msl single value : 5500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	general aviation : personal
Make Model Name	PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	arrival : vfr
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 4 flight time total : 165 flight time type : 30
ASRS Report	688240
Person 2
Function	observation : passenger
Qualification	pilot : multi engine pilot : instrument pilot : flight engineer pilot : cfi pilot : atp
Experience	flight time last 90 days : 200 flight time total : 16000 flight time type : 30
ASRS Report	688032
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : landed in emergency condition flight crew : overcame equipment problem
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

At time of descent; when ready to power back; found throttle control lever to be inoperative (unable to reduce cruise power setting). Contacted tower to relay problem. Tower responded to request needs if able. Requested 'emergency landing; l-hand circle down at end of runway 11. Need of tow from runway exit to transient parking.' landed and taxied off main runway; stopped and met emergency response and was towed to parking. Upon inspection found cotter pin failed and allowed clevis pin to extract from throttle lever/control cable connection. Cotter pin replaced with new; and inspected by local a&P mechanic. Corrective/preventive action could be; replace all quadrant cotter pins at all annual inspections. Far and ATC instructions were followed in the event.

Original NASA ASRS Text

Title: PA28 PLT EXPERIENCED LOSS OF THROTTLE CTL ON APCH INTO TUS.

Narrative: AT TIME OF DSCNT; WHEN READY TO PWR BACK; FOUND THROTTLE CTL LEVER TO BE INOP (UNABLE TO REDUCE CRUISE PWR SETTING). CONTACTED TWR TO RELAY PROB. TWR RESPONDED TO REQUEST NEEDS IF ABLE. REQUESTED 'EMER LNDG; L-HAND CIRCLE DOWN AT END OF RWY 11. NEED OF TOW FROM RWY EXIT TO TRANSIENT PARKING.' LANDED AND TAXIED OFF MAIN RWY; STOPPED AND MET EMER RESPONSE AND WAS TOWED TO PARKING. UPON INSPECTION FOUND COTTER PIN FAILED AND ALLOWED CLEVIS PIN TO EXTRACT FROM THROTTLE LEVER/CTL CABLE CONNECTION. COTTER PIN REPLACED WITH NEW; AND INSPECTED BY LCL A&P MECH. CORRECTIVE/PREVENTIVE ACTION COULD BE; REPLACE ALL QUADRANT COTTER PINS AT ALL ANNUAL INSPECTIONS. FAR AND ATC INSTRUCTIONS WERE FOLLOWED IN THE EVENT.

Data retrieved from NASA's ASRS site as of January 2009 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.