A C150 rejected takeoff due to engine loss of power. Caused by loose nut on throttle arm and missing...

Attributes
ACN	655884
Time
Date	200504
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Cessna 150
Operating Under FAR Part	Part 91
Flight Phase	ground : maintenance ground : parked ground : takeoff roll
Person 1
Affiliation	other
Function	maintenance : technician other personnel
Qualification	technician : airframe technician : inspection authority technician : powerplant
ASRS Report	655884
Person 2
Affiliation	other
Function	instruction : instructor
Qualification	pilot : cfi technician : powerplant technician : airframe
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure
Independent Detector	other other : 2
Resolutory Action	flight crew : rejected takeoff
Consequence	other
Factors
Maintenance	performance deficiency : scheduled maintenance performance deficiency : non compliance with legal requirements performance deficiency : inspection performance deficiency : logbook entry performance deficiency : testing
Supplementary
Problem Areas	Maintenance Human Performance Chart Or Publication Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

Owner/operator; mr X; informed me that during a training flight with a student pilot taking off from ZZZ municipal airport; the takeoff was aborted because engine was not developing sufficient power. Aircraft was returned to the ramp for inspection. Mechanic found the nut holding the throttle arm loose and the cotter pin missing. The last annual inspection was completed apr/wed/05 by myself and mr X -- also an a&P mechanic. The engine controls were inspected at that time including function.

Original NASA ASRS Text

Title: A C150 REJECTED TKOF DUE TO ENG LOSS OF PWR. CAUSED BY LOOSE NUT ON THROTTLE ARM AND MISSING COTTER PIN.

Narrative: OWNER/OPERATOR; MR X; INFORMED ME THAT DURING A TRAINING FLT WITH A STUDENT PLT TAKING OFF FROM ZZZ MUNICIPAL ARPT; THE TKOF WAS ABORTED BECAUSE ENG WAS NOT DEVELOPING SUFFICIENT PWR. ACFT WAS RETURNED TO THE RAMP FOR INSPECTION. MECH FOUND THE NUT HOLDING THE THROTTLE ARM LOOSE AND THE COTTER PIN MISSING. THE LAST ANNUAL INSPECTION WAS COMPLETED APR/WED/05 BY MYSELF AND MR X -- ALSO AN A&P MECH. THE ENG CTLS WERE INSPECTED AT THAT TIME INCLUDING FUNCTION.

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.

A C150 rejected takeoff due to engine loss of power. Caused by loose nut on throttle arm and missing cotter pin.