NTSB Identification: ATL83FA133.
The docket is stored on NTSB microfiche number 21154.
Accident occurred Thursday, March 10, 1983 in CHESAPEAKE, VA
Aircraft: GRUMMAN AMERICAN AA-1B, registration: N6266L
Injuries: 2 Minor.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE PLT TOOK OFF ON RWY 4 & MADE A CLIMBING LEFT TURN FOR A DOWNWIND DEPARTURE. AT APRX 900 FT, THERE WAS A PARTIAL LOSS OF POWER TO ABOUT IDLE RPM. THE PLT STATED THAT HE SWITCHED FUEL TANKS, APPLIED CARBURETOR HEAT & PUMPED THE THROTTLE, ALL TO NO AVAIL. HE TURNED BACK TO THE ARPT, BUT WAS UNABLE TO REACH THE RWY. THE NOSE GEAR COLLAPSED DURING A LANDING ON SOFT TERRAIN, APRX 150 YARDS SHORT OF RWY 22. AN INVESTIGATION REVEALED THAT THE INSIDE SCREEN & SPONGE ELEMENT OF THE AIR INTAKE FILTER, PN BA-4210, HAD COME LOOSE. SUBSEQUENTLY, THE SCREEN & SPONGE HAD BECOME LODGED IN THE THROAT OF THE CARBURETOR AIR BOX & OBSTRUCTED THE AIRFLOW TO THE CARBURETOR. THE METAL IN THE SCREEN WAS FOUND TO BE NON-MAGNETIC. AD 81-15-03 HAD BEEN ISSUED TO CORRECT THE FILTER PROBLEM BY REPLACING THE ALUMINUM SCREEN WITH A STEEL SCREEN.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

FUEL SYSTEM,RAM AIR/INDUCTION AIR..LOOSE

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

MAINTENANCE,COMPLIANCE WITH AD..NOT PERFORMED..OTHER MAINTENANCE PERSONNEL

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

FUEL SYSTEM,RAM AIR/INDUCTION AIR..BLOCKED(PARTIAL)


Contributing Factors

TERRAIN CONDITION..SOFT


Contributing Factors

LANDING GEAR,NOSE GEAR..OVERLOAD

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