<< >> NASA ASRS Report 521874, August 2001

C172 instructor and trainee were attempting a go around with full flaps. The instructor's seat track lock became disengaged and the instructor was unable to control the aircraft.

Attributes
ACN	521874
Time
Date	200108
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : fci.airport
State Reference	VA
Altitude	agl single value : 5
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	landing : go around
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot instruction : instructor
Qualification	pilot : cfi
Experience	flight time last 90 days : 100 flight time total : 650 flight time type : 300
ASRS Report	521874
Person 2
Affiliation	other
Function	instruction : trainee
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure non adherence : far non adherence : company policies other anomaly other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	other
Consequence	other other
Supplementary
Problem Areas	Aircraft Company Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

Density altitude 1700 ft 28 degree C. Airport 237 ft MSL. 5500 ft runway. Instructor with student practicing a go around. C172 developing 2200 RPM's fully throttled. Full flaps. No evident climb. Seat rails on instructor side, disengaged and slid back. Aircraft lost lift, veered toward runway edge light. Light was hit, small knick in blade of propeller. No injuries. Minor damage to light. Seat RAIL disengaging, high density altitude, full flaps go around contributed to damage.

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Original NASA ASRS Text

Title: C172 INSTRUCTOR AND TRAINEE WERE ATTEMPTING A GAR WITH FULL FLAPS. THE INSTRUCTOR'S SEAT TRACK LOCK BECAME DISENGAGED AND THE INSTRUCTOR WAS UNABLE TO CTL THE ACFT.

Narrative: DENSITY ALT 1700 FT 28 DEG C. ARPT 237 FT MSL. 5500 FT RWY. INSTRUCTOR WITH STUDENT PRACTICING A GAR. C172 DEVELOPING 2200 RPM'S FULLY THROTTLED. FULL FLAPS. NO EVIDENT CLB. SEAT RAILS ON INSTRUCTOR SIDE, DISENGAGED AND SLID BACK. ACFT LOST LIFT, VEERED TOWARD RWY EDGE LIGHT. LIGHT WAS HIT, SMALL KNICK IN BLADE OF PROP. NO INJURIES. MINOR DAMAGE TO LIGHT. SEAT RAIL DISENGAGING, HIGH DENSITY ALT, FULL FLAPS GAR CONTRIBUTED TO DAMAGE.

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.