<< >> NASA ASRS Report 598612, November 2003

A C172 CFI experienced engine problems at lit and informed the tower who sent around a C130, giving the reporter landing priority.

Attributes
ACN	598612
Time
Date	200311
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : lit.airport
State Reference	AR
Altitude	agl single value : 400
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : lit.tower
Operator	general aviation : instructional
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Route In Use	approach : traffic pattern
Flight Plan	None
Aircraft 2
Controlling Facilities	tower : lit.tower
Make Model Name	Hercules (C-130)
Flight Phase	landing : go around
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : cfi pilot : commercial pilot : flight engineer pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 30 flight time total : 1100 flight time type : 600
ASRS Report	598612
Person 2
Affiliation	other
Function	instruction : trainee
Events
Anomaly	aircraft equipment problem : critical conflict : airborne less severe
Independent Detector	other flight crewa
Resolutory Action	flight crew : executed go around flight crew : landed in emergency condition flight crew : took evasive action
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

After flying an ILS approach to 100 ft above decision ht, a go around was initiated. The throttle was pushed in the maximum power position, and the carburetor heat was turned off. The engine started missing and running rough with power surges. Climbing through 800 ft and mid field, I requested an immediate entry into left traffic for runway 36 and informed the controller of the engine trouble. The controller cleared me to land on runway 36, but had to send a C130 on short final around. A normal landing was made on runway 36. The engine smoothed out when the throttle was pulled back. A run-up was done after landing, and the problem could not be duplicated.

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Original NASA ASRS Text

Title: A C172 CFI EXPERIENCED ENG PROBS AT LIT AND INFORMED THE TWR WHO SENT AROUND A C130, GIVING THE RPTR LNDG PRIORITY.

Narrative: AFTER FLYING AN ILS APCH TO 100 FT ABOVE DECISION HT, A GAR WAS INITIATED. THE THROTTLE WAS PUSHED IN THE MAX PWR POS, AND THE CARB HEAT WAS TURNED OFF. THE ENG STARTED MISSING AND RUNNING ROUGH WITH PWR SURGES. CLBING THROUGH 800 FT AND MID FIELD, I REQUESTED AN IMMEDIATE ENTRY INTO L TFC FOR RWY 36 AND INFORMED THE CTLR OF THE ENG TROUBLE. THE CTLR CLRED ME TO LAND ON RWY 36, BUT HAD TO SEND A C130 ON SHORT FINAL AROUND. A NORMAL LNDG WAS MADE ON RWY 36. THE ENG SMOOTHED OUT WHEN THE THROTTLE WAS PULLED BACK. A RUN-UP WAS DONE AFTER LNDG, AND THE PROB COULD NOT BE DUPLICATED.

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.