Emergency declared for priority handling in forced landing after go around attempt.

Attributes
ACN	283373
Time
Date	199409
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : isp
State Reference	NY
Altitude	msl bound lower : 750 msl bound upper : 750
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : isp
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : approach landing : go around other
Route In Use	approach : visual
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : private
Experience	flight time last 90 days : 27 flight time total : 920 flight time type : 745
ASRS Report	283373
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	other
Supplementary
Primary Problem	Aircraft

Narrative:

Because another aircraft was on runway during my final, tower commanded me to go around. I complied and added full power. Engine coughed and hesitated. I elected to immediately reduce power and circled right into downwind, base, and short final following a radio call to tower, informing them that I 'had a problem and required immediate landing.' a normal landing was made on runway 24. I received landing clearance and was informed that fire equipment was rolling. The following monday mechanics found the accelerator pump discharge tube from the carburetor missing. Consistent with pieces of debris found earlier in #2 cylinder (up 'till now unexplained) my airbase states this is a fairly common problem with carbs. Callback conversation with reporter revealed the following information: reporter was in a PA-28-140. The failed part, the accelerator tube, was cited by the maintenance facility as having been involved in 'several' incidents referencing engine problems. The accelerator tube affects the aircraft's performance capabilities in any rapid acceleration demands upon the engine. The reporter has not had to resort to any 'special' procedures regarding this carburetor problem. He stated that, since he always cuts open his oil filter after changing oil and filter, this procedure will cover the carburetor accelerator tube situation (so far as a prognosis of parts coming unglued). This is the way he can check for any metallic particles within the filter as a gauge of any internal engine deterioration. Reporter is very conservative regarding his maintenance procedures. He changes his oil every 30 hours versus the 50 hours allowed or recommended.

Original NASA ASRS Text

Title: EMER DECLARED FOR PRIORITY HANDLING IN FORCED LNDG AFTER GAR ATTEMPT.

Narrative: BECAUSE ANOTHER ACFT WAS ON RWY DURING MY FINAL, TWR COMMANDED ME TO GAR. I COMPLIED AND ADDED FULL PWR. ENG COUGHED AND HESITATED. I ELECTED TO IMMEDIATELY REDUCE PWR AND CIRCLED R INTO DOWNWIND, BASE, AND SHORT FINAL FOLLOWING A RADIO CALL TO TWR, INFORMING THEM THAT I 'HAD A PROB AND REQUIRED IMMEDIATE LNDG.' A NORMAL LNDG WAS MADE ON RWY 24. I RECEIVED LNDG CLRNC AND WAS INFORMED THAT FIRE EQUIP WAS ROLLING. THE FOLLOWING MONDAY MECHS FOUND THE ACCELERATOR PUMP DISCHARGE TUBE FROM THE CARB MISSING. CONSISTENT WITH PIECES OF DEBRIS FOUND EARLIER IN #2 CYLINDER (UP 'TILL NOW UNEXPLAINED) MY AIRBASE STATES THIS IS A FAIRLY COMMON PROB WITH CARBS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR WAS IN A PA-28-140. THE FAILED PART, THE ACCELERATOR TUBE, WAS CITED BY THE MAINT FACILITY AS HAVING BEEN INVOLVED IN 'SEVERAL' INCIDENTS REFING ENG PROBS. THE ACCELERATOR TUBE AFFECTS THE ACFT'S PERFORMANCE CAPABILITIES IN ANY RAPID ACCELERATION DEMANDS UPON THE ENG. THE RPTR HAS NOT HAD TO RESORT TO ANY 'SPECIAL' PROCS REGARDING THIS CARB PROB. HE STATED THAT, SINCE HE ALWAYS CUTS OPEN HIS OIL FILTER AFTER CHANGING OIL AND FILTER, THIS PROC WILL COVER THE CARB ACCELERATOR TUBE SIT (SO FAR AS A PROGNOSIS OF PARTS COMING UNGLUED). THIS IS THE WAY HE CAN CHK FOR ANY METALLIC PARTICLES WITHIN THE FILTER AS A GAUGE OF ANY INTERNAL ENG DETERIORATION. RPTR IS VERY CONSERVATIVE REGARDING HIS MAINT PROCS. HE CHANGES HIS OIL EVERY 30 HRS VERSUS THE 50 HRS ALLOWED OR RECOMMENDED.

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.